Along with the increasing specialization and commercialization of agricultural production and services ( including irrigation and drainage service) ，there is also an increasing demand for both of practitioners and policy makers to clearly understand the characteristics， advantages and disadvantages，and challenges faced of farmer＇s water user cooperation organization ( mainly including water user＇s association and water conservation service specialized cooperatives) and farmer＇s specialized cooperatives． Based on literature review，field studies，and defining the concept of these two farmers＇ self－organizations，this paper presents the comparative studies of these two kinds of organizations systematically in terms of its legal status and foundation，organizational characteristics，service contents and characteristics，operational models and results，and existing problems and challenges，in order to provide points of view for practitioners and policy makers in relevant areas． 

Based on the theory of planned behavior，we analyze the factors influencing farmers＇ willingness to participate in establishing the small water conservancy facilities using the survey data of 349 farmers in two pilot counties ( Baotou，Bayannur) in Inner Mongolia． The results show that the theory of planned behavior can be well applied to analyze farmers＇ willingness to participate in establishing the small water conservancy facilities． The most powerful factor influencing farmers＇ willingness is their attitude，and their subjective cognition and perceived behavioral control follow． Their willingness is influenced primarily by economic benefit stimulus，neighborhood willingness to participate，external support，and individual＇s capability． 

Aiming at the problem of "built, manage, use" serious disconnect that existed in small water conservancy projects in Ningxia, comprehensive consideration of the new requirements of water-saving irrigation, studied combining water rights management with water conservancy project property rights management, and introduced the ideas of water management based on ET, designed the small irrigation engineering property system model based on ET. Choosing Yellow River irrigation canal system, water irrigation pump station, irrigation motor-pumped wells as typical pilot project, the paper carried out the application research of property rights system reform of small irrigation projects. By the evaluation of performance of the typical project reform system, the typical project all showed good economic, water saving, social and ecological benefits, that played a demonstrative guide for deepening the reform of property right system of small water conservancy project in Ningxia .

Based on the investigation，analysis and summarization of the channel lining pattern and the effect of frost heaving in the northern irrigation area in recent years，and fully draw lessons from domestic and foreign research results and experiences，the 5+000－5+056 m is selected on the western bank of Chonghuer Irrigation Area in Burqin County in Xinjiang as the experimental section． Through experimental observation and analysis for 3 years，analysis and comparison different forms of anti-frost heave effect and technical economic indicators，the most suitable lining-work pattern is selected，it applies to the characteristics of irrigation area，satisfies the safe operation of the canals，is economical and practical and has remarkable effect on guarding against heave

As the operation of traditional CAＲT decision tree model is time-consuming，we choose the Fayyad Boundary Decision Theorem optimization attributes to reduce the time for operation． Because of the factors that influence the formation of bloom，this paper uses the correlation coefficient in statistics to select the influencing factors that have a greater correlation with the occurrence of bloom，one step is to filter the condition attributes one by one，to further shorten the running time，and to ensure the overall prediction accuracy． Finally，the experimental results show that the improved bloom warning model can reduce the running time and ensure the correct rate of prediction．

In a basin，there is a strong interaction between surface-water( SW) and groundwater( GW) regimes，especially in the valley region． Doing research on the SW and GW separately usually ignores the link between surface water and groundwater． In order to overcome this shortcoming，a hypothetical case is suggested in this paper． To establish a SW/GW model，the dual-node approach is used to couple the flow model of SW and GW． On this basis，the coupling transport model is built by Fick Law． The coupled simulation model will be solved via HydroGeoSphere to forecast the distribution of flow and total nitrogen in 120 days． The simulation results show that the GW is recharged by the SW，because surface flux will decrease when the GW is pumped． With the over-withdrawing of underground water，groundwater pollution is becoming more serious．

An improved multi-objective Cat Swarm Optimization ( IMCSO) cat is proposed to improve the combination ratio while the design elite mutation strategy prevents algorithm from entering local solution through IMCSO algorithm to solve the model effectively． At the same time，a suitable system optimization is constructed based on subjective preferences and the entropy weight of Vague set multiple attribute decision-making method has been improved． The comprehensive reflection expert group subjective preference subjective weight vector，and combining the improved entropy method of calculating the objective weight of comprehensive weight can be obtained． According to the proposed sorting function comprehensive Vague values of each scheme． The solution shows that the presented method is reasonable，effective and highly practicable． It can improve the ecological environment of Dongting Lake and Poyang Lake in the middle reaches of the Changjiang Ｒiver．

Abstract:To verify the correlation between urbanization and the consumption of water resources, the paper quoted stripat model and the kuznets curve to analyse the water environmental load quantitatively and its relationship between social and economic factors, such as population(Pi),urbanization (Ui), GDP (Ai) and Technology (Ti).Through ridge regression model , the coefficient of four variables (Pi,Ui,Ai,Ti)can get . From the research,three results can get . If the population(Pi) ,urbanization level (Ui), GDP(Ai) and technology (Ti) ,each of the four independent variables changed 1%, will cause the water environment load change- 0.2008%, 0.3162%, - (0.0419% 0.0042% InA) %, 0.2008%,or 0.0140%. the urbanization’s the coefficient of quadric is positive,showing that kuznets curve is not existing; it compared the positive and negative effects of the economic growth and technological progress to the environment load; based on the above research, the paper get the conclusions that the scheme 5 in the six schemes is the most suitable developing pattern for a city. In scheme 5, if GDP is in the rapid growth trend, the population keep the medium growing speed, and strictly control the urbanization, the water saving efficiency is improved, from the 2020 to 2025,,the bijie city water consumption is 781036.93 x104m3 and 771746.4 x104m3 respectively, water resource load is the lowest at this time.

Since the impoundment of Three Gorges Ｒeservoir，the river reach from Zhicheng to Yangjianao have suffered from severe erosion． However，it remains unclear how different operation rules for Three Gorges Ｒeservoir affect the erosion and deposition of this river reach． Employing the two－dimensional depth －averaged model for fluvial processes，the present paper systematically investigates the impacts of distinct operation rules for Three Gorges Ｒeservoir on the river reach from Zhicheng to Yangjianao． The results show that under the current operation rule，the river bed is mainly demonstrated to be eroded． It is also estimated that in the 10 years，the river geomorphology will remain stable as the erosion depth of river bed will be close to its limit depth． Although appreciable discrepancies of bed deformations due to different operation rules can be spotted，the river bed exclusively suffer from erosion．

In order to solve the problem of the low efficiency of the traditional horizontal sedimentation tank, the paper carried out the study on the settlement effect of a new type of double-deck horizontal flow sedimentation tank in the water of high turbidity. This study designed three tank model : to flow inclined plate structure under double-deck horizontal flow sedimentation tank (model A), to the flow on the inclined plate tectonic double-deck horizontal flow sedimentation tank (model B) and tandem double-deck horizontal flow sedimentation tank (model C) , based on the three tank model in high turbidity to shed not adding flocculants compared with adding flocculant experiment, analysis of new double-decker advection sedimentation tank with existing tandem double-deck horizontal flow sedimentation tank for high turbidity flow sedimentation effect, analyze the effect of the settlement of the three tank found three tank next to the flow inclined plate tectonic double-deck horizontal flow sedimentation tank settlement work best. At present, the data about double-deck horizontal flow sedimentation tank model test research is less, in this paper, through theoretical analysis and model test for the new double-deck horizontal flow sedimentation tank based on the use of high turbidity to flow region to provide theoretical basis.

The influence of land use change on the evapotranspiration is a hot issue in the hydrology and other related areas． The paper selects Xixian Basin in the upper reaches of Huaihe river as the study area，and analyzes the land use change on the basis of data of land use in 1995 and 2000． Then，it analyzes the effects of land use change on potential evapotranspiration in different typical years and different time scales based on the calculated values of evapotranspiration in each grid with the application of dual-source potential evapotranspiration distributed model． The results show that: from 1995 to 2000，the land use in 30% of the watershed area has changed，and the largest proportion of all is the transition from paddy field to dry land; the seasonal potential evapotranspiration in great mass of areas in which potential evapotranspiration has reduced to different degrees in different typical years，especially in summer; the annual potential evapotranspiration in great mass of areas in which potential evapotranspiration has reduced to different degrees in different typical years，and the dry year is the most significant． The research results can provide support for the study of water cycle evolution in the changing environment，and also have reference value for the development and utilization of water and land resources．

Based on the daily rainfall data of 22 meteorological stations in Sichuan Province and its neighboring provinces from 1955 to 2015, through analysis methods which include ordinary Kriging spatial interpolation and linear regression, this paper analyzed spatial-temporal variations characteristics of rainfall erosivity in Sichuan Province during the year. It turns out that the rainfall erosivity and the rainfall of Sichuan was extremely positive correlation, the annual distribution is more consistent. The rainfall erosivity changed significantly in a year, which was high in summer and was lowest in winter, and the rainfall erosivity in each season is not only the decending from southeast to northwest but also with the significant spatial differentiation. The variation trend of rainfall erosivity of four seasons was all rising, the rising rate was summer>autumn>spring>winter in turn, and spring, summer, autumn was extremely positive upward trend(p<0.01), winter was positive upward trend(p<0.05) .The annual variation of the monthly rainfall erosivity in Sichuan was single peak pattern, with peak values occurring in July, however the annual variation of the monthly rainfall erosivity from the 11 stations in Sichuan was two patterns single peak pattern and double peak pattern. The rainfall erosivity of 11 stations in Sichuan was inapparent upward trend(p>0.05).The feature about rainfall erosivity from 11 stations in Sichuan Province in the mass is inverse correlation, we can arrive at a conclusion the greater the rainfall erosivity is, the lower the elevation is, the rainfall erosivity and the attitude is extremely negative correlation（r=0.838,p<0.01）.

Extreme rainfall and high urban hardening rate have led to frequent urban inundation in recent years． Nevertheless，underground space has disadvantages against the inundation． The existing research on underground space inundation is chiefly targeted at hydrodynamic characteristics of rainwater intrusion into underground space，which rarely takes the regional runoff and confluence process into consideration． In order to predict the risk of inundation in underground space under different rainfall intensities，regional drainage model is put into the calculation model of inundation in underground space． In addition，the runoff and confluence and the calculation principle of hydrological and hydraulic model in underground space is introduced in detail． Taking the tunnel as an example，this model can be used to evaluate the risk of inundation under different rainfall intensities，which can provide a basis for inundation management and emergency rescue． 

Engineering potential destruction risk caused by flood can be presented by the frequency of annual highest stages in front of engineering (Hm). A quantificational relational expression among annual highest stages，flood peak discharge (x) and flood volume (y) was established, which was based on the condition that flood hydrograph was generalized into triangle. And then, based on stochastic simulation method, the annual highest stages (Hm)N were calculated according with flood prevention standard. Therewith, the combinations of flood peak discharge and flood volume are analysed at the request of satisfying the standard. Result has shown that its calculation was above the flood prevention standard on the condition of the combination that flood peak discharge and flood volume are same frequency, in addition, The variation of engineering’s characters of flood prevention have impact on Hm, which above can be demonstrated.

 The accuracy of the design flood results directly affects the reliability of the critical rainfall of mountain flood and the accuracy of early warning，so it is necessary to review the inspection． Based on the data area，this paper uses a long series of flood data frequency calculation method，method of production flow in small watershed and flood peak modulus method to inspect and review the design flood analysis and evaluation． Using similar river basin ideas，the inspection review results are diverted to the region without data． Minsheng village 1 group of Jiangxiying Basin in Shanxi Province with better data and Majiaan Village 11 group lack of data are exemplified． The results show that when the design flood is above once every twenty years，the calculated results conform with data． When the design flood is below once every ten years，the calculated results are bigger than data． Undergoing correction，the precision of results is improved effectively． Using the conclusion on Majiaan Village 11 group，recalculating and verifying the test result，the conclusion is reliable． It provides a new approach for the analysis and evaluation of mountain flood disaster design flood review in small watershed.

In recent years, the issue of the flood disaster into Huaihe river is becoming increasingly serious, which threatens the safety of the lives and property of people. However, flood retarding basin has important control over the evolution of flood water, so the research on influence of flood retarding basin on flood control is particularly important. In this paper, the hydrodynamics method is adopted to calculus the conflux of the motion of flow in the mainstream of Huaihe River to build a numerical water flow model. The model is applied to simulate and calculate the motion of water flow. Compared with the measured data, the results show that the tally of computation and observation is in a good agreement. The model can be applied in production practice via appropriate improvement. Meanwhile, this paper takes Huayuanhu flood storage area as an example to study the influence of some factors that play relatively important roles in the example of case. The flow calculation model can forecast and analyze future historical flood , which provides us with reliable data and technical support to control the disaster of flood.

This paper applies hydrology and hydraulics method to carry out a research on the Dongting Lake three-outfall river ecological base flow，puts forward the ecological basic flow control index for the realization of“stable pattern，perfect arena and disaster mitigation system，improvement of water security and river health”． Water resource protection and health protection capacity of the rivers and lakes provide not only a theoretical foundation，but also a reference and for the design of the Dongting Lake and Songzi port gate control project planning．

The intentions of this paper were to evaluate the sensitivity of the Storm Water Management Model (SWMM) output to its input parameters and to improve the calibration efficiency of model parameters. Two different methods of global parameter sensitivity analysis were applied in this study, the first one is the partial rank correlation analysis method, the second one is the mutual information analysis method. Partial rank correlation analysis method and mutual information analysis method were used to assess the global sensitivity of the hydrological parameters of storm water management model. The influence of the change of input parameters to its output were analysed by choosing a neighborhood used to build the SWMM model which parameters were sampled by using Latin hypercube sampling method. The results showed that roughness of conduit is the most sensitive parameter to the peak flow, the roughness of conduit shows negative relation with the peak flow. Roughness of pervious area was the most sensitive parameter to the peak time, the roughness of pervious area shows negative relation with the peak time. The roughness of conduit is the most sensitive parameter to the total runoff volume, the roughness of conduit shows negative relation with the total runoff volume.

Based on the daily precipitation data in 29 representative rainfall stations in Suzhou，Wuxi and Changzhou from 1961 to 2015， four indexes of extreme precipitation，extreme precipitation frequency，extreme precipitation intensity and extremely strong precipitation are selected． The time mutation of extreme precipitation is studied by the sliding rank sum test． The trend and spatial distribution of the index in the study area is also analyzed． The results indicate that the extreme precipitation，extreme precipitation frequency and extreme precipitation intensity in the southeast showed an increasing trend between 1961 and 2015，only the extreme precipitation intensity showed an increasing trend between 1981 and 2015． The distribution of four indices is basically the same，and the mutation time mainly appeared in the 1980s after the implementation of reform and opening-up． The characteristics of the extreme precipitation index in Suzhou，Wuxi and Changzhou are related to their urban cultures．

Reservoir impoundment was divided into conventional use of impoundment and initial impoundment, conventional use of impoundment would be affected by the inflow and downstream water demand, initial impoundment which examined these new projects would be affected by the engineering factors as well. Inflow, water demand and engineering problems were involved in the storage of reservoir, therefore, it was fatal to identify the influencing factors of reservoir impoundment, coordinate inflow, water consumption and impoundment, allocate the supplying and impoundage, definitude the risk of impoundment and formulate reasonable water storage scenario. Based on this, this paper concentrated on the problem that the influencing factors of reservoir impoundment and the risk and scheme of water impoundment, sorted out theoretical and practical research on this issue of domestic and foreign scholars, explored its future focus on the basis of the predecessors' studies, so as to provide reference for the subsequent reservoir water impoundment research.

Abstract: Based on the analysis of available water resources in semi-arid areas of loess plateau of western China, whether can satisfy the safe drinking water or not, the main application effect of the currently water quality purification technology in parctice would be key studied and evaluated, and put forward the feasibility and development direction using rainwater resources to solve safe drinking water issues in remote areas of western China.

Wells houses are an important part of the construction of irrigation projects relying on groundwater. Pumps, power distribution cabinets, valves, frequency converters and other equipment are installed in the houses. Extreme low temperature will bring adverse effects and even cause damage on equipment, as a result, shorten equipment service life. A new insulation well house is developed in this paper, and insulation materials are filled in the gap of its wall. The well house is heated through carbon fiber and solar energy and its foundation is insulated by foam boards. The field test results show that the profile of daily-averaged temperature difference between inside and outside of the well house is basically parabolic. The temperature difference is higher when outside temperature drops. The maximum temperature difference is up to 18 ℃ or so in winter. Results show the integrated well house will obviously and effectively reduce frost damage of equipment in seasonal frozen districts.

The wake structure of aquatic vegetation patch is influenced by submergence degree，having a positive response to local flow characteristics and the distribution of nutrients． Through the flume experiment，research is done on the mechanism of the effect of submergence on the longitudinal flow distribution of wake． The experimental results show that when the degree of submergence is large( early growth stage) ，the flow is directly behind the vegetation patch change uniformly，the peak value of velocity and turbulent kinetic energy are close to the average value of the upstream． Affected by Karman vortex，the patch wake of different submergence degree can produce turbulent kinetic energy containing the two peak values． When the degree of submergence is small ( late growth stage) ，the variation of turbulent kinetic energy directly behind the patch increases gradually，with the effect of von Karman vortex reduced，is not conducive to the longitudinal extension of vegetation patch．

The BP neural network suitable for geotechnical engineering problems is used to establish a nonlinear mapping relationship between the constitutive model parameters and the test indexes of the rockfill body． The BP neural network is used to obtain the connection weights，and the connection weights are processed by the Olden approach，reflecting the degree of sensitivity of rock mechanics parameters． Compared with the commonly sensitivity analysis of rockfill mechanical parameters based on statistical approach，this approach can well reflect the mapping relationship between parameters and test indexes，and has the advantages of simple combination of design parameters and convenient data processing． The maximum vertical displacement，the upstream maximum displacement and the downstream maximum displacement of Shuibuya CFＲD are taken as three test index of the sensitivity analysis． The sensitivity of the rheological parameters are calculated and analyzed． The results show that the sensitivity of the parameters m to the three test indexes is relatively high，followed by the parameters η、c、d，the parameters c_α、d_α、c_β、d_β、λ_v on the three test indicators are relatively small． The research results of this paper serve as a reference for the sensitivity analysis of the mechanical parameters of other models of rockfill

The vertical bearing mechanism of over－length piles and its influence factors has been a hot research problem in engineering． Nonlinear finite element method is adopted to simulate the response of over－length pile under vertical load． Factors of different pile length to diameter ratio，different elastic modulus ratio of pile to soil，different elastic modulus ratio of soil under pile to soil adjacent pile and different magnitudes and distances of neighbor loads are considered． The effect of different factors on the vertical bearing mechanism of over－length pile is evaluated by the distribution of axial force along the pile body． The vertical load transfer mechanism of over－length pile is revealed， some useful conclusions are provided for the design and construction of over－length pile．

In the actual project，the evaluation of slope stability is still based on single plate thickness calculation formula． In fact，slope stability is affected by many factors such as board length，structural type and environmental conditions． How to sort the influence factors is the key problem in the design of slope protection． On the basis of the calculation formula for the anti-sliding safety coefficient of concrete slope protection，the sensitivity analysis of slope stability is performed by using the orthogonal design，five factors including the length of slab， thickness of slab，wind speed，slope ratio and cushion material are considered． And the analytical conclusion is used to solve a slope collapse problem of actual projects． The results show that the length of slab has the most sensitive effect on the stability of slope，followed by the wind speed and slope ratio，while the influences of thickness of the slab and cushion materials are insignificant． The research results serve as a reference for the slope design，stability evaluation and reinforcement of the existing projects．

greening-concrete that has not only the stability and anti-erosion of concrete but also the landscape suitability and ecological function of plant revetment has been widely used in river revetment engineering. In this paper, the influence of water cement ratio, cement content, aggregate size and age on the mechanical properties, apparent density and porosity of greening-concrete have been studied. Under the conditions of optimal water cement ratio, the compressive strength, flexural strength and apparent density of greening-concrete increase linearly with the increase of the cement content; The compressive strength, flexural strength and porosity of greening-concrete decrease linearly with the increase of aggregate size; The strength of greening-concrete increase also with age.

It is significant to propose a method of unsaturated soil slope stability analysis accounting for the distribution of matric suction and the effect of seepage． Considering the slope as a whole，its potential function including the contribution of transient unsaturated seepage without any assumption on the shape of sliding surface is established． Based on the minimum potential energy principle and Fredlund＇s shear strength theory of unsaturated soils，a formula of factor of safety ( FS) of minimum potential energy method is derived． In contrast with classical limit equilibrium method，the advantage of minimum potential energy method is that it can satisfy the equilibrium differential equation and the force boundary conditions without being divided into slices． In a case of stability analysis of slope under rainfall infiltration， the good comparison with Spencer Method and Morgenstern-Price Method shows the effectiveness of minimum potential energy method and its good practical value due to the simple calculation without iteration

Based on the principle of orifice outflow, this paper designed round hole of the new flow meter. The relationship between the water opening degree, the pressure head and the flow of round hole of flow meter is obtained by experimental research. The results show that the water flow rate of the device increases with the increase of the pressure head when the water opening degree of the device is constant, which is multiplied by the power function. And the water opening degree has little effect on the pressure sensitivity coefficient. When the pressure head is constant, the distribution flow increases with the opening of the water outlet. And it obtain the empirical formula of flow rate, water opening degree and pressure head of the flow meter, and there is a good consistency with the measured value. The research of this paper is of great value for the popularization and application of the new flow meter in modern industry.

The three-dimensional finite element analysis of stress and deformation for Shiziping Core Ｒockfill Dam constructed on the deep overburden layer，was performed by Duncan-Chang and ellipse-parabola double yield surface models respectively． The differences of stress and deformation calculation results between the two constitutive models are analyzed． The results show that the distribution of dam deformation and stress is roughly similar to the two models． But some differences still exist． The maximum dam settlement calculated by double yield surface model is 2．2% smaller than that calculated by Duncan-Chang model． The ratio of maximum horizontal displacement along the river to maximum settlement is 0． 22 for double yield surface model，which is close to some existing engineering monitoring data，while that by Duncan-Chang model is slightly larger，namely 0．37． The core arching effect coefficient Ｒ is adopted for the evaluation of core arching effect． It shows that core arch effect calculated by Duncan-Chang model is stronger． The decrease in minor principal stress in the upstream dam shell is more notable for Duncan-Chang model，but no tension stress appears．

Nature-like fishway has solved many problems existing in the traditional fishway． The flow condition at nature-like fishway is close to the natural channel，and fish collection system can be set up at nature-like fishway＇s entrance． It can improve the application results by producing appropriate flow fields through the water supplement system and other measures． Through integral model experiment of Yakou Hydraulic Project in Hubei Province，we study the flow regime，velocity distribution and other hydraulic characteristics of fish collection system at nature-like fishway＇s entrance． We propose the optimal layout of the water supplement system which can improve the internal and external flow field of fish collection system by analyzing the data from model experiments． This research can be a reference for similar projects． 

After the successful transformation of Yingxiuwan Power Station turbine runner，an appropriate runner was selected to determine the selection of the new runner and primary flow components of Yingxiuwan Power Station is reasonable． The computational fluid dynamics ( CFD) method is used to calculate and analyze the original power flow components of Yingxiuwan． The original flow components of Yingxiuwan Power Plant need to be replaced． By combining the calculation of spiral case and fixed guide vane，fixed guide vane and guide vane，results show that，the newly selected runner is matched with the original flow passage component． In the transformation of the power of Yingxiuwan，it is not necessary to flow over parts of the shape modification．

To reduce the peaking abandoned hydropower of hydropower station for the power system being lack of peak-shaving capacity in grid dispatching planning, not only in line with the current national development of energy-saving power generation dispatching, environmental protection, consumption trends, and more reasonable and effective use of limited water resources. In this paper, the difference of peak shaving capability of hydropower and thermal power stations is analyzed in the balance of electric power and energy, By using the equilibrium relation, the variation law between the reserve capacity allocation and the total peak shaving capacity of the power system is qualitatively analyzed, and establish the corresponding the minimum of peaking abandoned hydropower for the optimization of reserve capacity model. Put forward the reserve principle to obtain initial solution based on the idea to solve the model and the use of water power station, peaking capacity difference and step acceleration method. Propose a solving idea based on getting initial solution from the principle of equivalent reserve capacity, and the peak-shaving capacity difference between hydropower and thermal power stations, and step acceleration method. The correctness, feasibility and effectiveness for the results of the minimum of peaking abandoned hydropower for the optimization of reserve capacity model and the solving idea are verified by numerical examples.

Abstract: In the field of hydropower generation, the surface of hydraulic turbine suffers abrasive damage when run in sediment-laden flows, which gravely affects the operating efficiency of hydraulic turbine unit. Establishing a system to realize on-line monitoring for sediment concentration is of great significance for scheduling of hydropower station. In this paper, a turbidity sensor is designed according to the specific sediment characteristics of Yingxiuwan hydropower station, based on which a sediment concentration on-line monitoring system was built and applied in Yingxiuwan hydropower station. Application results indicate that the system has a good operation stability and high reliability. In addition, it can reflect the changes of the water-sediment environment and provide important basis for scientific operation, which has strong utility value and significance of generalization.

The main items and results of model test for Unit 5 capacity expansion in Shuikou hydropower station are introduced in detail. The test result of model test acceptance indicates that all the performance parameters of the model runner meet the requirement of the Contract. Particularly, the cavitation performance are proved to be excellent and can guarantee that the unit’s capacity be expanded to 230MW.