太湖流域南河水系无尺度结构

基于图论和无尺度结构视角及节点度指标初步探讨太湖流域南河水系结构的数量特征和空间秩序,为辨识和模拟流域水文情势提供重要参数.主要结论如下:太湖流域南河水系结构的数量节点度不符合幂次分布,而长度和等级节点度符合无尺度结构;南河水系结构符合Horton第一定律和第二定律,同时此类特征亦符合无尺度结构,但指数函数回归模拟的R2相比乘幂函数回归模拟的R2较低;由幂次定律所支配的这种水系网络特征状况是由地区地形、农业灌溉、圩区建设和城市化过程共同推动;从节点度角度看,南河下游圩区使得河网数量节点度增加,等级节点度和长度节点度降低.

南河水电厂机组的增容改造

南河水电厂的三台水轮发电机组是天津发电设备总厂生产的,相继于1980年投产运行,机组的主要参数如下: a.水轮机 型号:HL365—LJ—230;最大水头:31.5m;设计水头:26.0m;额定出力:7800kW;额定流量:37.4m^3/s;额定转速:187.5r/min。

南河水电厂水轮机导水机构连杆装置改造

水轮机导水机构刚性连杆装置的剪断销容易被堵塞物卡断,造成事故。改用弹簧连杆取代刚性连杆后,收到良好效果,详情予以介绍。

弹性金属氟塑料瓦在南河水电厂的应用简介

南河水电厂2号水轮发电机组的推力瓦改换为塑料瓦运行试验表明,换瓦效果明显,可供类似情况参考。

Countermeasures for Treatment in Water Environment of Nanfeihe River

According to current situation of the severe water pollution and bad water environment of Nanfeihe River catchment, the major environment problems were id- entified based on the investigation and analysis of the general situation of the catch- ment, the present situation of water quality and water volume composition, corre- sponding countermeasures were put forward to provide a reliable theoretical support for controlling pollution in water environment of Nanfeihe River.

Vegetation Influence Investigation of GangnanHuangbizhuang Reservoir Downstream River and Recovery Strategies

The research selected three typical areas for plant investigation, including upper reaches of Gangnan Reservoir, the area between Gangnan and downstream of Huangbizhuang Reservoir, and Huangbizhuang Reservoir. The results showed that affected by water, plant species, species diversity and species richness were all decreasing in varying degrees as the distance with watercourse upper reaches was increasing, but the ratio of Anthropochory plants was growing. The research finally proposed countermeasures, including increasing wetland area, constructing forests and artificial water landscape of Hutuo River and reinforcing watercourse compre- hensive management.

南河“小三峡”

南河"小三峡",位于武当山东南麓,襄阳古隆中西南部,谷城西南22公里处,与"中国南避暑山庄大薤山"毗邻,面积178.2平方公里。此处因山水奇异,风景秀丽而享誉鄂西北,素有"小三峡"之称。南河山清水秀,自然景观达100多处。海拔1000多米的五龙山巍峨壮观,景色奇丽,谓之风水宝地。晴日可揽武当胜景。

“数字”见证

58条建议,109件实事,13项制度绘就了代表的履职轨迹,是近几年璧山区青杠代表小组活动最有力的证据。在璧山区青杠代表小组近年来的档案里,有这样一组数据较为醒目:2012年提出代表建议24条,2013年提出10条;2014年提出11条,加上2015年年初提出的13条,代表建议共计58条。这些数字,看似枯燥、乏味,但真实记录着壁山区十六届人大青杠代表小组的履职,是15名区人大代表用行动演绎出的一个个跳跃音符,在四万青杠人的心底奏响了一曲曲动人的"代表情"歌。

陕西省人民政府关于禁止在延安黄河引水工程占地和淹没区新增建设项目和迁入人口的通告

陕政发[2012]44号延安黄河引水工程自延川县黄河干流引水,主要由输水管线、抽水泵站、净水厂以及南河、康家沟两座调蓄水库组成,沿途向延安市城区、延川县、延长县、子长县供水,并为榆林市清涧县预留供水条件。为了保障延安黄河引水工程前期工作顺利推进,根据《大中型水利水电工程建设征地补偿和移民安置条例》(国务院令第471号)有关规定,通告如下:

湖南省水力发电工程学会举办大坝及基础安全监测技术研讨会

湖南省水力发电工程学会于1990年10月17日至20日,在长沙举办了大坝及基础安全监测技术研讨会,到会的单位有上犹江水电厂、东江水电厂、凤滩水电厂、黄龙滩水电厂,白渔潭水电厂、南河水电厂、沙田水电厂、井岗冲水电工程指挥部、水府庙水电厂、欧阳海水电工程管理局、酒埠江水电厂、中国新技术创业产业有限公司、中国华能地学高技术联合公司、国家地震局地壳应力研究所、中南勘测设计院勘测公司、中南勘测设计院水工处、中南勘测设计院地质大队、中南勘测设计院测量队等单位共40位同志,其中有领导、专家、教授和在大坝及基础安全监测第一线工作的科技工作者,出席了研讨会。

Influences of Soil Physical Properties on Water-Supplying Capacity

The water-supplying capacity of two agricultural soils, red soil in Jiangxi Province and meadow soil in Henan Province, was assessed mainly using physical investigations. The reticulated mottting horizon in the red soil was a horizon limiting roots distribution due to its high density and hardness in structure and low pH (pH 5.05). The resistance of the red soil to drought hazard was poor because of its low water-supply capacity and poor hydraulic conductivity. The meadow soil had superior profile infiltration to that of the red soil and great available water-storage capacity) which resulted in low run-off loss, especially in the wheat-growth season. It was difficult for water stored in the deep layers of the meadow soil to reach the surface due to the low unsaturated hydraulic conductivity of its clay-rich horizon in subsoil. However, water stored in deep layers was still available because the roots could extend to the deep layers due to the relatively low density in soil structure.

Study on Rational Irrigation for Wheat Production in Fengqiu Region: Ⅰ. Analysis of the Relation Between Soil Water Supply and Wheat Yield

A 5-year experiment on water balance was conducted in a flat rainfed wheat field with an area of 66 m×100 m in Fengqiu, Henan Province, China. Results of the experiment showed that the correlation between wheat yield and water consumption was not significant, but that between wheat yield and the ratio of water supply to Penman evaporation was significant, following a parabolic curve. The water consumption process,as well as the growing season of wheat plant, could be divided into three periods. The first (154 days) was vegetative growth period, during which the water consumption accounted for 35% of the total; the second (65 days) reproductive growth period, during which the water consumption occupied 57%, indicating the importance of water consumption in this period; and the third (5~9 days) maturation period, during which water supply was not important to yield formation. According to the statistics of meteorological data over the years in this region, the hydrological conditions of the five seasons covered a probability range of 74.8%.The results (3.46~5.63 t ha-1) indicated that the productivity of the wheat field under rainfed conditions in this region had a degree of confidence of 74.8%.

Predicting landslide scenes under potential earthquake scenarios in the Xianshuihe fault zone, Southwest China

Earthquake-induced landslides can seriously aggravate the earthquake's destructive consequences and have caused widespread concern in recent decades. The Xianshuihe fault is a large active left-lateral strike-slip fault in the southeast margin of Qinghai-Tibet Plateau, Southwest China, where the frequent strong earthquakes have brought abundant geo-hazards. This study focuses mainly on exploring and predicting the landslide scenes induced by the potential earthquakes. Firstly, the sophisticated Newmark model is improved through landslide cases induced by the Ms7.9 Luhuo earthquake in 1973 to adapt the field seismotectonics of the Xianshuihe fault zone. Then, it is used to predict the landslide scenes under one speculated potential earthquake scenario with the similar focal mechanism with the Luhuo earthquake. The preliminary results show that the slope displacement resulted from Newmark model can reflect spatial distribution characteristics ofearthquake-induced landslides. The predicted potential earthquake-induced landslide scenes present an obvious extending trend along the Xianshuihe fault. The landslide hazard is greater in the northeast regions than southwest regions of the Xianshuihe fault, where there are more complex topographic conditions. The study procedure will be a helpful demonstration for exploration and prediction of landslide scenes under potential earthquakes in the regions with high seismic activity.

Mineral distributions in surface sediments of the western South Yellow Sea:implications for sediment provenance and transportation

The South Yellow Sea(SYS) is strongly influenced by the substantial sediment loads of the Huanghe(Yellow)(including the modern Huanghe and abandoned old Huanghe subaqueous delta) and Changjiang(Yangtze) Rivers. However,the dispersal patterns of these sediments,especially in the western SYS,have not been clearly illustrated. In this study,we have analyzed clay minerals,detrital minerals,and grain sizes for 245 surface sediment samples(0–5 cm) collected from the western SYS. The clay minerals,on average,consist of 67% illite,14% smectite,11% chlorite,and 8% kaolinite. Clay minerals,detrital minerals,and grain size analyses of surface sediments,combined with water mass hydrology analysis,reveal that sediments in the western SYS are mainly derived from the modern Huanghe River,the abandoned subaqueous delta of the old Huanghe River,some material from the Changjiang,and coastal erosion. The clay minerals(especially illite and smectite) and quartz/feldspar ratio distribution patterns,reveal that the influence of modern Huanghe sediments can reach 35°N in the northwestern part of the study area,an influence that can be enhanced especially in winter owing to northerly winds. Conversely,sediments along the Jiangsu coast are mixed,in summer,with material from the Changjiang arriving via northward flow of Changjiang Diluted Water. The Subei Coastal Current carries the refreshed sediments northward into the western SYS. Sediment distribution and transport in the western SYS are mainly controlled by the oceanic circulation system that is primarily related to the monsoon.

Agricultural water-saving potential and feasibility of developing semi-dryland farming in Henan Province

Based on the collected data in the current status of developing and utilizing water resources and imple- menting water-saving agriculture in Henan Province, and taking into account the influence of engineering, agro- nomic and management measures, the water-saving potential in past years and the feasibility of implementing semi-dryland farming were analyzed in Henan Province. Finally, specific technical measures of developing semi- drvland farming in different areas of Henan Province were orooosed.

Study on Establishing a Monitoring System for Groundwater in the Condition of Climate Change and Sea Level Rise： Case Study of Ma River Basin in Vietnam

The results presented in this paper are a part of the research results of the thesis ＂research on scientific basis and practice of develop a system of monitoring the impacts of climate change on surface water and groundwater＂. Case study： Ma river basin in Vietnam. The results were implemented： （i） data collection, fieldwork survey, synthesis and analysis of information and data; （ii） partitioning the influence degree of climate change and sea level rise to groundwater; （iii） determining criteria to select monitoring routes, location of monitoring groundwater in the condition of climate change and sea level rise and （iv） developing the monitoring system. The research＇s results have practical implications for the water resources management in the context of climate change and sea level rise in Ma river basin.

Diagenetic evolution and its effect on reservoir-quality of fan delta sandstones during progressive burial: Evidence from the upper part of the fourth member of Shahejie formation, Bonan sag, Jiyang depression

Petrographic analysis combined with various techniques, such as thin section identification, fluid inclusions, isotopic data, petro-physical property testing and oil testing results, was used to study diagenetic evolution and its effect on reservoir-quality of fan delta reservoirs of Es4s in the Bonan sag. The diagenesis is principally characterized by strong compaction, undercompaction, multi-phase of dissolution and cementation. Compaction played a more important role than cementation in destroying the primary porosity of the sandstones. The reservoirs have experienced complicated diagenetic environment evolution of "weak alkalineacid-alkalinity-acid-weak alkalinity" and two-stage of hydrocarbon filling. The diagenetic sequences are summarized as "early compaction/early pyrite/gypsum/calcite/dolomite cementation→feldspar dissolution/the first stage of quartz overgrowth → early hydrocarbon filling→quartz dissolution/anhydrite/Fe-carbonate cementation→Fe-carbonate dissolution/feldspar dissolution/ the second stage of quartz overgrowth→later hydrocarbon filling→later pyrite cementation. In the same diagenetic context, the diagenetic evolution processes that occurred in different sub/micro-facies during progressive burial have resulted in heterogeneous reservoir properties and oiliness. The braided channel reservoirs in fan delta plain are poorly sorted with high matrix contents. The physical properties decrease continually due to the principally strong compaction and weak dissolution. The present properties of braided channel reservoirs are extremely poor, which is evidenced by few oil layers developed in relatively shallow strata while dry layers entirely in deep. The reservoirs both in the underwater distributary channels and mouth bars are well sorted and have a strong ability to resist compaction. Abundant pores are developed in medium-deep strata because of modifications by two-stage of acidic dissolution and hydrocarbon filling. The present properties are relatively well both in the underwater distributary channels and mouth bars and plenty of oil layers are developed in different burial depth. The present reservoir properties both in interdistributary channel and pre-fan delta are poor caused by extensively cementation. Small amounts of oil layers, oil-water layers and oil-bearing layers are developed in relatively shallow strata while dry layers totally in deep.

Study on the Distribution of Migrant Workers＇ Employment Destinations A Case Study of Henan Province, China

The choice of employment destination is the basis of migrant workers＇ spatial flow, the study on the choice of employment destination is helpful to understand the spatial law of migrant workers＇ flow from a micro perspective. Through the case study on 11 sample villages generated by the random stratified sampling in Henan Province, authors of this paper find that the distribution of destinations is dispersed in a large area while concentrated in certain places. Most of the destinations are in counties and outside Henan Province. Migrant workers are mainly concentrated in the economically more developed eastern provinces. The central, though a big source of migrant workers, has not formed a core employment area for migrant workers. The main factors influencing migrant workers＇ choice of employment distances include age, family size, per capita arable land, the village＇s economic development level, the village terrain, transportation, its distance from the nearest city, and workers＇ relationship networks. From the perspective of employment destinations, on a provincial scale, the employment attraction coefficient based on the destination＇s level of economic development and the employment distance, efficiently explains farmers＇ choice of destinations, that is, destinations with a more developed economy and a shorter employment distance are the top choice for migrant workers.

Water Conservancy and the Historical Evolvement of Lingnan Regional Culture

The history of the formation and development of Chinese civilization is also a civilization history of water conservancy. Water not only gives birth to Chinese civilization but also gives birth to the unique regional culture in Lingnan. In the past thousands of year, from the ancient myths and legends of Lingnan water conservancy culture to the digging of efficacious Canal＇s integration of the nationalities in Lingnan, to the blending of water and culture of the Xijiang River and the North River of the Zhujiang water system and the formation of urban river culture, development of its generation, deduction and inheritance has the mutual penetration with the formation of water system and the variation of water conservancy which mutually influence the historical evolvement of Lingnan regional culture.

Relationship between Hydrogeological Structure and Groundwater Exploitation Capacity in Aquifer of the Basin of Cai Phan Rang River, Ninh Thuan Province, Viet Nam

This article presents the results of dividing the hydrogeological structure zones in aquifer of Cai Phan Rang river basin, Ninh Thuan province, Viet Nam, and the relationship between parameters of hydrogeological structure zones with water storage capacity of hydrogeological structure. Research results divided hydrogeological structure of Cai Phan Rang River Basin into four zones, including three zones with depression bedrock and one zone with slope bedrock, and the results assessed： （1） specific discharge of exploitation well is proportional to zone area of hydrogeological structure; （2） specific discharge of exploitation well is inversely proportional to slope of bedrock surface, slope of water level in zone and area of drainage surface of hydrogeological structure zone; （3） water level fluctuation in zone is proportional to slope of bedrock surface, slope of water level in zone and inversely proportional to distribution area of zone; （4） total mineralization of water is proportional to bedrock surface slope and water level slope in zone, and inversely proportional to drainage surface area of zone and volume of structural depression. Research results are practical significance in solutions proposal to increase exploitation capacity for various water use purposes.