The need of rural domestic sewage treatment is increasingly urgent, especially rural decentralized domestic sewage treatment technology which is economy, efficiency and applicability. The subsurface infiltration system was appiled to treat rural domestic sewage in the paper, the design discharge is 0.4m3/d, the area of subsurface infiltration system pool is 2.4m2.The influent is real rural domestic sewage. The influence and effluence of 500 days were analysed, the results showed that the average removal rate of system on NH4+-N，CODcr，TN，TP were 57%，68%，44%，45% ．For these seasons，the system has extensive application prospect in rural domestic sewage treatment．

Abstract: Combining the characteristics of the problem of pure water’s quality evaluation, an evaluation model, based on combination weighting and TOPSIS methods is proposed. Firstly, the subjective weight is obtained by establishing fuzzy consistent matrix. Secondly, the objective weight is obtained by computing attribute importance degree after structuring a decision table. Finally, use TOPSIS method to sort the pure water samples. Using combination weighting method to determine index weight is more accurately reflect the importance of each index. The application results shows that this method can effectively solve the evaluation problem of multi-attribute decision making, improves the reliability of the evaluation of purified water, provides a new valuable reference to comprehensive evaluation system.

Abstract: Taking Wucheng county Dezhou as a studying area , using 3S technology to emplace sampling point , two field survey was carried out in 2011，Based on the groundwater TDS data of laboratory experiments, combined with the data of 1972，Inverse distance weighted spatial interpolation processing used ArcGIS. The results of the study show that: Spatial variability tendency of the groundwater TDS is evidently in the study area, the data from the southeast region of > 2g / L gradually increased to the northwest region of> 4～5g / L. Seasonal changes during the year significantly, the mean of spring is 2.628g/L, winter is 1.748g/L. Groundwater TDS show a downward trend compared to 1972, the average decline is 1.52g / L. The results have a greatly significance to Water Salinity Control and rationally exploit groundwater resources in the studying area.

Through on-site surveys, water quality analysis and simulation of pollutants' diffusion and migration law, we found that by the control of hydrogeological conditions, different areas of Jiaozuo has different groundwater pollution way. Hydrogeological conditions also affect the distribution and migration of contaminants in groundwater systems. In the Piedmont inclined diluvial plain areas, the main mode of contamination is infiltration-runoff diffusion. Although the thickness of the vadose zone is greater than in other regions, due to the permeability of the vadose zone is better, precipitation is relatively abundant, contaminants easily into the aquifer with the meteoric infiltration of surface water and precipitation , resulting in this area of shallow groundwater is more sensitive to pollution, the pollutant concentrations in the shallow groundwater than other region , After entering the groundwater, contaminants diffuse from northwest to southeast under the control of groundwater runoff ,in which the diffusion along the Da sha river line is the fastest . In the Piedmont handover depression, the height of capillary rise big, speed, and located in the groundwater flow's potential exchange place, so the dominant pollution effect is runoff-evaporation and concentration effect. The long-term evaporation concentration effect makes the total hardness overweight commonly. In the alluvial plain areas of huangqin river, underground runoff is weakly ，the vertical alternation role is strongly, so the rainfall infiltration and evaporation concentration is the main way of pollution. Under the influences of special hydrogeological condition, although total fluoride content in the soil is in normal level, but the fluorine pollution in the shallow groundwater is still serious.

For the optimization layout of irrigation pipe network, we use the genetic algorithm which is based on integer coding and combined with designer’s experiences.The proposed method is compared with interrelated method according to the application to a project design. The result shows that by using the method the optimal pipe network design plan can be easily worked out.

A stress-type multi-potential surface model with the same model parameters as those of Duncan E-B model is adopted to simulate the constitutive relation of low elastic modulus concrete. Slot excavation, mud of firm wall and concrete backfill are simply taken as one grad of loads in the numerical simulation of construction process. A 3-D FEM code is used to compute stresses and deformation of a dam reinforcement engineering. The results show that the Stress and deformation change of construction process can be reflected by the simplified process and the same general trend of principal stress as Duncan E-B and linear elastic model is gotten by the stress computed by multi-potential surface model. The stress computed by multi-potential surface model is between the results of Duncan E-B model and the line elasticity model and the stress curve is more smooth more smooth in the mid-lower of wall.

With the city river harnessing, the flow noise produced by river discharge structure seriously affected the life of residents nearby, yet the study on mechanism of producing and control of the noise were relatively less. Taking HunHe River as study object, monitoring of the sluice flow noise produced by three types of river discharge structure: rubber dam, flat flap gate and overflow dam were carried out and the noise changing of different types were measured under the same sluice flow condition. The results showed that the largest noise is rubber dam, the second is overflow dam, the last is flat flap gate under the same flow condition. The sluice flow noise belongs to medium and low frequency noise, and the longer distance to the discharge structure was, the smaller noise value would get.

It is assumed that deep-buried circle tunnel is axial symmetry, fluid flow field and elastoplastic solutions were obtained under considering fluid flow body force. Analysis of the changes of the fluid flow field, plastic zone and leakage flow, the exploration about the impact of the lining permeability were obtained through different permeability coefficient ratios of the lining and surrounding rock based on the elastoplastic solution. A case result showed that the head of lining and the surrounding rock decreased rapidly from inside the tunnel to outside when the lining was permeable material. The change of the fluid flow field was no longer significant when permeability coefficient ratio of the lining and surrounding rock was beyond 50. Leakage flow increased gradually along with the permeability coefficient ratio of lining and surrounding rock increasing, and when the ratio was beyond 50, leakage flows keep a stable value. For the free flow tunnel with initial plastic zone existed, the plastic zone of impervious lining was larger than the plastic zone of pervious lining, the plastic zone decreased gradually and stabilized eventually along with the increasing of lining permeability. For the pressurized tunnel with initial plastic zone existed, the plastic zone would increase sharply based on the initial zone as increasing of lining permeability and keeping tunnel pressure constant as well. The plastic zone uncharged as permeability coefficient ratio of the lining and surrounding rock was beyond 50. For the free flow tunnel without initial plastic zone existed, lining permeability could not change the plastic zone as keeping tunnel pressure constant.

Abstract: Release flood waters system is an important part of reservoir power station building, it has operated for the purpose of whole project discharge,generally which was composed of upper and bottom outlet, its minimum structure size were determined by the reservoir characteristic stage and water release when discharging flood. Flood-discharge tunnel (bottom hole) is pressure tunnel which was used diversion in the construction period,and its flow was controled by service radial gate at the exit of the tunnel. In this paper,the discharge capacity of the flood-discharge tunnel was calculated through two formula,one is Pressure hole discharge formula,other is Brake orifice discharge formula.On the basis of the minimum size of the bottom outlet was determined by the Pressure hole discharge formula,when the arc gate at local opening conditions, in different water levels and exits of different opening, the flow was calculated by the two formulas, and the results were compared with the physical model test.Analysis indicates that the arc door opened by local gate orifice flow formula of the calculated results and the model test results are in good agreement, and the results can be provided for the similar engineering hydraulics calculation reference for practice.

With regard to the wedge stability against deep sliding of gravity dams, the reliability indices of sliding body, resistant body and the system are calculated by means of first-order second-moment method and equivalent linearization method. The traditional safety factor is endowed with general meaning, and the system relibility index is calculated using the method of Monte Carlo. The relationship bewteen relibaility theory and safety factor method is discussed. The results show that the single safety factor can not completely refelct the safety level of stability against deep sliding of gravity dams. It’s suggested that with the combination of relibaility theory and safety factor method, the partial factor should be introduced into the safety factor method and the general safety factor can be used in the design, which can be used for reference in the revise of Design specification for concrete gravity dam.

The pore water pressure is one of the projects which must be monitored in geotechnical engineering. Based on the consideration of the groundwater level, the formula to determine the excess pore water pressure according the pore pressure gauge has been amended. Combined with the pile installation in chimney zone of a power station, the excess pore pressure variation with time during installation of PHC pile is analyzed. The analysis points out that it is necessary to pay attention to the rate of the installation of PHC pile and the nearby piles to avoid the sudden change of the excess pore water pressure, and consequently the nearby soil and buildings produce larger deflection, even damage. The analysis provides a reference for the design and construction of similar projects.

Proposed in this paper is quantifying distribution network loss reduction space of every influencing factors through subjective and objective evaluation.First,the relationships between line loss categories are generalized and a framework of distribution network energy efficiency evaluation is established.Then, AHP-gray relation algorithm analyzes the correlation degree between network loss factors and line loss rate.Finally,the study builds GM(1,N) model through strongly-correlated loss factors for predicting ideal line loss rate and calculating respective and comprehensive loss reduction potential. Case analyses show that improved gray relation method makes the accuracy of prediction higher and requires fewer samples and less computation,so that it provides a guidance for the energy-saving evaluation and planning of power network.

Abstract: Firstly , a model was established to solve the optimization problem of hydropower station. Based on the description of artificial bee colony algorithm, in order to avoid the deficiency of local search ability in standard artificial bee colony algorithm, a new algorithm was designed, which searches the initial solutions by opposition-based learning method, choices the adaptive proportional selection strategy to supersede roulette method, updates the location of the nectar source by exponentially distiributed mutation strategy. The improved algorithm was used in the optimal operation of Xin’an jiang Reservoir by MATLAB. The result indicates that the improved algorithm has stronger global optimization ability and the result is better than the traditional artificial bee colony algorithm and paticle swarm optimization.

For the large flow and medium low water head in long distance diversion tunnel of hydropower station , this article through the simple cylindrical surge shaft, impedance surge shaft, double chamber surge shaft, overflow surge shaft, differential surge chamber surge shaft five types of comparison study, the results show that impedance surge shaft water level fluctuation amplitude is small ,surge shaft height than simple cylindrical surge shaft is lower, the double chamber surge shaft water chamber volume is very big and project amount is larger, usually selected impedance surge shaft type.

For the problem of WFZ power plant generator slip ring in operation, submitted proposals by comparing the selected programme and the slip rings were processed, analysed the effects of slip rings, gave advice in the future.

The paper summarizes Zhejiang Province Small Hydro Upgrade Pilot Project characteristics, implementation procedures and project constrains. On that basis, the paper analyzes project management mode, key points and control methods. It also gives three suggestions to improve project management.

Small hydropower is a green and renewable energy, which get clear eco-efficiency, and small hydropower in rural mountain areas has become an important pillar of economic and social development, an important source of local revenue, an effective technology to farmers' income. Xingyi City has the typical Karst landform, electric power facilities and infrastructure is relatively backward, power development is extremely slow, and restricted the local economy development. Rational development of small hydropower in Xingyi City, not only to strengthen local agriculture, water conservancy, energy infrastructure, improving the ecosystem, population, resources and environment to coordinate development, but also for the small town to realize Post-Transcendent, span type development lays solid foundation, realize sustainable development of society.

The three dimensional model of double suction centrifugal pump is established by the laser scanning technology. By using CFD, the water flow of pump is simulated, and the position which is prone to abrasion is determined, and the abrasion depth is estimated based on the experience formula, which is useful for the abrasion resistant work of pumping station.

The current mode of irrigation in Sanjiang plain area is the main well irrigation，but there are still groundwater overexploitation problem, while the transit surface water is not fully utilized. This article is aimed at current existing problems of irrigation mode in Sanjiang plain, put forward to improve surface irrigation water utilization rate, and put forward the optimal allocation of water resources model. Hope to Sanjiang plain irrigation area water resources optimal distribution and production practice have reference significance.

Abstract: The typical channels in GANFU PLAIN irrigation area in Jiangxi province selected, through to comparative the flow velocity, flow rate and roughness of the channels before and after removing weeds, analysis of the effects on channel capacity and water quality in irrigation area by water. The results show that, after the implementation of mechanical weeding ,the flow velocity and flow rate of channel were increased substantially, and roughness was decreased substantially, the channel capacity was improved significantly, while the main water quality indexes were improved obviously.

A leaching-pond experimental project was carried out in Jingzhou City, Hubei Province to research the effects of controlled drainage on groundwater table. And used DRAINMOD model to simulate the designed experiment schemes. The results showed that the numerical results of the groundwater table from DRAINDOD model were quite similar to the practically measured results during cotton growth period, DRAINDOD model can effectively simulate and predict the character of water table under controlled drainage in leaching-pond experiment. Controlled drainage can effectively adjust underground water level.

This paper presents the current status of rural water conservancy construction and the overall requirement of rural water conservancy modernization in Jiangsu. Its main object and the construction standard are also put forward. Its main task, important project, subarea manage mode and safeguard measures are analyzed.

There are many riverlets in Liwan District , the flood drainage standard of the existing riverlets is low. According to the demand for research on riverlet regulation in Liwan District, a hydrodynamic mathematical model for the river network in Liwan District is established based on one-dimensional Saint-Venant equations, the drainage conditions of different riverlet regulation schemes are simulated and analyzed. The numerical results indicate that the drainage standard of 5% frequency flood is not satisfied for most of the riverlets in Fangcun area. After the construction of Saiba sluice, Niuduwan sluice, Kuipeng sluice, Huadi Southern sluice and Northern sluice, and Guangfo sluice, the drainage water levels of the riverlets which have hydraulic relation to these sluices and Huadi river drop obviously, the construction of these sluices can obviously improve the flood drainage capacity of Fangcun area. It is necessary to build these sluices for flood drainage in Fangcun area.