期刊文献+
共找到55篇文章
< 1 2 3 >
每页显示 20 50 100
Groundwater recharge via precipitation in the Badain Jaran Desert,China 被引量:2
1
作者 Zhe Wang Li-juan Wang +3 位作者 Jian-mei Shen Zhen-long Nie Le Cao Ling-qun Meng 《Journal of Groundwater Science and Engineering》 2024年第1期109-118,共10页
Precipitation infiltration serves as a significant source of groundwater in the Badain Jaran Desert.To investigate variations in precipitation infiltration within the desert,this study collected data on moisture conte... Precipitation infiltration serves as a significant source of groundwater in the Badain Jaran Desert.To investigate variations in precipitation infiltration within the desert,this study collected data on moisture content and temperature from the vadose zone through in-situ field monitoring.Utilizing these data,a numerical model is employed to explore the mechanism of groundwater recharge via precipitation.The results are as follows:(1)Moisture content and temperature in the shallow vadose zone exhibit significant seasonal variations,with moisture content diminishing with increasing depth;(2)Groundwater recharge via precipitation infiltration initially increases and then decreases with groundwater level depth(GWD).Peak groundwater recharge via precipitation occurs at a GWD of 0.75 m,decreasing to merely 0.012 cm at GWDs exceeding 2 m;(3)Groundwater is no longer susceptible to phreatic water evaporation when the GWD reaches approximately 3.7 m.Therefore,GWD plays a crucial role in governing groundwater recharge via precipitation in the Badain Jaran Desert. 展开更多
关键词 Badain Jaran Desert Vadose zone groundwater recharge In situ monitoring Numerical simulation
下载PDF
Clogging caused by coupled grain migration and compaction effect during groundwater recharge for unconsolidated sandstone reservoir in groundwater-source heat pump
2
作者 Fujian Yang Jing Luo +3 位作者 Guiling Wang Hejuan Liu Dawei Hu Hui Zhou 《Journal of Rock Mechanics and Geotechnical Engineering》 SCIE CSCD 2024年第8期2947-2959,共13页
In unconsolidated sandstone reservoirs,presence of numerous movable grains and a complex grain size composition necessitates a clear understanding of the physical clogging process for effective groundwater recharge in... In unconsolidated sandstone reservoirs,presence of numerous movable grains and a complex grain size composition necessitates a clear understanding of the physical clogging process for effective groundwater recharge in groundwater-source heat pump systems.To investigate this,a series of seepage experiments was conducted under in situ stress conditions using unconsolidated sandstone samples with varying grain compositions.The clogging phenomenon arises from the combined effects of grain migration and compaction,wherein the migration of both original and secondary crushed fine-grain particles blocks the seepage channels.Notably,grain composition influences the migration and transport properties of the grains.For samples composed of smaller grains,the apparent permeability demonstrates a transition from stability to decrease.In contrast,samples with larger grains experience a skip at the stability stage and directly enter the decrease stage,with a minor exception of a slight increase observed.Furthermore,a unique failure mode characterized by diameter shrinkage in the upper part of the sample is observed due to the combined effects of grain migration and in situ stress-induced compaction.These testing results contribute to a better understanding of the clogging mechanism caused by the coupled effects of grain migration and compaction during groundwater recharge in unconsolidated sandstone reservoirs used in groundwater-source heat pump systems. 展开更多
关键词 groundwater-source heat pump CLOGGING Grain migration Compaction effect groundwater recharge Unconsolidated sandstone
下载PDF
Estimation of Groundwater Recharge Using Water Table Fluctuation Method in Bamako and Surrounding Areas, Mali
3
作者 Ibrahima Konotio Hamadoun Bokar Adama Touré 《Journal of Geoscience and Environment Protection》 2024年第9期230-245,共16页
Bamako’s geographic and demographic expansion is sure to increase the need for water, and the slow development of the water supply network seems unable to meet this need. The knowledge of the approximate quantity of ... Bamako’s geographic and demographic expansion is sure to increase the need for water, and the slow development of the water supply network seems unable to meet this need. The knowledge of the approximate quantity of water reaching the groundwater is crucial, given the high dependence of this city and its surrounding area on groundwater. The aim of this study is to estimate the average groundwater recharge on a monthly scale, based on measurements taken over a 24-month period by using Water Table Fluctuation (WTF). The monthly recharge values obtained from the 15 piezometers in the study area by using WTF method vary from 1.04 to 38.81 mm with an average value of 9.74 mm. As part of the precipitations, these values represent respectively 1.29%, 48.52% and 12.17% of monthly average precipitation. It appears in this study that despite the piezometers belonging to the same climatic zone, the recharge rate can be different because of many factors such as the thickness of the aquifers, the soil and geology type, the local land cover and land use activities. 展开更多
关键词 groundwater recharge Specific Yield HYDROGRAPH PRECIPITATION
下载PDF
Optimizing groundwater recharge plan in North China Plain to repair shallow groundwater depression zone, China 被引量:2
4
作者 Rui-fang Meng Hui-feng Yang +4 位作者 Xi-lin Bao Bu-yun Xu Hua Bai Jin-cheng Li Ze-xin Liang 《Journal of Groundwater Science and Engineering》 2023年第2期133-145,共13页
The North China Plain is one of the main grain producing areas in China. However, overexploitation has long been unsustainable since the water supply is mainly from groundwater. Since 2014,the South-to-North Water Div... The North China Plain is one of the main grain producing areas in China. However, overexploitation has long been unsustainable since the water supply is mainly from groundwater. Since 2014,the South-to-North Water Diversion Project's central route has been charted to the integrated management of water supply and over-exploitation, which has alleviated the problem to a certain extent. Although the Ministry of Water Resources has made many efforts on groundwater recharge since 2018 most of which have been successful, the recharge has not yet been sufficiently focused on the repair of shallow groundwater depression zones. It still needs further optimization. This paper discusses this particular issue,proposes optimized recharge plan and provides the following recommendations:(1) Seven priority target areas are selected for groundwater recharge in alluvial and proluvial fans in the piedmont plain, and the storage capacity is estimated to be 181.00×10~8 m~3;(2) A recharge of 31.18×10~8 m~3/a is required by 2035 to achieve the repair target;(3) It is proposed to increase the recharge of Hutuo River, Dasha River and Tanghe River to 19.00×10~8 m~3/a and to rehabilitate Gaoliqing-Ningbailong Depression Zone;increase the recharge of Fuyang River, Zhanghe River and Anyang River to 7.05×10~8 m~3/a and rehabilitate Handan Feixiang-Guangping Depression Zone;increase the recharge of Luanhe River by 0.56×10~8 m~3/a and restore Tanghai Depression Zone and Luanan-Leting Depression Zone;moderately reduce the amount of water recharged to North Canal and Yongding River to prevent excessive rebound of groundwater;(4) Recharge through well is implemented on a pilot basis in areas of severe urban ground subsidence and coastal saltwater intrusion;(5) An early warning mechanism for groundwater quality risks in recharge areas is established to ensure the safety. The numerical groundwater flow model also proves reasonable groundwater level restoration in the depression zones by 2035. 展开更多
关键词 North China Plain groundwater recharge groundwater depression zone recharge target areas Storage capacity recharge source recharge effectiveness
下载PDF
Evolution of groundwater recharge-discharge balance in the Turpan Basin of China during 1959-2021 被引量:1
5
作者 QIN Guoqiang WU Bin +2 位作者 DONG Xinguang DU Mingliang WANG Bo 《Journal of Arid Land》 SCIE CSCD 2023年第9期1037-1051,共15页
Groundwater overexploitation is a serious problem in the Turpan Basin,Xinjiang Uygur Autonomous Region of China,causing groundwater level declines and ecological and environmental problems such as the desiccation of k... Groundwater overexploitation is a serious problem in the Turpan Basin,Xinjiang Uygur Autonomous Region of China,causing groundwater level declines and ecological and environmental problems such as the desiccation of karez wells and the shrinkage of lakes.Based on historical groundwater data and field survey data from 1959 to 2021,we comprehensively studied the evolution of groundwater recharge and discharge terms in the Turpan Basin using the groundwater equilibrium method,mathematical statistics,and GIS spatial analysis.The reasons for groundwater overexploitation were also discussed.The results indicated that groundwater recharge increased from 14.58×10^(8)m^(3)in 1959 to 15.69×10^(8)m^(3)in 1980,then continued to decrease to 6.77×10^(8)m^(3)in 2021.Groundwater discharge increased from 14.49×10^(8)m^(3)in 1959 to 16.02×10^(8)m^(3)in 1989,while continued to decrease to 9.97×10^(8)m^(3)in 2021.Since 1980,groundwater recharge-discharge balance has been broken,the decrease rate of groundwater recharge exceeded that of groundwater discharge and groundwater recharge was always lower than groundwater discharge,showing in a negative equilibrium,which caused the continuous decrease in groundwater level in the Turpan Basin.From 1980 to 2002,groundwater overexploitation increased rapidly,peaking from 2003 to 2011 with an average overexploitation rate of 4.79×10^(8)m^(3)/a;then,it slowed slightly from 2012 to 2021,and the cumulative groundwater overexploitation was 99.21×10^(8)m^(3)during 1980-2021.This research can provide a scientific foundation for the restoration and sustainable use of groundwater in the overexploited areas of the Turpan Basin. 展开更多
关键词 groundwater overexploitation groundwater recharge groundwater discharge climate change human activities Turpan Basin
下载PDF
Isotope Method for Confined Groundwater Recharge of the Lower Reaches of the Heihe River,Inner Mongolia,China 被引量:5
6
作者 CHEN Jiansheng ZHAO Xia +2 位作者 FAN Zhechao and WANG Jiyang 1 State Key Laboratory of Hydrology-Water Resources and Hydraulic Engineering,Hohai University,Nanjing 210098,China 2 Institute of Isotope Hydrology Research,Hohai University,Nanjing 210098,China 3 Institute of Geology and Geophysics,Chinese Academy of Science,Beijing 100018,China 《Acta Geologica Sinica(English Edition)》 SCIE CAS CSCD 2007年第4期668-673,共6页
Environmental isotopes have been appfied to analyze confined groundwater recharge in the lower reaches of the Heihe River, Inner Mongolia. CFC is regarded as a tracer that determines the date of groundwater, the date ... Environmental isotopes have been appfied to analyze confined groundwater recharge in the lower reaches of the Heihe River, Inner Mongolia. CFC is regarded as a tracer that determines the date of groundwater, the date being less than 45 a. The confined groundwater within the Gurinai area and Ejin Basin other than the surface water of Heihe River might have originated from precipitation from Qilian Mountain or/and the Tibetan Plateau. The deep confined groundwater overflows into an upper aquifer and emerges into the ground, forming springs and lakes within the low-lying area. The recharge volume is estimated to be around 400 million-cubic meters. 展开更多
关键词 ISOTOPE CFC Ejin Basin Gurinai groundwater recharge PRECIPITATION Qilian Mountain
下载PDF
An approach to delineate groundwater recharge potential sites in Ambalantota,Sri Lanka using GIS techniques 被引量:5
7
作者 i.p.senanayake d.m.d.o.k.dissanayake +1 位作者 b.b.mayadunna w.l.weerasekera 《Geoscience Frontiers》 SCIE CAS CSCD 2016年第1期115-124,共10页
The demand for fresh water in Hambantota District, Sri Lanka is rapidly increasing with the enormous amount of ongoing development projects in the region. Nevertheless, the district experiences periodic water stress c... The demand for fresh water in Hambantota District, Sri Lanka is rapidly increasing with the enormous amount of ongoing development projects in the region. Nevertheless, the district experiences periodic water stress conditions due to seasonal precipitation patterns and scarcity of surface water resources.Therefore, management of available groundwater resources is critical, to fulfil potable water requirements in the area. However, exploitation of groundwater should be carried out together with artificial recharging in order to maintain the long term sustainability of water resources. In this study, a GIS approach was used to delineate potential artificial recharge sites in Ambalantota area within Hambantota. Influential thematic layers such as rainfall, lineament, slope, drainage, land use/land cover, lithology, geomorphology and soil characteristics were integrated by using a weighted linear combination method. Results of the study reveal high to moderate groundwater recharge potential in approximately 49% of Ambalantota area. 展开更多
关键词 GIS groundwater recharge Water management Weighted overlay Sri Lanka
下载PDF
A field study of advanced municipal wastewater treatment technology for artificial groundwater recharge 被引量:6
8
作者 PI Yun-zheng WANG Jian-long 《Journal of Environmental Sciences》 SCIE EI CAS CSCD 2006年第6期1056-1060,共5页
Field studies were conducted to investigate the advanced treatment of the municipal secondary effluent and a subsequent artificial groundwater recharge at Gaobeidian Wastewater Treatment Plant, Beijing. To improve the... Field studies were conducted to investigate the advanced treatment of the municipal secondary effluent and a subsequent artificial groundwater recharge at Gaobeidian Wastewater Treatment Plant, Beijing. To improve the secondary effluent quality, the combined process of powdered activated carbon adsorption, flocculation and rapid sand filtration was applied, which could remove about 400 dissolved organic carbon (DOC) and 70% adsorbable organic halogens. The results of liquid size exclusion chromatography indicate that in the adsorption unit the removed organic fraction was mainly low molecular weight compounds. The fractions removed by the flocculation unit were polysaccharides and high molecular weight compounds. The retention of water in summer in the open recharge basins resulted in a growth of algae. Consequently, DOC increased in the polysaccharide and high molecular weight humic substances fraction. The majority of the DOC removal during soil passage took place in the unsaturated area. A limited reduction of DOC was observed in the aquifer zone. 展开更多
关键词 artificial groundwater recharge soil aquifer treatment dissolved organic carbon
下载PDF
Impact of Land Use Change on Groundwater Recharge in Guishui River Basin,China 被引量:5
9
作者 PAN Yun GONG Huili +2 位作者 ZHOU Demin LI Xiaojuan NAKAGOSHI Nobukazu 《Chinese Geographical Science》 SCIE CSCD 2011年第6期734-743,共10页
It is important to understand how land use change impacts groundwater recharge, especially for regions that are undergoing rapid urbanization and there is limited surface water. In this study, the hydrological process... It is important to understand how land use change impacts groundwater recharge, especially for regions that are undergoing rapid urbanization and there is limited surface water. In this study, the hydrological processes and re- charge ability of various land use types in Guishui River Basin, China (in Beijing Municipality) were analyzed. The impact of land use change was investigated based on water balance modeling, WetSpass and GIS. The results indicate that groundwater recharge accounts for only 21.16% of the precipitation, while 72.54% is lost in the form of evapotranspiration. The annual-lumped groundwater recharge rate decreases in the order of cropland, grassland, urban land, and forest. Land use change has resulted in a decrease of 4 x 106 m3 of yearly groundwater recharge in the study area, with a spatially averaged rate of 100.48 mm/yr and 98.41 mm/yr in 1980 and 2005, respectively. This variation has primarily come from an increase of urban area and rural settlements, as well as a decrease of cropland. 展开更多
关键词 groundwater recharge land use change soil water balance hydrological processes
下载PDF
Natural water purification and water management by artificial groundwater recharge 被引量:6
10
作者 Klaus-Dieter BALKE 《Journal of Zhejiang University-Science B(Biomedicine & Biotechnology)》 SCIE CAS CSCD 2008年第3期221-226,共6页
Worldwide,several regions suffer from water scarcity and contamination.The infiltration and subsurface storage of rain and river water can reduce water stress.Artificial groundwater recharge,possibly combined with ban... Worldwide,several regions suffer from water scarcity and contamination.The infiltration and subsurface storage of rain and river water can reduce water stress.Artificial groundwater recharge,possibly combined with bank filtration,plant purification and/or the use of subsurface dams and artificial aquifers,is especially advantageous in areas where layers of gravel and sand exist below the earth's surface.Artificial infiltration of surface water into the uppermost aquifer has qualitative and quantitative advantages.The contamination of infiltrated river water will be reduced by natural attenuation.Clay minerals,iron hydroxide and humic matter as well as microorganisms located in the subsurface have high decontamination capacities.By this,a final water treatment,if necessary,becomes much easier and cheaper.The quantitative effect concerns the seasonally changing river discharge that influences the possibility of water extraction for drinking water purposes.Such changes can be equalised by seasonally adapted infiltration/extraction of water in/out of the aquifer according to the river discharge and the water need.This method enables a continuous water supply over the whole year.Generally,artificially recharged groundwater is better protected against pollution than surface water,and the delimitation of water protection zones makes it even more save. 展开更多
关键词 Artificial groundwater recharge Natural attenuation Water management
下载PDF
Groundwater Recharge and Mixing in Arid and Semiarid Regions:Heihe River Basin,Northwest China 被引量:4
11
作者 CAO Guoliang ZHENG Chunmiao Craig T.SIMMONS 《Acta Geologica Sinica(English Edition)》 SCIE CAS CSCD 2016年第3期971-987,共17页
A sound understanding of groundwater recharged from various sources occurring at different time scales is crucial for water management in arid and semi-arid river basins. Groundwater recharge sources and their geochem... A sound understanding of groundwater recharged from various sources occurring at different time scales is crucial for water management in arid and semi-arid river basins. Groundwater recharge sources and their geochemical evolution are investigated for the Heihe River Basin (HRB) in northwest China on the basis of a comprehensive compilation of geochemical and isotopic data. Geochemical mass- balance modeling indicates that mountain-block recharge accounts for a small fraction (generally less than 5%) of the shallow and deep groundwater sustaining the oasis, whereas infiltration of rivers and irrigation water contribute most of the groundwater recharge. Dedolomitization is the primary process responsible for the changes in groundwater chemical and carbon isotope compositions from the piedmont to the groundwater discharge zone, where the dedolomitization is very likely enhanced by modern agricultural activities affecting the shallow groundwater quality. Analysis of radioactive isotopes suggests that these primary recharge sources occur at two different time scales. Radiocarbon-derived groundwater age profiles indicate a recharge rate of approximately 12 mm/year, which probably occurred during 2000-7000 years B.P., corresponding to the mid-Holocene humid period. The recharge of young groundwater on the tritium-dated time scale is much higher, about 360 mm/year in the oasis region. Infiltration from irrigation canals and irrigation return flow are the primary contributors to the increased young groundwater recharge. This study suggests that groundwater chemistry in the HRB has been influenced by the complex interaction between natural and human-induced geochemical processes and that anthropogenic effects have played a more significant role in terms of both groundwater quantity and quality. 展开更多
关键词 Heihe River Basin groundwater recharge groundwater mixing isotope hydrology
下载PDF
Quantification of groundwater recharge and evapotranspiration along a semi-arid wetland transect using diurnal water table fluctuations 被引量:1
12
作者 JIA Wuhui YIN Lihe +4 位作者 ZHANG Maosheng ZHANG Xinxin ZHANG Jun TANG Xiaoping DONG Jiaqiu 《Journal of Arid Land》 SCIE CSCD 2021年第5期455-469,共15页
Groundwater is a vital water resource in arid and semi-arid areas.Diurnal groundwater table fluctuations are widely used to quantify rainfall recharge and groundwater evapotranspiration(ET_(g)).To assess groundwater r... Groundwater is a vital water resource in arid and semi-arid areas.Diurnal groundwater table fluctuations are widely used to quantify rainfall recharge and groundwater evapotranspiration(ET_(g)).To assess groundwater resources for sustainable use,we estimated groundwater recharge and ET_(g) using the diurnal water table fluctuations at three sites along a section with different depths to water table(DWT)within a wetland of the Mukai Lake in the Ordos Plateau,Northwest China.The water table level was monitored at an hourly resolution using a Keller DCX-22 A data logger that measured both the total pressure and barometric pressure,so that the effect of barometric pressure could be removed.At this study site,a rapid water table response to rainfall was observed in two shallow wells(i.e.,Obs1 and Obs2),at which diurnal water table fluctuations were also observed over the study period during rainless days,indicating that the main factors influencing water table variation are rainfall and ET_(g).However,at the deep-water table site(Obs3),the groundwater level only reacted to the heaviest rainfalls and showed no diurnal variations.Groundwater recharge and ET_(g) were quantified for the entire hydrological year(June 2017–June 2018)using the water table fluctuation method and the Loheide method,respectively,with depth-dependent specific yields.The results show that the total annual groundwater recharge was approximately 207 mm,accounting for 52%of rainfall at Obs1,while groundwater recharge was approximately 250 and 21 mm at Obs2 and Obs3,accounting for 63%and 5%of rainfall,respectively.In addition,the rates of groundwater recharge were mainly determined by rainfall intensity and DWT.The daily mean ET_(g) at Obs1 and Obs2 over the study period was 4.3 and 2.5 mm,respectively,and the main determining factors were DWT and net radiation. 展开更多
关键词 groundwater recharge groundwater evapotranspiration water table fluctuation semi-arid region Ordos Plateau
下载PDF
Spatial and temporal variation of groundwater recharge in shallow aquifer in the Thepkasattri of Phuket,Thailand 被引量:4
13
作者 Yacob T Tesfaldet Avirut Puttiwongrak Tanwa Arpornthip 《Journal of Groundwater Science and Engineering》 2020年第1期10-19,共10页
Whether groundwater resources can be sustainably utilized is largely determined and characterized by hydrogeological parameters.Estimating the groundwater recharge is one of the essential parameters for managing water... Whether groundwater resources can be sustainably utilized is largely determined and characterized by hydrogeological parameters.Estimating the groundwater recharge is one of the essential parameters for managing water resources and protecting water resources from contamination.This study researched the spatial and temporal variation of groundwater recharge in the Thepkasattri sub-district through integrating chloride mass balance(CMB)and water table fluctuation(WTF)methods.The chloride content of representative rainfall and groundwater samples was analyzed.Besides,WTF method was adopted from groundwater level data from 2012 to 2015.According to the CMB method,the mean recharge was estimated to be 1172 mm per year,accounting for 47%of the annual rainfall.Moreover,the estimated recharge from the WTF method took 26%of annual rainfall in 2015.The recharge was underestimated according to the WTF method,because of the uncertainty in specific yield estimates and the number of representative wells in the study area.Moreover,the correlation between rainfall and water table fluctuation data indicated the positive linear relationship between two parameters.The spatial recharge prediction indicated that recharge was higher(1200-1400 mm/yr)in the eastern and western catchment,while that in the central floodplains was between 800 mm/yr and 1100 mm/yr.In addition,low recharge value between 450 mm/yr and 800 mm/yr was observed in the south-west part of Thepkasattri.The spatial variation of recharge partly reflects the influences of land use and land cover of the study area. 展开更多
关键词 groundwater recharge Chloride mass balance EVAPOTRANSPIRATION Water table fluctuation RAINFALL KRIGING Thepkasattri
下载PDF
The Source of Groundwater Recharge Based on Entropy Theory in the Arid Areas of North China 被引量:1
14
作者 CHEN Jiansheng XU Yi 《Acta Geologica Sinica(English Edition)》 SCIE CAS CSCD 2016年第1期390-391,共2页
Objective Any natural system is constantly exchanging material, energy and information with the environment, and all tkese processes follow the basic law of thermodynamics, with no exception of groundwater recharge a... Objective Any natural system is constantly exchanging material, energy and information with the environment, and all tkese processes follow the basic law of thermodynamics, with no exception of groundwater recharge and discharge process. On the basis of the principle of the first law of thermodynamics, the reverse geochemical simulation method is widely used in the study of groundwater recharge, runoff and drainage process. However, some studies only consider the material conservation in theprocess, but ignore the probability of the transformation. 展开更多
关键词 The Source of groundwater recharge Based on Entropy Theory in the Arid Areas of North China
下载PDF
Isotope implications of groundwater recharge,residence time and hydrogeochemical evolution of the Longdong Loess Basin,Northwest China
15
作者 LING Xinying MA Jinzhu +2 位作者 CHEN Peiyuan LIU Changjie Juske HORITA 《Journal of Arid Land》 SCIE CSCD 2022年第1期34-55,共22页
Groundwater plays a dominant role in the eco-environmental protection of arid and semi-arid regions.Understanding the sources and mechanisms of groundwater recharge,the interactions between groundwater and surface wat... Groundwater plays a dominant role in the eco-environmental protection of arid and semi-arid regions.Understanding the sources and mechanisms of groundwater recharge,the interactions between groundwater and surface water and the hydrogeochemical evolution and transport processes of groundwater in the Longdong Loess Basin,Northwest China,is of importance for water resources management in this ecologically sensitive area.In this study,71 groundwater samples(mainly distributed at the Dongzhi Tableland and along the Malian River)and 8 surface water samples from the Malian River were collected,and analysis of the aquifer system and hydrological conditions,together with hydrogeochemical and isotopic techniques were used to investigate groundwater sources,residence time and their associated recharge processes.Results show that the middle and lower reaches of the Malian River receive water mainly from groundwater discharge on both sides of valley,while the source of the Malian River mainly comes from local precipitation.Groundwater of the Dongzhi Tableland is of a HCO3-Ca-Na type with low salinity.The reverse hydrogeochemical simulation suggests that the dissolution of carbonate minerals and cation exchange between Ca^(2+),Mg^(2+)and Na+are the main water-rock interactions in the groundwater system of the Dongzhi Tableland.Theδ^(18)O(from-11.70‰to-8.52‰)andδ2H(from-86.15‰to-65.75‰)values of groundwater are lower than the annual weighted average value of precipitation but closer to summer-autumn precipitation and soil water in the unsaturated zone,suggesting that possible recharge comes from the summer-autumn monsoonal heavy precipitation in the recent past(≤220 a).The corrected 14C ages of groundwater range from 3,000 to 25,000 a old,indicating that groundwater was mainly from precipitation during the humid and cold Late Pleistocene and Holocene periods.Groundwater flows deeper from the groundwater table and from the center to the east,south and west of the Dongzhi Tableland with estimated migration rate of 1.29-1.43 m/a.The oldest groundwater in the Quaternary Loess Aquifer in the Dongzhi Tableland is approximately 32,000 a old with poor renewability.Based on theδ^(18)O temperature indicator of groundwater,we speculate that temperature of the Last Glacial Maximum in the Longdong Loess Basin was 2.4℃-6.0℃ colder than the present.The results could provide us the valuable information on groundwater recharge and evolution under thick loess layer,which would be significative for the scientific water resources management in semi-arid regions. 展开更多
关键词 groundwater recharge hydrogeochemical evolution isotope technology 14C dating PALEOCLIMATE residence time Chinese Loess Plateau
下载PDF
Dynamics of groundwater recharge near a semi-arid Mediterranean intermittent stream under wet and normal climate conditions
16
作者 Youssef HAJHOUJI Younes FAKIR +2 位作者 Simon GASCOIN Vincent SIMONNEAUX Abdelghani CHEHBOUNI 《Journal of Arid Land》 SCIE CSCD 2022年第7期739-752,共14页
In arid and semi-arid stream-dominated systems,the temporal variability in groundwater recharge has not been widely addressed.Various questions remain about the sources of groundwater recharge,its patterns,and the app... In arid and semi-arid stream-dominated systems,the temporal variability in groundwater recharge has not been widely addressed.Various questions remain about the sources of groundwater recharge,its patterns,and the appropriate measuring techniques.Hence,the main objective of the present study was to assess the changes that might affect the pattern of groundwater recharge under wetter than normal surface water availability.Therefore,the groundwater depth was monitored near a semi-arid Mediterranean intermittent stream on the piedmont of the High Atlas Mountains in the mountain catchment of the Wadi Rheraya over two hydrological years(2014-2016)with different climate conditions:extreme wet and normal conditions.Groundwater recharge was assessed using the episodic master recession algorithm.During the two years,the pattern of groundwater recharge was dominated by episodic events and by a high seasonality from wet seasons to dry seasons.In the wet year(2014-2015),the highest groundwater recharge was recorded following an extreme flood,which deeply replenished groundwater.Furthermore,an exceptional steady state of the groundwater depth was induced by a steady groundwater recharge rate.For several groundwater recharge events,the assessed recharge had multiple sources,mainly from streamflow at the local scale,but possibly from precipitation,underflow,deep percolation or irrigation return from the upstream part of the catchment.Local recharge by streamflow was likely to be short-lived,and lateral recharge was likely to last longer.Consequently,the episodic master recession algorithm estimated the total groundwater recharge that could encompass various sources.In the future,more studies and multidisciplinary approaches should be carried out to partition these sources and determine their specific contributions.In semi-arid stream-dominated systems,different groundwater recharge patterns induced by extreme hydrological events(e.g.,wet events)and various potential sources of groundwater recharge should be considered when assessing and predicting groundwater recharge. 展开更多
关键词 groundwater recharge water table fluctuation episodic master recession algorithm episodic recharge wet year Wadi Rheraya Citation:Youssef HAJHOUJI
下载PDF
Assessment of Groundwater Recharge from Rainfall in the Plain of Cai Phan Rang, Vietnam
17
作者 Chau Tran Vinh Nguyen Minh Khuyen Nguyen Hong Hieu Doan Van Long Nguyen Tien Bach Trinh ThiThu Van 《Journal of Environmental Science and Engineering(A)》 2014年第3期141-149,共9页
This paper presents the quantitative assessment results of rainwater supply to groundwater in Cai Phan Rang River basin, Ninh Thuan province, Vietnam. In order to obtain the results, the authors developed two experime... This paper presents the quantitative assessment results of rainwater supply to groundwater in Cai Phan Rang River basin, Ninh Thuan province, Vietnam. In order to obtain the results, the authors developed two experimental areas with 10 wells which were monitored in one year to assess the infiltration supply of rainwater to groundwater. The results of this research assessed the amount of rainwater infiltrates into groundwater varies from 307.16-314.98 tam·year^-1, average is 311 mm·year^-1. The findings are significant in terms of science which identify sources of groundwater storage from the infiltration supply of rainwater. The findings are also practical in suggesting measures to reserve groundwater for the purpose of socio-economic development in the study area. 展开更多
关键词 groundwater recharge rainwater infiltration rainwater infiltration into groundwater.
下载PDF
Basin Groundwater Recharge and Discharge in the Gully Erosion Prone Areas of Anambra, Nigeria
18
作者 E.I. Okoro B.C.E. Egboka +2 位作者 E.I. Okpoko O.L. Anike E.K. Enekwechi 《Journal of Environmental Science and Engineering》 2011年第7期925-930,共6页
Anambra State of Nigeria is ravaged by ecological hazards of gully erosion and landslides. Over 450 active gully and landslide sites with depths ranging from 5 m to over 120 m are concentrated on both sides of the Awk... Anambra State of Nigeria is ravaged by ecological hazards of gully erosion and landslides. Over 450 active gully and landslide sites with depths ranging from 5 m to over 120 m are concentrated on both sides of the Awka-Nanka-Umuchu-Orlu cuesta. The Idemili River and Odo River form the major drainage basins of the area. The geomorphic characteristic of the cuesta/escarpment is a major controlling factor in groundwater recharge and discharge within the drainage basins. Rise in aquifer levels result in hydrogeotechnical implications of gully development and landslides. The calculated values of hydraulic properties of conductivity and transmissivity range from 1.20×10^-1 to 5.93×10^-1 cm/s and 1.15×10^5-13.05×10.3 m^2/s respectively. The values of groundwater velocity and groundwater discharge were 82 m.yearl and 2.96×10^6 m^3.yearl The plasticity index of the soil in the gully prone areas is relatively low ranging from 12.50-36.57%. The unique features of the geologic formations together with obtained aquifer characteristics favour gully/landslide hazards in the area. 展开更多
关键词 groundwater recharge/discharge drainage basin gully erosion landslides.
下载PDF
Assessing the Effects of Land Use/Land Cover Change on Groundwater Recharge in a Sudano-Sahelian Zone: Case of Koda Catchment, Mali, West Africa
19
作者 Oumou Diancoumba Adama Toure +6 位作者 Ibrahima Daou Seriba Konare Taoufik Hermassi Mohamed Kotti Hamadoun Bokar Nourredine Galoul Zoubeida Bargaoui 《Journal of Geoscience and Environment Protection》 2022年第8期39-54,共16页
Groundwater is the main source of water in the studied area;therefore, it is significantly requested in all the activities of the inhabitants. These natural resources are affected by some drivers especially Land Use/L... Groundwater is the main source of water in the studied area;therefore, it is significantly requested in all the activities of the inhabitants. These natural resources are affected by some drivers especially Land Use/Land Cover (LULC) and Climate Change. A Land Use/Land Cover (LULC) dynamics study is crucial for any global environmental change evaluation. For instance, for a given place, its change could affect considerably water cycle components. Therefore, the knowledge of the effects of LULC on groundwater recharge is then the key in water resources management system, in particular for the decision makers of the Koda Catchment where the scarcity of the water availability for agriculture is real. The spatiotemporal variation of the different units of LULC present in the catchment has been examined in this study. The Envi 4.5 Software coupled with ArcGIS using the Supervised Classification method, was applied to subset Landsat images from 1990 to 2016. Five (5) major LULC categories, cultivated land, bare land, herbaceous savannah, shrubby savannah and degraded savannah, were identified in the catchment. In a parallel direction, the groundwater recharge has been estimated through the conceptual Gardenia model for the same period 1990-2016. The results showed that the portion of cultivated land and bare land increased (14.9% and 23.5% respectively) while, the portion of savannah decreased: herbaceous savannah by 24.4%, degraded savannah by 10.32% and Shrubby Savannah by 3.6%. Savannah areas in Koda catchment is converted to agricultural land and urban area due to human activities. The decline of 8.4% in groundwater recharge might become so far obvious in the future if the current rate of deforestation continues in the Koda catchment. There is a need to closely monitor the changes in LULC for sustainable development. The results of this study could help to well understand the recharge pattern across Koda catchment under a changing LULC. 展开更多
关键词 LULC Change groundwater recharge Gardenia Model GIS Koda Catchment MALI
下载PDF
Influence of Land Use Land Cover Change on Groundwater Recharge in the Continental Terminal Area of Abidjan,Ivory Coast
20
作者 Kouakou Koffi Abdelaziz Yalo Nicaise +5 位作者 Luc Séguis Ismaila Ouattara Ouedraogo Moussa Kouassi Kouame Auguste Bamory Kamagate Kone Diakaria 《Journal of Water Resource and Protection》 2020年第5期431-453,共23页
The process by which rainfall reaches the aquifer in a sedimentary area is infiltration. This process could be affected quantitatively or qualitatively by the changes in the land use land cover (LULC) as a result of a... The process by which rainfall reaches the aquifer in a sedimentary area is infiltration. This process could be affected quantitatively or qualitatively by the changes in the land use land cover (LULC) as a result of anthropogenic activities which could affect groundwater reserves. This study focuses on the influence of LULC change on groundwater recharge in the context of urbanization and population growth. Four weather stations data and satellite image data were used in order to evaluate water infiltration which is the amount of water that reaches the piezometric surface from 1990 to 2016. The spatial-temporal LULC change in relation to urbanization sprawl was assessed based on a series of Landsat images for 1990, 2000 and 2016. The maximum likelihood pixel-based on classification method was used to analyze the spatial-temporal LULC dynamics. The Thiessen polygon method was used for the mean area precipitation computation. The recharge was determined using water balance method after determining the runoff based on the Soil Conservation Service curve number method. The results show an increase in built-up and agricultural land, while the forest and shrub areas declined with water body remaining unchanged over the period 1990-2016. The decline in forest could be imputed to the demographic and socio-economic growth as expressed by the expansion of agriculture and urbanization. Groundwater recharge and runoff results are respectively 34%, 20% in 1999;21%, 46% in 2000 and 26%, 14% in 2016 of rainfall and show their strong dependence on precipitation and LULC change. 展开更多
关键词 groundwater recharge RUNOFF LULC SCS Curve Number Continental Terminal ABIDJAN
下载PDF
上一页 1 2 3 下一页 到第
使用帮助 返回顶部