Groundwater and surface water from local rivers are collected for major element analysis and stable isotope (oxygen-18 and deuterium) compositions around Xinxiang in order to address the pollution mechanism of groundwater. The results indicate that precipitation is the main source of groundwater. Taihang area is the main recharge region of the north area. In the middle area, shallow groundwater is affected by Communistic canal water, and they have similar isotope values. In the south area, precipitation and Yellow River water are the main source of groundwater. The polluted water flow, pollutants transfer in the unsaturated zone and the migration of salt and pollutants which resulted in absurd exploitation are the main ways of groundwater pollution.

Based on the national standard for groundwater quality, the multi-dimensional dimension-reduction technology of projection pursuit classification model (PPC) is adopted. Improved immune shuffled frog leaping algorithm(ISFLA) is used to optimize their projection direction. The high dimension index is conversed into low dimension. The projection function value is used to appraise water quality. The results show that convergence speed and searching precision of immune shuffled frog leaping algorithm are better than those of shuffled frog leaping algorithm. The model can assess water quality appropriately.

Based on an investigation of 42 villages and 22 riversides in Caoqiao Valley, Xueyan Town, Wujin District, Changzhou City, seven villages and five riversides were selected to carry out a key regulation planning for water environment. Meanwhile, a project cost-benefit analysis was made of combining centralization-decentralization model and riverside ecological centralized processing model.Then specific suggestions were proposed. Regulation planning was made based on on-the-spot observations and relevant material collecting, combining the quantitative with qualitative analysis, this paper puts forward a reasonable indexand defines planning objectives and project investment.

Anaerobic sludge is cultivated and acclimated by adding different co-metabolism substrates under six conditions by using chloroform as target contaminant in the anaerobic environment. The obtained microorganisms with chloroform biodegradability are enriched and cultivated to add separately into the simulated decontamination device to carry out the treatment experiment. The test results indicate that the chloroform can be degraded by the microorganisms under anaerobic conditions, and the efficiency of biodegradation is improved with the addition of the co-metabolism substrates. In addition, the efficiency of biodegradation is different from that of the co-metabolism matrix. The removal efficiency of the pollutant can reach 75% by using the microorganisms which are cultivated and acclimated through glucose and methanol as co-metabolism substrates.

With the development of the industry and the speed-up-proceeding of the industrialization in the Yellow River Basin, a large amount of pollutants, especially the organic pollutants, are in feed into the water in various ways. The Yellow River is being polluted in an increasing way. The function of the water decrees, even disappear. The Yellow River Basin is facing a double crisis of lacking of water and water pollution. This text gives a general idea about the current condition of the water storage and water consumption in the Yellow River Basin. Further more, giving an evaluation on the water quality and analyzing the causes of it. At last, some suggestions have been given to improve the quality of the water.

Influenced by severe cracking and leakage, the construction of irrigation ditch in East-Tibet is facing the matter of low utilization rate and discharge capacity. The main reason lies in objective factors, such as geological condition, as well as the subjective factors, such as backwardness in planning & design and operation. To solve this problem, besides the measure management and good maintenance, it's more important to bring up breakthrough of planning & design and Water Saving of new irrigation Engineering in rural and pastoral districts in East-Tibet.

Based on the principles of cost compensation and fair burden of the irrigation district, terminal water price of irrigation districts is calculated reasonably. Meanwhile farmers’ bearing capacity of water price is analyzed objectively according to some data of main crops cost benefits. The Compensation mechanism of agricultural water in Tongshanyuan Irrigation District is put forward in the end.

Through analyzing the 12 sediment sampling sites in Surface Sediments from the Wuliangsu Lake, it shows that the content of organic matter from 10.241 g•kg-1 to 33.911 g•kg-1 , its mean value is 20.928 g•kg-1 and the content in surface sediments from the north of Wuliangsu Lake is higher than the south, and has a spatial distribution characteristics of abundant organic matter content in the littoral zone of the Lake. The total nitrogen and average values content are 0.519~1.510 g•kg-1 and 0.86 g•kg-1 respectively; The total phosphorus and average values content are 0.505~0.635g•kg-1 and 0.546 g•kg-1 respectively; In horizontal direction, the organic matter content has significant correlation with the total nitrogen and total phosphorus content, which is 0.814 and 0.738 respectively ,demonstrating that organic matter accumulation is an important factor which promotes lake eutrophication and water eutrophication has an obvious endogenous.

: Based on the Saint-venant equations, a current numerical model for river networks was developed by use of the node control method for water level. It was applied on study of water enviornment treatment in the urban river of Zhangjiagang City. According to results of the numerical model, an operable scheme of diversion works for water enviornment treatment was presented and It gave a basis for the design of water enviornment treatment project. The river network numerical model can also be applied on study of water enviornment treatment in other urban river along the Yangtze River.

Recently, unstructured finite volume method has been developed rapidly, but topographic handling, a difficulty in finite volume method numerical simulation has direct influence to the rationality of computing result and model stability. As to the problem of topographic handling, Hydrostatic reconstruction method was chosen after comparing to the other methods at home and abroad because of its exceptional performance. Having coupled hydrostatic reconstruction method with Roe’s finite volume method, we establish Well-balanced Roe finite volume model and have an examination on this algorithm by using classical example. During the examination, the concordance of model has been verified in the examined example by triangle and quadrangle’s hybrid grid.

The pump station effluent flow path is designed to achieve optimization of drainage flow path. 14 kinds of effluent schemes of flow path were designed, according to the basic parameter of pump station. Each scheme has the different structural parameters such as tortoise form of the back, pour the radius of circular arc, and right angle. In the operating modes of 0.9Q, Q and 1.15 Q, CFD technology was adopted. The three-dimensional inner flow of 14 kinds of schemes were simulated using the standard κ – ε. As a result, under the same sizes of import and export of effluent flow path, the hydraulic loss of tortoise form and pour is minimum. Therefore it is reasonable to select this scheme, fulfilling the forecast of hydraulic property of flow path. It has offered reference basis for the effluent hydraulic design optimization of flow path and the research of model test.