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| 1 | 我国城市供水水质指数与信息公开制度探讨显示文摘 | 袁志彬 | 2005 | 中国公共卫生2005,21,2: | 23 |
| 2 | 江水源热泵系统温排水对江水水温及水质的影响显示文摘针对江水源热泵系统取水量大可能对江水水质产生影响的问题,以嘉陵江重庆主城段水体为研究对象,采用物理模拟的方法对江水源热泵系统温排水进行了系统的试验研究.结果表明,温排水对排放口近水域水温和水质均有一定程度的影响.在模拟大型江水源热泵系统运行工况的条件下,温排水导致排放口附近水域水温上升约3.3℃,间歇运行时水温能得到有效恢复;温排水导致排放口局部水域溶解氧降低8%~12%;并能加快水中营养物质的循环,从而使水体的高锰酸盐指数升高;温排水有利于水体中的有机氮转化为氨氮,加速氮循环,从而使水体氨氮和总氮含量升高,但对总磷影响不显著. | 黄向阳 谢磊 | 2010 | 水电能源科学2010,28,7: | 9 |
| 3 | DYNAMIC VARIATIONS OF WATER QUALITY IN TAIHU LAKE AND MULTIVARIATE ANALYSIS OF ITS INFLUENTIAL FACTORS显示文摘Dynamic variation of water quality in Meiliang Bay and part of West Taihu Lake has been analysed based on data from 1991 to 1992. Principal Component Analysis is used to reveal the mutual relationships of various factors. It is shown that there existis an obvious spatial and temporal variation in the main factors of water quality. Annual values of TP, CON, TN, Chl-a and conductivity decrease evidently from inner Meiliang Bay to the outer from north to south. TP and TN fluctuate seasonally with much higher value in winter. This is particularly true for the mouth of Liangxi River. In addition, the Chl-1 has a synchronous variation with water temperature, although being lagged a little, and closely relates to TP and TN. Finally, the results from Principal Component Analysis show that TP, TN, SS (or SD), water temperature and Chl-a are the most influential factors to water qualuty in this area, and both suspensions and algae can contribute to transparency to Taihu Lake. | Cai Qiming Gao Xiyun Chen Yuwei Ma Shengwei Nanjing Institute of Geography and Limnology, CAS, Nanjing 210008 People’s Republic of ChinaMartin Dokulil Institute of Limnology, Austria | 1997 | Journal of Geographical Sciences1997,7,3: | 9 |
| 4 | 山东省蔬菜产地灌溉水重金属环境质量分析与评价(摘要)(英文)显示文摘[目的]评价山东省蔬菜基地灌溉水重金属环境质量。[方法]对山东省主要蔬菜产地的灌溉水进行了重金属Hg、Cd、As、六价Cr、Pb、Cu和Zn含量的抽样调查分析,并采用单项质量指数与综合质量指数相结合的方法对重金属的环境质量状况进行了评价。[结果]寿光、莱阳、金乡和章丘4个蔬菜产地灌溉水中各重金属的平均含量均远低于《食用农产品产地环境质量评价标准》(HJ332-2006)规定的限值,未发现重金属含量超标现象;4地灌溉水重金属的单项质量指数均小于0.5,综合质量指数分别为0.3178、0.3204、0.2326和0.2607,灌溉水环境质量均为1级。[结论]4个蔬菜产地的灌溉水环境质量属于清洁水平,适宜作为无公害蔬菜的灌溉用水。 | 刘苹 魏建林 于淑芳 杨力 Jian-lin Shu-fang | 2010 | Agricultural Science & Technology2010,11,5: | 7 |
| 5 | Irrigation ponds:Possibility and potentials for the treatment of drainage water from paddy fields in Zhanghe Irrigation System显示文摘Excessive application of fertilizers and pesticides as well as discharge of undecontaminated and unrecycled waste of livestock and poultry into farmland has caused serious non-point source pollution (NSP) of farmland in China. With the traditional mode of irrigation and drainage in rice-based irrigation systems, the pollution of farmland drainage water has become more and more serious. Traditional irrigation and drainage systems only focus on issues concerning water quantity, i.e. the capacity of irrigation in drought and drainage in waterlogging period, yet have no requirement on water quality improvement. how to clean the water quality of farmland drainage through remodeling the existing irrigation and drainage systems has a very important realistic meaning. Pond is an important irrigation facility in rice-based irrigation systems in southern China, which has the functions of not only a storage of water from canals but also collections of surface runoffs and farmland drainage for recycling use. Such water storage features of pond provide the possibility and potential capacity for drainage water treatment by managing such features as treatment basins as the growth of aquatic plants as well as living of fishes, batrachia and microorganisms in pond forms a soil-plant-microorganism ecological system. To explore the potential capacity of pond for drainage water nutrient reduction, the Zhanghe Irrigation System of Hubei, a typical 'melon-on-the-vine' system in southern China is selected as the research site. The results of pond survey and field experiments demonstrate that plenty of ponds are suitable for collecting and cleaning paddy field drainage, and the ponds are favorable in reducing N, P nutrients in the drainage water. Other issues, e.g. how to maximize such capacity and what strategies should be sought to make existing treatment basins hydraulically more efficient, are also discussed. | BROWN Larry | 2009 | Science China(Technological Sciences)2009,52,11: | 7 |
| 6 | A Method for the Environmental Quality Assessment of Surface Water Based on Artificial Neural Networks | YANG Guo\|dong\+1,\ PAN Da\|feng\+2,\ FAN Ying\|fang\+3 1.Dep. of Environmental Science, Shanxi Uni., Taiyuan 030006, China 2.Shanxi Academy of Agriculture Science, Taiyuan 030031, China 3.Institute of Molecular Science, Shanxi Uni., Taiyuan 030006, C | 2000 | Systems Science and Systems Engineering2000,10,1: | 7 |
| 7 | WATER QUALITY MODELING OF SUZHOU CREEK显示文摘Water-quality models are important tools for improving river environment. In this paper, the project 'Water Quality Modeling of the Suzhou Creek' was briefly described, including the choice and the principle of the model, the model study and methods, the calibration and verification of the stream model. A set of parameters about water environmental characteristic of the Suzhou Creek were put forward in the period of the third water dispatch experiment in 1999. It is necessary to point out that these parameters will change with the rehabilitation and construction of the Suzhou Creek. | Xu Zu-xin, Liao Zhen-liang Pollution Control and Resource Reuse State Key Laboratory, Tongji University, Shanghai 200092, China Liu Dong-sheng Shanghai Environmental Information Center, Shanghai 200050, China | 2002 | Journal of Hydrodynamics2002,14,2: | 6 |
| 8 | SEDIMENT RETENTION AND WATER QUALITY ENHANCEMENT IN DISTURBED WATERSHEDS`显示文摘Globally, water quality and quantity issues are alarming. Water quality problems generally result from past and present large-scale land uses. Continuing deterioration of water quality and use/reuse issues place the responsibility on agriculture for water quality improvement. Research on agricultural management practices in the United States shows that production agriculture can use measures that improve water quality.Instream suspended sediments and bedload are, by volume, the largest category of pollutant, sediments also carry many compounds that adhere to them in transport. Thus, reducing sediments must play a major role in improving water quality. Innovative management practices can reduce sediments and nutrients by 70 percent or more. If broadly applied, agricultural management and stream stabilization practices can significantly reduce non-point source contamination and have the extra benefit of improving terrestrial and aquatic habitat. | C. M. Cooper(Supervisory Ecologist, USDA-ARS National Sedimentation Laboratory, Oxford, Mississippi, USA.)F. D. Shields, Jr(Research Hydraulic Engineer, USDA-ARS National Sedimentation Laboratory, Oxford, Mississippi, USA.)S. Testa, Ⅲ (Biologist Ⅲ, USDA | 2000 | International Journal of Sediment Research2000,15,1: | 6 |
| 9 | Three-Dimensional Tidal Model and Its Application to Numerical Simulation of Water Quality in Coastal Waters显示文摘- The turbulence mechanism plays an important part in the mixing process and momentum transfer of turbulence. A three-dimensional Prandtl mixing length tidal model has been developed to simulate tidal flows and water quality. The eddy viscosities and diffusivities are computed from the Prandtl mixing length model. In order to model the water quality of an estuary or coastal area many interdependent processes need to be simulated. These may be conveniently separated into three main groups: transport and mixing processes, biochemical interaction of water quality variables and the utilization and re-cycling of nutrients by living matter. The model simulates full oxygen and nutrient balance, primary productivity and the transport, reaction mechanism and fate of pollutants over tidal time-scales. The model is applied to numerical simulation of tidal flows and water quality in Dalian Bay. The model has been calibrated against a limited data set of historical water quality observations and in general | Shen Yongming , Li Yucheng and Zhao Wenqian Associate Professor, Department of Civil Engineering, Dalian University of Technology, Dalian 116023 Professor, Department of Civil Engineering, Dalian University of Technology, Dalian 116023 Professor, Department of Civil Engineering, Sichuan Union University, Chengdu 610065 | 1994 | China Ocean Engineering1994,9,4: | 5 |
| 10 | 南京仙林大学城高校校园景观水体浮游藻类调查与水质评价(英文)显示文摘The major phytoplankton was investigated and analyzed in landscape water of six campuses in Nanjing Xianlin University Town,and water quality was evaluated by single factor assessment method and comprehensive weighted evaluation method.The result showed that the major phytoplankton groups were Cyanophyta,Chlorophyta and Bacillariophyta.Besides,each evaluation indicator showed that waterbodies in four campuses were eutrophicated and result of single factor evaluation showed water quality all belonged to poor category V.The result of comprehensive weighted assessment showed that waters in Nanjing Normal University and Nanjing University of Posts and Telecommunications were seriously polluted,cyanobacterial bloom appearing.Waters in Nanjing University of Chinese Medicine and Nanjing Forest Police College hadn't been eutrophicated. | 王琳 李敬伟 夏娴 赵璐 孙晨霞 田园园 汪育文 许小军 | 2010 | Journal of Landscape Research2010,2,11: | 4 |
| 11 | APPLICATION OF LARGE SCALE TURBULENT SIMULATION FOR WATER QUALITY MODELLING OF THE YANGTZE RIVER显示文摘Large scale turbulent structures play an important role in mass transport of natu-ral river turbulence diffusion,After adopting the theory of Large Scale Turbulent Simulation tonatural rivers,some 1-D stream quality models,such as QUAL-Ⅱ,have been widely applied tolarge,middle and small rivers in China with reasonable success.Moreover,on this basis,2-Dand 3-D river quality models have also been developed.Both 2-D and 3-D models used upwindscheme plus Peaceman-Rachford’s alternating scheme in the first one and Douglas’scheme inthe second one.These models have also been successfully applied to the Yangtze River as well assome middle and small rivers in China. | Deng, Lian-mu Ye, Ming | 1993 | Journal of Hydrodynamics1993,5,2: | 4 |
| 12 | Computational theory of cavitating flows for hydraulic turbomachinery with consideration of influence of water quality显示文摘Previously it was assumed that the pressure within the cavity or on the cavity surface remained constant and the vapor pressure of clean water at 20°C and 0 m altitude was utilized as the computational boundary for cavitating flows in hydraulic turbomachinery. Cavitation was confused with vaporization, and the effect of water quality on cavitation pressure characteristics was not taken into account. In recent years, lots of experiments of cavitation pressure characteristics of different water qualities including different sand concentrations of sand water and different altitudes of clean water have been performed by the authors, and the important influences of water quality on cavitation pressure characteristic have been validated. Thus the water quality should be involved in the cavitating flows computation. In the present paper, the effect of water quality on the cavitation pressure characteristic is analyzed and the computational method and theory of cavitating flows for hydraulic turbomachinery that considers the influence of water quality are proposed. The theory is suitable for both the potential flow method and the two-phase flow method for cavitating flows simulation. Finally, the validation results for cavitating flows in a hydraulic tur- bine indicate the significant influences of water quality on the cavitating flow performance. | WANG Lei1,2 & CHANG JinShi2 1 Huadian Electric Power Research Institute, Hangzhou 310030, China 2 College of Water Conservancy and Civil Engineering, China Agricultural University, Beijing 100083, China | 2010 | Science China(Technological Sciences)2010,53,12: | 4 |
| 13 | Quasi-three-dimensional refined modelling of turbulent flow and water quality in coastal waters显示文摘The water quality in Victoria Harbour.Hong Kong is dominated by strong seasonal effects resulting from the variation in freshwater discharge into the Pearl Estuary.The quasi-three-dimensional water quality model has been developed to simulate the variations in water quality and the ecosystem in the harbour.The model is unique in that it completely integrates the refined modelling of the hydrodynamics,biochemical reactions and the ecosystem in the harbour.It is a quasi-three-dimensional segmented model which is capable of resolving mean daily variations in all the parameters relevant to pollution control.It predicts daily fluctuations in the oxygen content at different depths in water throughout the year.It takes into account transport and settling of pollutant particles.It predicts light penetration from computed turbidity variations.It includes interactions between the ecosystem and water quality,through nutrient cycling and photosynthesis.The model has been calibrated well against the data set of | 沈永明 李玉成 AllenT.CHWANG | 1996 | Science China(Technological Sciences)1996,39,4: | 4 |
| 14 | RUNOFF-ENERGY FACTORS FORMUSLE SEDIMENT-YIELD MODEL FOR SURFACE MINES显示文摘The Modified Universal Soil Loss Equation (MUSLE) is often used for sediment-yield estimations insurface mines for design and impact evaluations. However, it is not known if the widely-used runoff-energy factor of MUSLE is appropriate, or if its parameters are the same for surface mines as foragricultural watersheds from which MUSLE was developed. Suspended-sediment data from threeexperimental watersheds in Ohio (approximately 1O - 2O ha), subjected to near complete distUrbance dueto mining and reclamation, were used to investigate five altemate runoffenergy factors in the MUSLEsediment-yield model for use in surface mines. The evaluation led to the selection of the generalizedmodel form, a (runoff volume X peak flow rate)b, as the best choice among models investigated.Exponent b was greater than the widely-used value of 0.56, ranging from 0.68 to 1. 10. Parameter b wasdependent on whether mining-or reclamation-related watershed activities were predominam. Theoriginal Williams (1975) model fit the data least well of the five energy factors studied. | James V. Bonta(Research Hydraulic Engineer, USDA-Agriculture Research Service, North Appalachian Experimental Watershed,P.O. Box 488, Coshocton, OH 43812. email:bonta@coshocton.com ) | 2000 | International Journal of Sediment Research2000,15,2: | 4 |
| 15 | 一种河湖水系连通方案的综合评估方法——以汤逊湖湖泊群为例(英文)显示文摘The Interconnected River System Network (IRSN) plays a crucial role in water resource allocation, water ecological restoration and water quality improvement. It has become a key part of the urban lake management. An evaluation methodology system for IRSN project can provide important guidance for the selection of different water diversion schemes. However, few if any comprehensive evaluation systems have been developed to evaluate the hydrodynamics and water quality of connected lakes. This study developed a comprehensive evaluation system based on multi-indexes including aspects of water hydrodynamics, water quality and socioeconomics. A two-dimensional (2-D) mathematical hydrodynamics and water quality model was built, using NH_3-N, TN and TP as water quality index. The IRSN project in Tangxun Lake group was used as a testbed here, and five water diversion schemes were simulated and evaluated. Results showed that the IRSN project can improve the water fluidity and the water quality obviously after a short time of water diversion, while the improvement rates decreased gradually as the water diversion went on. Among these five schemes, Scheme V showed the most noticeable improvement in hydrodynamics and water quality, and brought the most economic benefits. This comprehensive evaluation method can provide useful reference for the implementation of other similar IRSN projects. | 杨卫 张利平 张艳军 李宗礼 肖宜 夏军 | 2019 | Journal of Geographical Sciences2019,29,3: | 4 |
| 16 | Comparison of water quality in two catchments with different forest types in the headwater region of the Hun River, Northeast China显示文摘In the headwater catchments of the Hun River,Northeast China, secondary forests(SF) have been replaced by plantations since the 1960 s. Concern has been growing over this loss and the decline in water quality caused by the plantations. To test the effects of plantations on water quality, we selected two separate catchments covered by SF and Pinus koraiensis plantations(KP) to monitor physical and chemical properties of various hydrological variables including throughfall, stemflow,through-litterfall and runoff(flowing out of outlets of the catchments). The physical properties of water declined after water flowed through the two catchments as compared with rainwater. The pH of runoff in both catchments also dramatically decreased. The concentrations of Cl^-, NO_3^- and NH_4^+ in the runoff from the two catchments were similar(concentrations of Cl-and NH_4^+ in both catchments were similar to those in rainwater). Total P concentration in runoff of the SF catchment was higher than that of the KP catchment(P concentrations in both catchments were also higher than in rainwater) because P concentrations in litter and soil of the SF catchment were higher than those in the KP catchment. In summary, the rainwater became acidic in both catchments, but the responses of most water quality variables were similar in the two catchments, suggesting that appropriate ratios of KP in SF are feasible for secondary forest recovery and for preserving water quality(KP did not cause a decline in quality) in the headstream regions in Northeast of China. | Jiao-jun Zhu Li-zhong Yu Tian-le Xu Xiaohua Wei Kai Yang | 2019 | Journal of Forestry Research2019,30,2: | 4 |
| 17 | Nitrogen Budget in Recirculating Aquaculture and Water Exchange Systems for Culturing Litopenaeus vannamei显示文摘In order to investigate the culture characteristics of two indoor intensive Litopenaeus vannamei farming modes, recirculating aquaculture system(RAS) and water exchange system(WES), this study was carried out to analyze the water quality and nitrogen budget including various forms of nitrogen, microorganism and chlorophyll-a. Nitrogen budget was calculated based on feed input, shrimp harvest, water quality and renewal rate, and collection of bottom mud. Input nitrogen retained in shrimp was 23.58% and 19.10% respectively for WES and RAS, and most of nitrogen waste retained in water and bottom mud. In addition, most of nitrogen in the water of WES was TAN(21.32%) and nitrite(15.30%), while in RAS was nitrate(25.97%), which means that more than 76% of ammonia and nitrite were removed. The effect of microalgae in RAS and WES was negligible. However, bacteria played a great role in the culture system considering the highest cultivable cultivable bacterial populations in RAS and WES were 1.03×10^(10) cfu mL^(-1) and 2.92×10~9 cfu mL^(-1), respectively. Meanwhile the proportion of bacteria in nitrogen budget was 29.61% and 24.61% in RAS and WES, respectively. RAS and WES could realize shrimp high stocking culture with water consuming rate of 1.25 m^3 per kg shrimp and 3.89 m^3 per kg shrimp, and power consuming rates of 3.60 kwh per kg shrimp and 2.51 kwh per kg shrimp, respectively. This study revealed the aquatic environment and nitrogen budget of intensive shrimp farming in detail, which provided the scientific basis for improving the industrial shrimp farming. | CHEN Zhao GE Hongxing CHANG Zhiqiang SONG Xiefa ZHAO Fazhen LI Jian | 2018 | Journal of Ocean University of China2018,17,4: | 4 |
| 18 | MODELING OF WATER DYNAMICS AND POLLUTANT SPREADING IN THE LUOMAHU RESERVOIR FOR WATER TRANSFER FORM SOUTH TO NORTH OF CHINA显示文摘Water quality is the key problem of the East-Line Project of Water Transfer from South to North China. In this paper, the principles of a 1D and 2D-integrated mathematical model for describing the dynamics of water in a flow-through river, canals and lakes was worked out. The numerical method and model algorithm were developed. The efficiency of the model was estimated by applying it to studying water dynamics in the Luomahu reservoir and simulating the spreading process of a polluted water mass and the evolution of the concentration. The results of calculations are used to assess water environmental quality and to manage water resource in the Luomahu reservoir and the Jinghang-Canal for the Project of Water Transfer from South to North China. | Wang Chao College of Water Resources and Environment, Hohai University, Nanjing 210098, China | 2001 | Journal of Hydrodynamics2001,13,4: | 3 |
| 19 | 建立农业生态环境补偿机制与保护于桥水库水质安全关系研究显示文摘于桥水库周边农田和果木等喷洒农药、施用化肥导致的污染,村落的污水、禽畜养殖的污染,水土流失等一直是于桥水库的重要污染源,严重威胁着于桥水库的水质。目前,在资金等问题无法解决库区农业人口搬迁的情况下,建立农业生态环境补偿机制、鼓励农民发展绿色食品和有机食品、投资兴建禽畜养殖污物无害化处理设施、抑制地面裸露、加大水土流失治理力度和建立援助合作机制,是减少库区水污染、保护饮用水安全的切实可行的对策。 | 汪绍盛 方天纵 笪志祥 | 2010 | 海河水利2010,,6: | 3 |
| 20 | Optimal locations of monitoring stations in water distribution systems under multiple demand patterns: a flaw of demand coverage method and modification显示文摘A flaw of demand coverage method in solving optimal monitoring stations problem under multiple demand patterns was identified in this paper. In the demand coverage method, the demand coverage of each set of monitoring stations is calculated by accumulating their demand coverage under each demand pattern, and the impact of temporal distribution between different time periods or demand patterns is ignored. This could lead to miscalculation of the optimal locations of the monitoring stations. To overcome this flaw, this paper presents a Demand Coverage Index (DCI) based method. The optimization considers extended period unsteady hydrau- lics due to the change of nodal demands with time. The method is cast in a genetic algorithm framework for integration with Environmental Protection Agency Net (EPANET) and is demonstrated through example applica- tions. Results show that the set of optimal locations of monitoring stations obtained using the DCI method can represent the water quality of water distribution systems under multiple demand patterns better than the one obtained using previous methods. | Shuming LIU Wenjun LIU Jinduan CHEN Qi WANG | 2012 | Frontiers of Environmental Science & Engineering2012,6,2: | 3 |