The soil erosion resistance includes soil anti-scourability and anti-erodibility. The consolidation and winding of roots have a significant impact on soil erosion resistance. In this paper, we study the anti-scourability and anti-erodibility of soil samples of winter wheat roots in different levels using the hydrostatic disintegration method and the soil bins method. The results showed that: the roots can decrease the soil disintegration rate, it is slowly decreasing as the increasing of the roots. The process of the disintegration can be divided into absorbent disintegration stage, rapid disintegration and steady disintegration stage. The absorbent disintegration and rapid disintegration has become long as the increase of roots density. It showed a increments quadratic function relationship between the soil anti-scourability coefficient and root weight density.

As the key part of rural infrastructure construction. Agricultural hydraulic engineering is vital to facilitate the rural economic developments and improve the farmers living standards. This article analyzes the status quos and development of agricultural hydraulic engineering in Yunnan province. As well as presenting the current deficiency in supply, this article also exposed the deep reason behind these problem with solutions in tackling those problems.

In the study of the group game, we must research the dynamic evolution characteristic from micro level if individual characteristics is different, it can indicate the regular rule of cooperative behavior. The paper first analysis the major factor that affect farmers' cooperative behavior in the management of irrigation and water conservancy, including macro factors, micro factors and ambient. Then construct the basic network evolutionary game model, farmers learning pattern, strategy update pattern and the update policy. At last, we use the netlogo software programming and simulating the complex network evolutionary game, the results reveal the major factors how to influence the cooperative behavior, including the frequency of cooperation, groups evolution feature, and so on.

In recent years, the solar energy as a new energy be used in agriculture, based on the irrigation technology of solar energy has been developed rapidly all over the world, especially the water-saving irrigation technology based on solar power but also receive greater attention. High efficiency, energy saving, low carbon and environmental protection is the prerequisite and foundation to develop modern agriculture, water-saving irrigation is the guarantee of mutual combination of solar technology. Around the solar water-saving irrigation technology development present situation at home and abroad research situation, points out the characteristics of the existing solar water-saving irrigation system, and on this basis points out the necessity of developing solar water-saving irrigation in China, developed the corresponding artificial intelligence - solar device, automatic water saving irrigation system and get a better application in practice is the main direction of the research at the moment.

Abstract: Aiming at the problem of water shortage of coastal areas, the comprehensive evaluation index system and evaluation model of water-saving agriculture about Weihai were studied, considering the development of water-saving agriculture in China. Based on the comprehensive evaluation index system of water-saving agriculture, the multi-level fuzzy comprehensive evaluation model was established and the evaluation theory and method was optimized. The results show that the water-saving agricultural development in Weihai is good and the established evaluation system and evaluation model are scientific and reasonable. The study provides the operational technology for the coastal water resources’ comprehensive evaluation of water-saving agriculture and has a guiding significance for the correct implementation of water-saving agricultural engineering management.

It has ten projects that the engineering corollary and the reconstruction of water-saving in large irrigation districts Included in the state plan.These projects have implemented more than ten years in GuiZhou. Through the collection data of large irrigation, dividing irrigation construction development into three stages. Study on the current situation of these projects, including irrigation, investment, construction and production efficiency etc. Focuses on characteristic,problems, development and target,The suggestions and countermeasures to reform in the future. The implementation of large irrigation planning, evaluation, decision-making for reference.

Regional agriculture water resources system is unpredictable, self-organized, nonlinear, determining the evaluation of regional agricultural water resources system resilience has certain difficulty. Taking Heilongjiang Land Reclamation Administration for example, through adopting fuzzy AHP-entropy method to confirm the index weight, agricultural water resources resilience was evaluated combined with DPSIR-TOPSIS model on the twelve farms. Results show that the key factor impacting the water resources system resilience is utilization of agricultural water, the further analysis shows that the water resources resilience of Farm Wujiuqi is the best, Farm Hongqiling is weaker, Farm Shuangyashan is the weakest. Research reveals the recovery state of local water resources system resilience, and provides a study mode for evaluating regional agricultural water resources system resilience on other regions in China.

Developing urban water resource scheduling management and decision-making support system to improve scientific and technological level of urban water resources scheduling management is an effective way to strengthen the urban water supply safety control so as to tackle such problems in urban water resource system as large-scale and complex structure, complicated scheduling management and large scheduling decision-making calculation. This paper, by taking the designing and development of raw water scheduling system in Shenzhen City as an example, analyzes operation demands of the urban water scheduling management system, designs the function structure system of the system, develops function modules of the system, describes the designing thought of key modules in the system development such as real-time monitoring module, waterworks water demand forecasting module and water resource scheduling model, and finally introduces the application of the system in Shenzhen water resource scheduling. This study provides technical support and backup methods for the construction urban water resource management and water resource scheduling management system in China.

By the use of the total situation of the Daling River and the actual data of four hydrographic stations in downstream reach including Shangwobao, Chaoyang, Yixian, Linghai in recent years, the sources of runoff and sediment load were analyzed in detail. Moreover, based on four kinds of graphs about runoff and sediment load, including annual graphs, average monthly distribution graphs, different reach graphs, and annual accumulation graphs, the characteristics of flow and sediment at four hydrographic stations were also well analyzed. The results obtained demonstrated that the sediment in downstream was carried by concentrated heavy rainfall in upstream. The annual changing trend of water flow and sediment was completely consistent. Annual distribution of runoff and sediment load were mainly concentrated in July and August.

Aiming to solve the problem of annual runoff prediction,the author fitted the factor one by one using the software 1stOpt,got the sequence of the related factors,extracted the key factors and fitted it with multivariate nonlinear curve fitting based on L-M algorithm and UGO algorithm;On the other hand ,the author predicted the annual runoff using the extracted key factors by the improved neural network based on L-M algorithm;With one of northern rivers runoff calculation example,it is proved the two methods were better than the traditional methods.And combination model is better in precision and effect when there are more related factors,providing a new and more practical method for annual runoff prediction.

According to the 43-year natural runoff time series from 1958 to 2000 of Linyi Station which is the main control station of Yi River, the inter-annual trend and periodicity are analyzed by using the linear tendency estimate method, Mann-Kendall method and wavelet analysis method. Then the characteristic indexes such as unevenness coefficient, complete accommodation coefficient, concentration degree, concentration period and absolute variation amplitude are selected to analyze the characteristics of the intra-annual runoff distribution. At last, the characteristics of inter-annual variation and intra-annual distribution of natural runoff at Linyi Station are obtained, in some degree, which can provide estimable basis for the reasonable exploitation, utilization, optimized allocation and sustainable development of the water resources of Yi River Basin.

In laboratory conditions, Two soil samples from Taiyuan and Datong in Shanxi province are classified to two parts (sand, silt-clay) respectively, and different soil particle size samples are selected for heavy metal cadmium adsorption experiment. The experimental data is simulated by Langmuir adsorption model, Langmuir interval parameter adsorption model is developed. The results show that the influence of soil particle size composition on adsorption capacity of heavy metal Cd is obvious. The proposed model can be used to simulate adsorption capacity of heavy metal Cd based on the soil particle size composition.

The research object is raw water from Xiao gan, Hubei. Through static experiments, the effects of ozone, Potassium permanganate, and the combination of both to remove the turbidity, color, CODMN, Persistent toxic or harmful pollutants removal efficiency. Through comparison, the combination of ozone and permanganate is the most effective; with the coagulant 30 mg/L, permanganate 2.0 mg/L, and ozone 1.5~2.5 mg/L, all of the three substance achieve the best result. Respectively,turbidity,90%、color87.4%、CODMN82.1%、Persistent toxic or harmful pollutants73%, The permanganate and ozone water treatment is a very effective composite technology.

Initial geostress is the main source of force which influences the deformation and stability of underground powerhouse. Based on the geological conditions and measured geostress data of Yangjiawan underground powerhouse , considering the controlling factors of gravity and tectonic, 3-dimensional finite element method is used to inverse the initial geostress of this area ,which makes comparative analysis with measured data. The analysis result indicates that the action of the horizontal tectonic plays a dominant role in the underground powerhouse, and the geostress gives priority to NNW horizontal geostress which intersects river with large angle; Through comparison between geostress inversion schemes, it is found that the three-situ stress measurement inversion scheme which is close to underground powerhouse is better than other schemes because its calculated result is similar in values and directions with the measured result; The regional stress field obtained by inversion scheme is highly accurate which lays the foundation for layout and stability analysis of underground powerhouse.

The static load, which the water project bear is large，and multiple structures are narrow and deep mostly, so the use of large span structure is restricted at a certain extent. The span of concrete arch aqueducts are mostly under 100m in the domestic, and the number of concrete arch bridge in transportation industry, whose span is more than 100m, is only 199。Water conservancy project in Central Guizhou has six concrete arch aqueducts, whose span are above 100m. Both span and lifting weight are pioneer in water conservancy industry，and at the same time the construction method，such as the precasting，cantilever steel arch and composite floor stand and other are used here.The successful implementation of the six aqueducts will provide a reference for the design and construction of large span arch aqueduct water industry，and will promote the long span arch (bridge) groove。

Abstract:This paper in view of the shortcomings of brittleness and poor toughness of the exist concrete,using the advantages of the CNFs,conducting a exploratory study of the toughening and reducing brittle of the CNFs concrete.Through the orthogonal experiment to optimize the preparation of nanometer arbon fiber high strength concrete is obtained the optimal mixture ratio,analyzed the influence of CNFs for mechanical properties of concrete,and discussed its optimal dosage.The test results show that the compressive strength and splitting strength of 28d of high-strength concrete all have varying degrees of increase while containing the reasonable dosage and scattered good CNFs,and can improve the tensile strength of concrete and CNFs have good crisp toughening effect.

this paper targets on Dongergou tailing dam in Xunyang County, the initial parameters were determined depended on experiences, while the kinetic and static parameters of materials were obtained by tests. E-B model was applied to static calculation, while the equivalent viscoelasticity constitutive model was applied to kinetic calculation, and Sweden slice method was used to calculate the stability. The results of static analysis show that the tailing dam will remain stable under the static state, and the longer the length of dry beach is, the more stable the tailing dam keeps. With the certain seismic force, the largest responding acceleration values of the dam body all appear at the top. The horizontal responding accelerations at the top have no amplification effect, while the vertical responding accelerations are all obviously smaller than the horizontal ones. Combined with the actual conditions, the possibility of dam slope liquidation is really low, so the dam body can not liquefy. The safety factor of kinetic slope stability is 1.26, which indicates the slope of the tailing dam can still remain stable under kinetic state.

galvanized wire gabion groyne; design parameters; velocity field; velocity distribution

Water conservancy construction is a complex system engineering, implementation of green construction is the inevitable choice of China's water conservancy construction.This paper aims at combining total quality management (TQM) and green construction so as to formulate green construction management methods and measures of promoting green construction of water conservancy projects from four aspects such as total management, the human subject, key control and data quantitative standard. By comprehensive consideration, mobilizing the full participation, key controlling the main source of atmospheric pollutants emission and real-time monitoring and green construction assessment, so we can carry out the effective and timely rectification of green construction and guarantee the whole process of green construction keep pushing forward efficiently according to the PDCA cycle.

To establish a complete, scientific, practical hydropower enterprise standard management system, and the standards in the operation of the system has combined with the actual business of continuous improvement, is the small and medium hydropower enterprises to improve their management level, and ultimately improve the efficient way of economic benefits. How to construct the standard of small and medium hydropower enterprise management system, the small and medium hydropower enterprises in the production, operation and management to realize the standardization, scientific, modernization, combining the enterprise management experience, through the analysis of characteristics and management of small and medium hydropower enterprise requirements, proposes the method to establish the standard of small and medium hydropower enterprise management system.

　　When rural hydroelectric station using BDFG water turbine operate with three phase unbalanced loads ,it will cause active,reactive power and electromagnetic torque fluctuations.In this paper,the model of BDFG with unbalanced loads is derived based on symmetrical component theory,the impact of negative sequence voltage on the BDFG vector control theory based on PI controller.And then vector control of BDFG with IMC is presented.Theoretical analysis and simulated results shows that proposed theory and strategy is correct and effective.

In order to study shape of blade on the performance of pump as turbine, a single grade end suction centrifugal pump as turbine is chosen as research object. Different style blade are compared and analyst combining numerical simulation and model test, and study for the performance of pump as turbine. This study shows that the adoptive numerical simulation method can compute the performance of different flow accurately. The relative error of head and efficiency is 3% in design conditions, the relative error of head and efficiency are 5% and 8% high flow and small flow respectively. There is a good agreement between numerical simulation results and model test. Filing blade outlets get the best performance in the three style blade. However, the initial model is worst.

Methods are designed which consist of pumping station equipment maintenance standards system and institution ensuring system, five layer protective system, daily spot inspecting organization and the work flow, in view of the situation of pumping station equipment management, refer to conceptions of modern equipment management, combining with the experience of advanced equipment spot inspecting management. Implementation method of spot inspecting management is established in order to construct a spot inspecting management system. The system makes spot inspecting a better handle on the state of equipment and improves equipment reliability. In order to make equipment management institutionalization, standardization and standardization, the system lays a solid foundation of digitization of pumping equipment management and has guiding significance on modern management level of pumping station.