In order to promote the efficient use of the platform of photovoltaic power and explore the suitable economic crops under the photovoltaic panels，studying on water requirement and irrigation system of Aloe nobilis in Yunnan Chuxiong Yuanmou Tianzishan photovoltaic power station. Through the combination of model test and field experiment, the water requirement and irrigation system of Aloe nobilis under local conditions were obtained. The results show that watet requirement intensity is between 1.30mm/d～3.62mm/d，the peak appeared in August; crop coefficient of Aloe nobilis is between 0.69～1.21， the peak appeared in August;wate requirement of Aloe nobilis during March to December is 659.71mm， Critical period of water requirement for July and in August，Irrigation quota is 20mm；25%, 50%, 75%, 95% typical hydrological year irrigation quota were 490mm, 480mm, 480mm, 510mm.

Recently, Support Vector Machine (SVM) has been widely used in the establishment of the dam safety monitoring model. However, because that its regression accuracy and generalization performance depend on a proper setting of relative parameters, a new trial applied in parameters selection called ACO-SVR is established based on the Ant Colony Optimization (ACO) Algorithm. The k-fold cross-validation error was used as the fitness function of ACO. The node values in ant system were reflected by the kernel parameter and regularization parameter C of SVR. Take a concrete dam as the example to check the fitness and the rationality in concrete dam deformation monitoring model. Simulation results show that the optimal selection approach based on ACO has improve its speed to optimize. The method used for the research of concrete dam deformation monitoring model obtains higher accuracy with a wide range of applicability.

Hydraulic concrete and mortar mix quota is an indispensable supporting material for hydropower projects. It is one of the key factors that directly affect the unit price of concrete, which affects the investment of engineering. The final aim of the quota research of hydraulic concrete mix ratio is to serve the project cost. The research results should not only be used by the professionals who make the cost, but also reflect the design intention accurately in the project cost. (1997 edition) Appendix 《concrete mortar mix and the amount of material》 can not meet the requirements of the new technical regulations and norms, which prepared the project unit price and the actual there is a certain deviation, for the reasonable determination of the original hydropower construction project And effective control of project cost, this paper based on China's nearly 10 years has been built in more than 100 hydropower station project actual data on the flow of concrete mix quota research, 287 matching quotas were obtained and the results were compared with the "97 appendix" The comparison results show that the total cost of the mixture material is lower than that of the "Appendix of 97". The development of this work not only filled the gaps in this study, but also laid a foundation for further study of hydraulic concrete mix quota.

According to the conventional layout,most sand basins are set in the front of hydropower station hub.Due to the limitations of topography and geological conditions, sand basin can be combined with the damto meet the requirements of space arrangement, in which it requires a higher efficiency of desilting and flushing for sand basin. In this study, firstlysome hydraulic problems were found in the design of desilting and flushing system in a hydropower station through model tests, then some optimization measures, such ascurve cutoff, adding diversion pier, increasing therectifier pool, and changing the way of flushing, were put forward. Then to study the reliability of the new desilting system, numerical simulation was conductedto study the flow regime, velocity distribution and other hydraulic characteristics and then compared the results with model test data.The resultsshow that the desilting and flushingsystem can meet the design requirements by means of such optimization.The flow distribution was more uniform than before in desilting condition, which makessediment easy to deposit uniformly and the relatively high speed flow through the flushing bottom hole can flush the sediment out of the sand basin smoothly in flushing condition.

For two kinds of water supply units with short open channel and without short open channel after weir well in the long-distance stepped low-pressure water supply system, use the 2D numerical simulation method with Volume of Fluid model to research and analysis the flow coefficient of water-retaining weir，air input of the water body after weir well, bubble motion, the flow pattern of the downstream pressure box culvert and so on. The results show that, with short open channel been added after weir well, it hardly affect the flow coefficient of water-retaining weir and air input of the water body after weir well, the air input increase with the decrease of the submerged criterion. While, with short open channel been added after weir well, it will remarkably reduce the quantity of air entering into the downstream pressure box culvert, inhibit the surface vortex in the weir wall from developing into the downstream pressure box culvert effectively, and it can also contribute to the adjustment for the bottom mainstream, thus, it flow into the downstream pressure box culvert smoothly, and then, the flow velocity distribution in the downstream pressure box culvert will be more uniform.

In the paper, comparative experiments for sandstones in dry or saturated conditions were carried out. Meanwhile, acoustic emission (AE) data were recorded accompanied with each mechanical test. And the effect of freeze-thaw damage on the progressive failure process of sandstone was analyzed based on the change of the characteristic stress and acoustic emission localization in laboratory scale. Experimental results show that the value of peak strength and three kinds of characteristic stresses (crack close stress, crack initiation stress and damage stress) diminish gradually with the increase of freeze-thaw cycles. The AE hit number, AE accumulative count and acoustic emission localization points in each stage of progressive failure process are decreased continuously with the increasing number of freeze-thaw cycles. And finally, the normalized closure stress decreases with increasing number of freeze-thaw cycles because the frost force make part of micro-cracks closure and the initial capacity of crack weakened. But with the increasing number of freeze-thaw cycles, the deterioration of freeze-thaw damage is more and more weak, thus the normalized crack stress and the normalized damage stress have an increasing trend.

Quantitative measurement of water resources is one of important cognitive orientation approach to the development and utilization of regional water resources and the allocation of water consumed structure. Based on the water footprint, establish water users: physical water consumption, product water consumption and ecological water requirements etc. Combined with the utilization and lack degree of water resources, and the 10000 Yuan GDP output value, quantitatively analyze water resources utilization characteristics. Quantitative measurement and characteristics analysis of regional water resources utilization in Zhengzhou city are carried out by using water footprint, the results show that: the water footprint of Zhengzhou city show a rising trend, the utilization efficiency of water footprint is high, but the gap between supply and demand of water footprint is larger, and the carrying capacity is heavily overloaded.

Watershed hydrological simulation aims to demonstrate the hydrological processes mathematically in the base of hydrological knowledge. It is of great significance to implement hydrological processes simulation study for sustainable utilization of water resources. Taking the Mudan River as a case, The HBV model was applied to five hydrometric stations on the Mudan River for daily discharge simulations. The results show that HBV model performs well for hydrological simulation for well-gauged catchments with Nash coefficient over 0.5, and the model could therefore be extensively applied to other cold areas in North China regions.However, the accuracy of discharge simulation greatly depends on availability of observation data. It is hard to get high accuracy of discharge simulation for poorly gauged catchments. Application of HBV model to ungauged areas should be enhanced in further studies.

The aim of this article is to explore the pollution level of typical endocrine disrupting chemicals in the drinking water source area of Cheng Du,the contents and temporal-spatial migration and transformation of Pb,Cd,Hg and HCHs,DDTs in surface water and sediments from the drinking water source of Baimu River were analyzed respectively.The results indicated that the contents of Pb in surface water from the drinking water source of Baimu River were comparatively high especially during wet season and dry season,the Pb section exceeded Classification Ⅱ of the national surface water standard,the Cd in surface water were all below this standard,the contents of Pb in surface water during the wet season were higher than those during the dry and normal season,the contents of Cd in surface water during the wet and dry season were higher than those during normal season,similar patterns of spatial distribution of Pb,Cd in surface water from the drinking water source of Baimu River were observed.The contents of Hg in sediments from the drinking water source of Baimu River were far beyond environmental quality standard for soil,especially in late normal season,the Hg contents in the sedients from the cuting down section exceeded the primary standard of soil environmental quality standards by 4.23 times,the contents of Pb,Cd in sediments were all below this standard,the contents of Pb,Cd,Hg in sediments did not show much seasonal variation,similar patterns of spatial distribution of Pb,Cd in sediments were observed,the contents of Pb,Cd in sediments during the normal season and wet season were increasing from upstream to downstream along the river, and the contents of Pb,Cd in sediments during the dry season were decreasing.Patterns of spatial distribution of Hg showed much variation during different season,the highest content during the normal and wet season appeared at the cuting down section. The contents of HCHs,DDTs in surface water and sediments from the drinking water source of Baimu River were relatively low.

Based on field surveys and monitorings of 15 research points of researching area, combining with the relevant literature and adopting the “Pressure-State-Response” model to screen and analyze the evaluation indicators. The weight of each indicator and the comprehensive evaluation index is calculated using Analytic Hierarchy Process (AHP), in order to establish the comprehensive system of evaluation indicators and corresponding assessing methods of agricultural community in south of Jiangsu Province. According to the evaluation result of comprehensive index and its relationships with each criteria layer for researching area, proposing the relevant plans and suggestions. The evaluation result indicates: the ratio of “less than healthy” among research points is 53.3%, and 46.7% are “not healthy”; the influence of water physical and chemical indicators for the water ecological healthy is biggest, and the influence of hydrology and water conservancy is smallest.

With the problem of land resource shortage becoming more and more serious in Shenzhen, We need to find new ways to solve this problem through Landuse Optimization. The many small reservoirs type II watershed Landuse was limited by some regulations because of undertaking the task of water supply or flood-prevention. Based on centralized water supply and the function adjustment of reservoirs, watershed landuse optimization of the small reservoir type II should conform with relevant laws, regulations. The optimization results showed that the land out of the ecological control line can be used for the different area exploitation for eco- compensation of large reservoirs for drinking water supply, building the construction and demolition waste treatment facilities and country parks. The land in the ecological control line can be used for building the major transportation facilities, urban municipal public facilities, tourism facilities, agricultural facilities, educational facilities, research facilities appropriating to environmental protection. This way can improve the shortage of land resources to a certain extent in Shenzhen.

Levee construction is important to prevent from flood disaster. With the increasingly higher levees, the volume of flood lagging in the main channel generally becomes much less than the past owing to the effects of flood returning to main channel, and the increasing flood peak and flood volume leave the defense ability of levees under challenge and doubt. The Nandu river basin has special geographical features and this returning influence on its defense ability of levees is quite notable, but few studies focused on it. This paper calculates the levees' defense ability of the river under the flood returning influence, using a hydrological alteration diagnosis system and non-stationary hydrological frequency analysis method in changing environments, based on an annual peak runoff series for the period of 1956-2013 of the Santan hydrological station. The results show that the flood frequency and volume were both changed under the flood returning influence and hence resulted in considerable losses in flood control ability. A decrease in the levee's flood standard from the past 10-18-yd to the present 3-6-yd under safe superelevation of 1.0m-2.0m.

In the absence of measured hydrological data which happen flash flood disaster，the calculation of critical rainfall is particularly difficult．In accordance with the basic data of ZhangJiaPing in Lvliang city Shanxi province，the paper expounded the same frequency method, the critical rainfall calculation method based on the inference formula and the critical rainfall calculation method based on the watershed model. The late two methods calculate the critical rainfall by peak flow through different hydrological models. The critical rainfall value of the watershed was determined by three methods. The results show that the inference formula method and watershed model method has good practicability for the lack of information on rainfall warning, the result of inference formula method is small and the difference between the two methods is larger with the increase of the early warning period.

The building of water conservancy project such as dams changed the river natural runoff process to some extent, and it is very important to maintain river ecological flow for maintaining river ecosystem,s healthy. For the specific system of reservoir group, maintain the different ecological flow will impact on power generation and water supply economical target, and how to influence is remarkable. Establish a long-term optimal scheduling model of central Guizhou reservoir group, and set up three sets of basic ecological water requirement in the scheme of the channel, respectively for the basic ecological water requirement in the river are 10% or 15% or 30% in flood season (June, July and August) and 10% not in flood season of average runoff for many years. Run the model under the three sets for 2020 level and gain scheduling results. Results show that, for central Guizhou reservoir group, the basic ecological water requirements in river rose to 15% from 10% for many years the average runoff or to increase the flood season to only 30% impact on the system of social and economic benefits are small, difference is within 0.1%, river ecological water requirement in relation with electricity and water supply is imperfect competition, existence monohydrate multi-purpose phenomenon. Compare these three sets of project scheduling results and analysis the law, setting the scheme 4 (20% in flood season, 12% not in flood season) on the basis as the final recommendation, scheduling results show that the scheme 4 for guizhou long-term scheduling is appropriate.

The hydraulic transient process of different water diversion systems in hydropower stations is important to the design of stations, especially the each of units are of high-capacity. This paper is based on a hydropower station, which has the units of 1000MW capacity single, and do the research on transient process to water diversion system with different number of units and one water diversion pipe. The results provide an important basis for the design of the plant, and a reference for the design of similar engineering.

Abstract: Axial-flow pump, as the core component of low-head pump device, was widely applied along the Yangtze River and sea area, and the stability has a great effect on safe operation of pump device. So the study on dynamic characteristics should be performed to ensure the safety of pump device. Reversible axial-flow pump, as a new type of axial-flow pump, adopt two-direction impeller, which lead to the dynamic characteristics is distinctive and should be studied in detail. Modal which is included in the study on dynamic characteristic can determine natural frequency and vibration mode to prevent resonance. In this study, the coupling of WORKBENCH and APDL command stream was used to carry out modal analysis. The results show that the effect of pre-stress on natural frequency is little and the wet-modal natural frequency is smaller than dry-modal natural frequency in every modal order. The blade number, hub diameter and material properties affect natural frequency obviously in some modal order. The results can provider information for structural optimization design and dynamic analysis.

In order to study hydraulic performance, for the last stage of dual-imports Parallel self-balancing horizontal multistage centrifugal pump. Multi-Designed double volute multistage centrifugal pump pressurized water chamber, under the condition of given impeller model. The model with the baffle extending near to the exit and the velocity coefficient of 0.38 is best one of the three schemes through the CFD simulating. The tolerance is lower than 2% between the test result and the CFD simulation, with the high efficiency between 0.75~1.3 rated flow.

In China，the research on environmental protection of drinking water source is still in its beginning and exploring stage. We need to design and research on information system frame of drinking water source. The paper introduced the background, the system design goals and the main functions of drinking water source integrated management information system of Hainan province. The system has many characteristics, such as practicability, interactivity, developable, and intelligent, etc. The system can enhance environmental monitoring and management ability of drinking water source. Drinking water monitoring early warning and dynamic management will be achieved by the system. The overall level of environmental protection on drinking water source will be promoted.

The construction and management of drinking water safety projects was a main content in development of rural water conservancy. Based on investigation, this paper focused on eight kinds of management modes existing in current rural water supply projects in Yunnan province to seek to analyze a few common and individual problems and its causes in the management from the perspective of mechanism, preferential policy, water price, professionalization, system construction. Some suggestion were given, from aspects of the application of water-users association in small concentrated water supply project management should be explored, the construction of systematic integrated management represented by rural water supply company should be advanced, the construction and operation of projects using PPP financing mode should be encouraged and guided, mechanism of water price formation and fiscal subsidies, and management method and preferential policy should be executed as soon as possible, the feasibility of integration of urban and rural water supply should be explored, modernization and informatization management level of rural water supply projects should also be improved.