期刊文献+
共找到1,948篇文章
< 1 2 98 >
每页显示 20 50 100
Translation Strategies of Red Tourism Terms in the Central Plains-Taking Red Central Plains as an Example
1
作者 YUN Meng-nan 《Journal of Literature and Art Studies》 2024年第2期133-137,共5页
In recent years,the Red Tourism in Central Plains has gradually become a new type of thematic tourism form,which is an important carrier to carry out patriotism and revolutionary traditional education and carry forwar... In recent years,the Red Tourism in Central Plains has gradually become a new type of thematic tourism form,which is an important carrier to carry out patriotism and revolutionary traditional education and carry forward the national spirit.The translation of red tourism publicity is an important window for spreading Chinese culture,and the translation of professional terms is an important link in the red tourism publicity.How to spread the red culture of the Central Plains,glow the charm of the Central Plains culture,enhance the influence of the Central Plains culture,and spread the Central Plains culture to the world has become the mission of every child of the Central Plains.This paper adopts the case analysis method,combined with the specific and typical cases in“Red Central Plains”,and uses different translation strategies and methods to explore the difficulties and solutions of the translation of terms in the red tourism text. 展开更多
关键词 Red tourism Publicity translation central plains culture translation strategy
下载PDF
The Palaeoclimate Variations in the Central Plains Since the Interstade of the Last Glacial Stage 被引量:1
2
作者 XIAO Huaguo WU Xihao +3 位作者 JIANG Fuchu XUE Bin TIAN Guoqiang LIU Ke 《Acta Geologica Sinica(English Edition)》 SCIE CAS CSCD 1998年第1期108-113,共6页
Through the study of a high-resolution loess record in the Central Plains, the short—term palaeoclimatic variations since the interstade of the last glacial stage have been discussed in this paper. The palaeoclimate ... Through the study of a high-resolution loess record in the Central Plains, the short—term palaeoclimatic variations since the interstade of the last glacial stage have been discussed in this paper. The palaeoclimate in the East Asian monsoon areas shows different variation patterns in summer and winter. A correlation of the palaeomonsoon records of loess with the δ18O records of the ice core and deep sea is made, and some of the causes for their differences are also discussed. 展开更多
关键词 palaeoclimate changes the central plains last glacial stage
下载PDF
Study on Regional Image of Henan Province against the Background of Central Plains Rising
3
作者 REN Jun 《Journal of Landscape Research》 2013年第4期47-48,共2页
Relevant theories of regional image were elaborated, and significance of regional image for the development of Henan Province was analyzed. On the basis of characteristic cultural resources in the local area, the ways... Relevant theories of regional image were elaborated, and significance of regional image for the development of Henan Province was analyzed. On the basis of characteristic cultural resources in the local area, the ways of building regional image of Henan were explored from the perspectives of orientation of cultural characteristics, regional image identification system and regional image evaluation. 展开更多
关键词 central plains Economic Zone IMAGE of HENAN REGIONAL IMAGE
下载PDF
Trends of central line-associated bloodstream infections in the intensive care unit in the Kingdom of Bahrain:Four years’experience
4
作者 Safaa Al-Khawaja Nermin Kamal Saeed +2 位作者 Sanaa Al-khawaja Nashwa Azzam Mohammed Al-Biltagi 《World Journal of Critical Care Medicine》 2021年第5期220-231,共12页
BACKGROUND The central venous line is an essential component in monitoring and managing critically ill patients.However,it poses patients with increased risks of severe infections with a higher probability of morbidit... BACKGROUND The central venous line is an essential component in monitoring and managing critically ill patients.However,it poses patients with increased risks of severe infections with a higher probability of morbidity and mortality.AIM To define the trends of the rates of central line-associated bloodstream infections(CLABSI)over four years,its predicted risk factors,aetiology,and the antimicrobial susceptibility of the isolated pathogens.METHODS The study was a prospective case-control study,performed according to the guidelines of the Center for Disease Control surveillance methodology for CLABSI in patients admitted to the adult intensive care unit(ICU)and auditing the implementation of its prevention bundle.RESULTS Thirty-four CLABSI identified over the study period,giving an average CLABSI rate of 3.2/1000 central line days.The infection's time trend displayed significant reductions over time concomitantly with the CLABSI prevention bundle's reinforcement from 4.7/1000 central line days at the beginning of 2016 to 1.4/1000 central line days by 2018.The most frequently identified pathogens causing CLABSI in our ICU were gram-negative organisms(59%).The most common offending organisms were Acinetobacter,Enterococcus,and Staphylococcus epidermidis,each of them accounted for 5 cases(15%).Multidrug-resistant organisms contributed to 56%of CLABSI.Its rate was higher when using femoral access and longer hospitalisation duration,especially in the ICU.Insertion of the central line in the non-ICU setting was another identified risk factor.CONCLUSION Implementing the prevention bundles reduced CLABSI significantly in our ICU.Implementing the CLABSI prevention bundle is crucial to maintain a substantial reduction in the CLABSI rate in the ICU setting. 展开更多
关键词 Bloodstream infection central line Intensive Care Unit MICROBIOLOGY Prevention bundle kingdom of Bahrain
下载PDF
Anti-seismic Value of Watchtower-like Folk Residence on the Central Plain of China by the Insinuation of Typical Cases
5
作者 卢玫珺 郑智峰 李红光 《Journal of Landscape Research》 2012年第4期1-2,9,共3页
Through the survey of ancient residences on the Central Plain of China, several ancient residences have been selected as typical cases. By combining with residential features of watchtower, characteristics of these re... Through the survey of ancient residences on the Central Plain of China, several ancient residences have been selected as typical cases. By combining with residential features of watchtower, characteristics of these residences have been analyzed carefully. In order to reasonably illustrate anti-seismic value of watchtower-like residences, their characteristics have been concluded in the perspective of plane form, structural arrangement, and anti-seismic construction measures. The plane form is of tower; the plane and vertical surfaces are regular and even; the wall's thickness is reasonable, and doors and windows are few and small; and bonded stone has been set in the wall, resisting compression. 展开更多
关键词 central PLAIN Region WATCHTOWER ANTI-SEISMIC VALUE ANTI-SEISMIC construction Bonded stone
下载PDF
Late Quaternary Geomorphology of the Tonami Plain and Activity of the Tonami-Heiya Fault Zone, Toyama Prefecture, Central Japan
6
作者 Toshio Kamishima Akira Takeuchi 《International Journal of Geosciences》 2016年第7期962-976,共15页
The Holocene alluvial fans and flood plains formed by the Sho and Oyabe Rivers spread out in the Tonami plain from the central through the northern parts in the Toyama Prefecture, central Japan. Along the foot of the ... The Holocene alluvial fans and flood plains formed by the Sho and Oyabe Rivers spread out in the Tonami plain from the central through the northern parts in the Toyama Prefecture, central Japan. Along the foot of the surrounding mountains and hills, higher, middle and lower terraces of late Pleistocene-Holocene in age are distributed. These terraces have been displaced, by the reverse dip-slip activities of Tonami-heiya fault zone in a sense of upheaval in the mountains side, even during the Holocene time. We examined stratigraphic cross section utilizing borehole data and geomorphologically analyzed 5 m-DEM data in order to elucidate the fault trace of the Isurugi fault which Tonami-heiya fault zone. As the results, the northern segment of Isurugi fault seems to run along the northeastern foot of Hodatsu Hills and extends underground through the lower-most Oyabe River into the Toyama Bay. Consequently, its total length reaches about 30 km. In the southern segment, a continuous fault scarplet was recognized to cut across the lower dissected fans. The slip-rate of Isurugi fault is estimated to be 0.31 - 0.64 m/kyr. In the Hokuriku region, reverse faulting and related folding with strike in a NE-SW direction have occurred during the late Quaternary. The hinge line of block movement due to the activities of the Tonami-heiya fault zone is revealed to have shifted from the mountain side into the plain side within the Holocene time. In conclusion, the Quaternary folding and faulting associated with the crustal warping at a wavelength of about 20 km is currently in progress, causing both the subsidence of Tonami plain and the upheaval of surrounding mountains and hills. 展开更多
关键词 Tectonic Geomorphology Late Quaternary Active Fault Tonami Plain central Japan
下载PDF
The Evolution of the Central Plain Civilization in China(Ⅰ)
7
作者 Guo Feifei and Niu Aihong 《China & The World Cultural Exchange》 2012年第11期30-33,共4页
正China's Henan province, brief as Yu, got its name from the Yu state, which was one of the nine states in ancient China. The place with geographical advantage possesses superiority of radiating to the whole natio... 正China's Henan province, brief as Yu, got its name from the Yu state, which was one of the nine states in ancient China. The place with geographical advantage possesses superiority of radiating to the whole nation, and vibrant cultures, thus leading to its prosperity. The Xia, Shang and Zhou dynasties in ancient China set capitals in Luoyang of Henan province, 展开更多
关键词 the Evolution of the central Plain Civilization in China
下载PDF
Development Plan for Under- forest Economy of Henan Province Based on Central Plains Economic Region 被引量:3
8
作者 Xiaodong ZHAO Yimin ZHAO 《Asian Agricultural Research》 2016年第2期34-38,共5页
Firstly,this paper analyzed current situations,major practice and existing problems of under-forest economy in Henan Province.Then,it made an in-depth discussion of guiding thought,principle and objectives,constructio... Firstly,this paper analyzed current situations,major practice and existing problems of under-forest economy in Henan Province.Then,it made an in-depth discussion of guiding thought,principle and objectives,construction task and safeguarding measures of the underforest economic development plan. Besides,it analyzed benefits of the under-forest economic development plan. By 2017,the area of underforest economic land will reach 1. 60 million hm2,create output value of 155. 2 billion yuan( accounting for more than 20% of forest output value),provide 3. 27 million jobs,and will greatly increase ecological carrying capacity of construction and development of the Central Plains Economic Region( CPER). 展开更多
关键词 WORDS Under-forest ECONOMY Plan central plains Economic Region(CPER) Analysis HENAN PROVINCE
下载PDF
Spacial organization on the rural settlements in plain areas—taking Pinghu city in Zhejiang of China as an example
9
作者 XUE Dong-qian1, YAO Shi-mou2, ZHANG Hong1 (1. Dept. of Tourism and Environment, Shaanxi Normal University, Xi’an 710062, China 2. Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing 210008, China) 《Journal of Geographical Sciences》 SCIE CSCD 2000年第3期59-64,共2页
This paper analyses the spacial distribution, quantity-scale, function-structure and facilities from the angle of spacial organizational optimizing theory and sustainable development thought. The authors point out the... This paper analyses the spacial distribution, quantity-scale, function-structure and facilities from the angle of spacial organizational optimizing theory and sustainable development thought. The authors point out the distributional principles of rural settlements in plain areas, and put forward planning and distribution of various levels of rural settlements (central villages, basic villages and natural villages). 展开更多
关键词 plain area central villages basic villages natural villages spacial organization
下载PDF
Evaluation on Emergency Ability of Agricultural Envrironmental Pollution Incident in Central Plains Economic Zone
10
作者 Chuai Xiaoming Yang Xiaoer +1 位作者 Zhou Haixia Zhang Yongling 《Meteorological and Environmental Research》 CAS 2015年第3期15-18,共4页
Abstract The level of emergency ability directly reflects response effect of an area to emergency. Taking Central Plains Economic Zone as re- search object, by documents retrieval, field survey, mechanism analysis and... Abstract The level of emergency ability directly reflects response effect of an area to emergency. Taking Central Plains Economic Zone as re- search object, by documents retrieval, field survey, mechanism analysis and logical reasoning, evaluation index system for emergency ability of ag- ricultural environmental pollution incident was established, which included 5 first grade indexes, 19 second grade indexes and 53 third grade inde- xes. By mechanism analysis and mathematical derivation, evaluation model for emergency ability of agricultural environmental pollution incident: I =m∑i=1∑j=1Pij, On this basis, four prefecture-level cities (A, B, C and D) of Central Plains Economic Zone were evaluated by using the index system and the evaluated model. The research could provide important theoretical reference for emergency ability construction of agricultural environmental pol- lution incident in Central Plains Economic Zone. 展开更多
关键词 central plains Economic Zone Agricultural environmental pollution incident Emergency ability EVALUATION China
下载PDF
Spatial Heterogeneity Analysis of PM2.5 Concentration in Central Plains Economic Region
11
作者 Kaiguang Zhang Hongling Meng +1 位作者 Mingting Ba Yanmin Sun 《Journal of Geoscience and Environment Protection》 2020年第12期244-254,共11页
The research of the spatial heterogeneity of PM2.5 concentration in an area, is of great significance for understanding its regional spatial distribution structure, exploring the transmission relationship between regi... The research of the spatial heterogeneity of PM2.5 concentration in an area, is of great significance for understanding its regional spatial distribution structure, exploring the transmission relationship between regions, in order to formulate joint prevention and control measures within the entire area. Based on the daily monitoring data of PM2.5 concentration in the Central Plains Economic Region in 2019, this paper utilizes cluster analysis to divide the regional PM2.5 concentration into 5 classes, builds their spatial semi-variogram model, and then utilizes interpolation analysis method to study the regional overall distribution characteristics and transmission law. The results show that the PM2.5 concentration in the Central Plains Economic Region has a medium or higher spatial autocorrelation. The critical value of the overall PM2.5 concentration in the area is 150 μg/m3, as the overall PM2.5 concentration less than the value, the PM2.5 in a region mainly comes from local emissions, as the overall PM2.5 concentration higher than the value, the influence of spatial structure on the distribution of PM2.5 concentration is gradually obvious. PM2.5 has a certain degree of spatial transmission, which mainly includes two routes as Puyang-Xingtai and Puyang-Zhengzhou, and the transmission intensity of the former is greater than the latter. 展开更多
关键词 Cluster Analysis Semi-Variogram Spatial Heterogeneity Spatial Structure central plains Economic Region
下载PDF
Soft Sediment Deformation Structures in the Sediment Deposits of Ganga River and Its Oxbow Lakes in Parts of Indo-Gangetic Plain: Implications for Quake Proxies and Paleoseismicity Tracking
12
作者 Gufran Ali Mohd Sajid Mohammad Shamim Khan 《International Journal of Geosciences》 CAS 2023年第1期75-93,共19页
The Late Quaternary thick sedimentary fills of the Ganga basin predominantly consist of unconsolidated fluvial sandy deposits which are often intercalated with mud. These deposits at various places record the evidence... The Late Quaternary thick sedimentary fills of the Ganga basin predominantly consist of unconsolidated fluvial sandy deposits which are often intercalated with mud. These deposits at various places record the evidence of earthquakes, which occurred in the recent geological past. The evidence is contained and manifested in the form of Soft Sediment Deformation Structures (SSDSs). Saturated sediments/muds/soils are liquefied by earthquake tremors which either generate SSDS or produce structural discordance in the pre-existing sedimentary structures. The present study reports the occurrence of SSDS, e.g. load and associated flame structures, clastic dikes and sill structures, slump structures and sedimentary breccias, etc. from the Ganga River and adjacent oxbow lake sediment deposits. An attempt has been made to establish the origin of soft sediment structures of this region in accordance with its neotectonic history and in turn, identification of seismic structural proxies to delineate paleoseismic events in this region with futuristic implications. The preservation of soft sediment deformation structures in large numbers with multiple geomorphology and scale, in the river and adjoining lake sediments, is indicative of frequent earthquakes of high magnitude consequent to tectonic activism in the Himalayan region. 展开更多
关键词 Quaternary Sediments Flood Plain central Ganga Basin Sediment Dynamism Himalayan Uplift Paleoquakes
下载PDF
Spatio-temporal Evolution of Urban Expansion Based on a Novel Adjusted Index and GEE: A Case Study of Central Plains Urban Agglomeration, China
13
作者 SU Yanlin LU Chunyan +3 位作者 SU Yue WANG Zili HUANG Yufei YANG Nuocheng 《Chinese Geographical Science》 SCIE CSCD 2023年第4期736-750,共15页
It is crucial to investigate the urban agglomerations spatio-temporal evolution patterns and driving factors for analyzing the urban spatial structure-functional division and promoting the coordinated development of u... It is crucial to investigate the urban agglomerations spatio-temporal evolution patterns and driving factors for analyzing the urban spatial structure-functional division and promoting the coordinated development of urban agglomerations.In this study,a novel vegetation-building-nighttime light-adjusted index(VBNAI)was established for rapid and effective mapping of urban construction land(UCL)in Central Plains Urban Agglomeration(CPUA),China during 2000–2020 based on Google Earth Engine(GEE)platform.Compared with traditional indices,VBNAI can significantly decrease the blooming effect,Normalized Difference Vegetation Index(NDVI)saturation,and soil background of nighttime light data.In addition,the urban expansion indices and standard deviation ellipse model were synthetically adopted to analyze the spatio-temporal evolution pattern of urban expansion.The gravity model and the geographically weighted regression model were employed to determine the spatial interaction forces and drivers of urban expansion,respectively.The results showed that the VBNAI index has obvious advantages in efficiency and accuracy to extract UCL with the overall accuracy of more than 91%.The UCL of CPUA had increased by 4489.84 km2 during 2000–2020 with the gravity center moving towards southeast continuously.From 2000 to 2010,the urban expansion was in a‘center-hinterland’pattern which had benefit from the favorable effect of the traffic shaft belt.During 2010–2020,the urban network structure had basically established.Urban expansion had been influenced by a variety of socio-economic and demographic factors,and the impact degree varied from region to region.This study could provide scientific references for facilitating the intensive utilization of urban resources and optimizing the spatial development pattern of urban agglomeration. 展开更多
关键词 urban expansion urban construction land(UCL)mapping vegetation-building-nighttime light-adjusted index(VBNAI) multi-source remote sensing Google Earth Engine(GEE) central plains Urban Agglomeration(CPUA) China
下载PDF
Hydrogeochemical and Isotopic Study of Groundwater in a Semi-arid Region: Yeniceoba Plain (Cihanbeyli-KONYA), Central Anatolia,Turkey 被引量:1
14
作者 Ayla BOZDAG Guler GOGMEZ 《Acta Geologica Sinica(English Edition)》 SCIE CAS CSCD 2016年第1期230-241,共12页
Groundwater is the most important source of water supply in the Yeniceoba Plain in Central Anatolia, Turkey. An understanding of the geochemical evolution of groundwater is important for the sustainable development of... Groundwater is the most important source of water supply in the Yeniceoba Plain in Central Anatolia, Turkey. An understanding of the geochemical evolution of groundwater is important for the sustainable development of water resources in this region. A hydrogeochemical investigation was conducted in the Plio-Quaternary aquifer system using stable isotopes (δ^18O and JD), tritium (3H), major and minor elements (Ca, Na, K, Mg, C1, SO4, NO3, HCO3 and Br) in order to identify groundwater chemistry patterns and the processes affecting groundwater mineralization in this system. The chemical data reveal that the chemical composition of groundwater in this aquifer system is mainly controlled by rock/water interactions including dissolution of evaporitic minerals, weathering of silicates, precipitation/dissolution of carbonates, ion exchange, and evaporation. Based on the values of C1/Br ratio (〉 300 mg/l) in the Plio-Quaternary groundwater, dissolution of evaporitic minerals in aquifer contributes significantly to the high mineralization. The stable isotope analyses indicate that the groundwater in the system was influenced by evaporation of rainfall during infiltration. Low tritium values (generally 〈1 tritium units) of groundwater reflect a minor contribution of recent recharge and groundwater residence times of more than three or four decades. 展开更多
关键词 HYDROCHEMISTRY stable isotopes tritium Yeniceoba Plain central Anatolia
下载PDF
Historical experience in the elimination of visceral leishmaniasis in the plain region of Eastern and Central China 被引量:15
15
作者 Li-Ren Guan Zhong-Xing Wu 《Infectious Diseases of Poverty》 SCIE 2014年第1期81-91,80,共12页
Visceral leishmaniasis(VL)(kala-azar)was most seriously prevalent in the plain regions of eight provinces/municipalities in the eastern and central parts of China.In the early 1950s,the number of counties/cities endem... Visceral leishmaniasis(VL)(kala-azar)was most seriously prevalent in the plain regions of eight provinces/municipalities in the eastern and central parts of China.In the early 1950s,the number of counties/cities endemic for VL and the number of cases in the plain regions accounted for 60%and 80%,respectively,of the total numbers in the entire country.By implementing comprehensive control measures,including treatment of patients for eliminating the source of infection and spraying insecticide in endemic villages to kill sandflies,VL transmission has been brought under control in this region by the early 1960s,and no new infected cases have been found since 1983,achieving the goal of eliminating VL. 展开更多
关键词 Visceral leishmaniasis ELIMINATION Plain region Eastern and central China
原文传递
Testing optically stimulated luminescence dating on sand-sized quartz of deltaic deposits from the Sperchios delta plain, central Greece 被引量:2
16
作者 Evangelos Tsakalos Elias Dimitriou +3 位作者 Maria Kazantzaki Christos Anagnostou John Christodoulakis Eleni Filippaki 《Journal of Palaeogeography》 SCIE CSCD 2018年第2期130-145,共16页
This study reports on the first investigation into the potential of luminescence dating to establish a chronological framework for the depositional sequences of the Sperchios delta plain, central Greece. A series of t... This study reports on the first investigation into the potential of luminescence dating to establish a chronological framework for the depositional sequences of the Sperchios delta plain, central Greece. A series of three borehole cores(20 m deep) and two shallow cores(4 m deep), from across the delta plain, were extracted, and samples were collected for luminescence dating. The luminescence ages of sand-sized quartz grains were obtained from small aliquots of quartz, using the Single-Aliquot Regenerative-dose(SAR) protocol.The equivalent dose determination included a series of tests and the selection of the Minimum Age Model(MAM) as the most appropriate statistical model. This made it possible to confirm the applicability of quartz Optically Stimulated Luminescence(OSL) dating to establish absolute chronology for deltaic sediments from the Sperchios delta plain.Testing age results of the five cores showed that the deltaic sediments were deposited during the Holocene.A relatively rapid deposition is implied for the top14 m possibly as a result of the deceleration in the rate of the sea-level rise and the transition to terrestrial conditions, while on the deeper parts, the reduced sedimentation rate may indicate a lagoonal or coastal environment. 展开更多
关键词 Luminescence dating HOLOCENE Sedimentation rates Deltaic deposits Sperchios delta plain central Greece
原文传递
Application research of enhanced in-situ micro-ecological remediation of petroleum contaminated soil 被引量:2
17
作者 ZHANG Sheng ZHANG Cui-yun +6 位作者 HE Ze CHEN Li ZHANG Fa-wang YIN Mi-ying NING Zhuo SUN Zhen-hua ZHEN Shi-jun 《Journal of Groundwater Science and Engineering》 2016年第3期157-164,共8页
Experimental study of enhanced in-situ micro-ecological remediation of petroleum contaminated loess soil was carried out in Zhongyuan oil production areas, and the enhanced in-situ micro-ecological remediation techniq... Experimental study of enhanced in-situ micro-ecological remediation of petroleum contaminated loess soil was carried out in Zhongyuan oil production areas, and the enhanced in-situ micro-ecological remediation technique includes optimistic in-situ microbial communities, physical chemistry methods, alfalfa planting and regulation of soil environmental elements. Experiments showed that the oil content in the contaminated soil with oil content about 2 898.25 mg/kg can be reduced about 98.61% after in-situ micro-ecological remediation for 99 days, which demonstrated the effectiveness of in-situ micro-ecological remediation methods for petroleum contaminated soil in central plains of China, and explored the practical and feasible application of these methods. 展开更多
关键词 central plains Oil contamination Enhanced in-situ Micro-ecological remediation
下载PDF
Application of bioremediation in oil contaminated soil 被引量:1
18
作者 ZHANG Sheng ZHANG Cui-yun +6 位作者 HE Ze CHEN Li YIN Mi-ying NING Zhuo SUN Zhen-hua ZHEN Shl-jun ZHANG Fa-wang 《Journal of Groundwater Science and Engineering》 2017年第2期116-123,共8页
The long-term oil exploitation in oil fields has led to pollution of surrounding soil, creating a serious ecological problem. In order to promote and improve the application of microbial remediation in oil contaminate... The long-term oil exploitation in oil fields has led to pollution of surrounding soil, creating a serious ecological problem. In order to promote and improve the application of microbial remediation in oil contaminated soil, experiment is carried out in polluted area in Zhongyuan Oilfield. In the experiment, indigenous microorganisms and other physical and chemical methods are employed, ryegrass is grown, and environmental factors in soil are regulated to degrade the oil and treat the polluted soil. Results show that when the average oil content in the soil is about 523.08 mg/kg, 65 days' remediation through plants and microorganisms could help bring the oil content down to 74.61 mg/kg, achieving a degradation rate of 85.74%; through salinity treatment, salt content in soil is reduced by 62.93-82.03% to 399-823 mg/kg from previous 2.22 g/kg. Through this experiment, the bioremediation method is improved and its effectiveness and feasibility are testified. The result has been applied in Zhongyuan Oilfield and has brought fair ecological and economic benefits, providing technical support to the treatment of contaminated soil of the same kind, and offering some insights to the treatment of soil contaminated by other organic pollutants. 展开更多
关键词 central plain Oil contaminated soil BIOREMEDIATION APPLICATION
下载PDF
Morphometric Assessment of Meandering River in Arid Region Using Improvement Model (Case Study: Maroon River)
19
作者 Mehran Maghsoudi Seyyed Mohammad Zamanzadeh +1 位作者 Mojtaba Yamani Abdolhossein Hajizadeh 《Journal of Water Resource and Protection》 2017年第4期358-377,共20页
To understand the natural environments of drylands, deserts, arid and semi-arid regions of the earth is to understand the processes and forms of their rivers. One of the river studies and fluvial processes are morphom... To understand the natural environments of drylands, deserts, arid and semi-arid regions of the earth is to understand the processes and forms of their rivers. One of the river studies and fluvial processes are morphometry analyses. The channel forms in an alluvial plain reflecting the movement of water and the particle size of the load flowing down the channel. The dynamics of channel change has led to conflict with human resource development. Three basic channel patterns are detected in the region. They are braided, meandering and straight. In this research for assessment of meandering Maroon River, we used DEM (Digital Elevation System), Topography maps, Arc GIS software, Google earth, field work and library studies and mathematic formula. The two general indices for analyzing meandering patterns are 1) sinuosity coefficient 2) central angle. In this paper, the authors were used these factors and improved them. One of the results is creation of direction index and the second result is the Maroon River which has a type of sinuosity in any reach. 展开更多
关键词 Iran Maroon RIVER MEANDERING RIVERS SINUOSITY Coefficient central Angle Direction Index Behbahan PLAIN
下载PDF
Development of a Three-Layer Steady State Vertical Dissolved Oxygen Model in Grand Lake, Oklahoma
20
作者 Josephus F. Borsuah Scott Stoodley +2 位作者 Daniel Storm Andrew Dzialowski Andrew Stoddard 《Natural Resources》 2018年第12期448-467,共20页
Grand Lake O’The Cherokees, the third largest reservoir located in northeastern Oklahoma, provides recreational services, water supply, hydroelectric power, and flood control to residents of Oklahoma and neighboring ... Grand Lake O’The Cherokees, the third largest reservoir located in northeastern Oklahoma, provides recreational services, water supply, hydroelectric power, and flood control to residents of Oklahoma and neighboring states. Grand Lake has experienced major problems?with eutrophication, harmful algal blooms, and dissolved oxygen (DO) depletion during summer. To better understand the dynamics of DO depletion in the hypolimnion of Grand Lake, a three-layer steady state vertical DO model for summer-stratified conditions was used to investigate dissolved oxygen profiles both above and below the thermocline. The DO model was used to determine the relative effects of atmospheric reaeration and phytoplankton production as a source of DO and phytoplankton respiration, decomposition of organic matter, and nitrification as loss terms for DO. Additionally, the importance of sediment oxygen demand (SOD) for hypolimnetic oxygen depletion was investigated at the sediment water-interface under stratified conditions. Observed water quality data, kinetic coefficients from the literature, and physical, biological, and chemical data collected throughout 2013 and 2015 along the spatial gradient of riverine, transition, lacustrine zones and a site close to the Grand Lake Pensacola Dam were used?in the pre-processing calculations to derive estimates of kinetic rates as input parameters to the model. The estimated predictions from the model showed reasonable agreement with the observed vertical profiles of DO. Conclusions from this study indicate that phytoplankton production, high light limitation, and phosphorus were the major terms that controlled DO production in the surface layer, while nitrification and organic carbon decomposition were the major sinks of DO consumption in the bottom layer. Interestingly, SOD did not play a significant role in DO depletion in the water column. 展开更多
关键词 EUTROPHICATION DO Depletion Primary Production MODEL NUTRIENTS Reservoir Hypolimnion central plains
下载PDF
上一页 1 2 98 下一页 到第
使用帮助 返回顶部