Based on the 2012 actual research of Madihao irrigation，by selecting the typical channels and typical fields and estimates channel water utilization coefficient and field water utilization. Then adopt for the comprehensive measurement method to calculate the irrigation water use coefficient .According to the outcomes,we can see the result of selecting typical channel is 0.472 is similar to the Head-End measurement method which result is 0.478 . So it has a high practical value for the irrigation.

For the problem of high sediment concentration Yellow River water isn’t easy to use for drip irrigation, used hydrocyclone separation technology and screen filtering technology to separate the sand. According to the properties of Yellow River, Rietema equation was used to calculate the hydrocyclone dimension in theory. A Mixture liquid-solid multiphase flow model combined with the kinetic theory of particle flow was used to simulate the high concentration water-sand-air three-phase flow in a hydrocyclone. Analyzed the inner flow field and improved the structure of hydrocyclone. The actual application result indicates that the multistage sand separation system composed by improved hydrocyclone and the screen filter can separate the sand of Yellow River water effectively. The improved system is also durable and easy maintenance. The system can provide security for drip irrigation working stable and efficient.

Abstract: Using monthly ground-based meteorological observation data at 632 sites in China during 1961-2012, the potential evaporation (PET) is calculated using the UN Food and Agriculture Organization (FAO) Penman-Monteith model，and then the humid index is reconstructed from the PET. With the method of Inverse Distance Weighted，Mann-Kendall，etc，the temporal and spatial variations of PET and different time scales’ humid index are discussed. The results show that the total PET in China ranges from 600mm to 1400mm on an annual basis from region to region, with the maximum in Northwest where significantly decreasing trend. and the minimum in Northeast where significantly increasing trend. In terms of grades of humid index from Chinese Climate Classification Criterion, China is classified into five zones, and there was a significant decrease in the area of the hyper-arid zone in the past 52 years. There are significant differences on the spatial distribution change between different time scales’ of humid index, and in the Western where exhibits increasing trend at the seasonal and annual humid index, that is the same with decreasing area of the arid zone and hyper-arid zone.

Water resources are important strategic resources.In this paper, on the basis of considering the characteristics of water resources and combining with the specific circumstances of the four provinces,established water security evaluation index system of the four provinces,index system involved in population, economy and society, resources,environment from four aspects, used the analytic hierarchy process (AHP) to determine the weight of each index and made an evaluation of the four provinces of water security situation, set up four critical value of the index at the same time, divided the Jiangxi, Hubei, Hunan and Anhui’s level of the water security situation according to calculation results of sample model of the four critical value.The comprehensive evaluation results of 2005 ~ 2011, Jiangxi province’s water security situation is better, the second is the Hunan, Anhui is worst. Finally,four provinces were compared and analyzed from the population, economy and society, resources , environment. The evaluation results prove the feasibility and effectiveness of the method, it has certain application value in regional water security evaluation.

Golden mussel (Limnoperna fortunei), originating from water bodies in south China, is a filter-feeding species of freshwater Mytilidae. The veligers of golden mussel enter into water transfer tunnels through water intake, and densely attach on tunnel wall, causing bio-fouling and installation corrosion, increasing water transfer resistance, and even clogging in pipes. Putrefaction of dead mussels also causes water pollution. Investigation of golden mussel bio-fouling in pipeline of the Dongjiang Water Source Project, Shenzhen was conducted during the overhaul periods of the project. Attachment density of golden mussels was investigated from the water intakes to the end of the pipeline. Investigation and experiment was conducted in the rivers supplying water: the Dongjiang and Xizhijiang rivers. Effect of sediment settling on restraining attachment density of golden mussels has been analyzed based on the tunnel investigation and field investigation and experiment. It is indicated that in the water transfer tunnel the attachment density is significantly related to sediment settling. The density was very low at the sections with much sediment settling. Moreover, the mortality of the attached mussels was very high. However, the density was much higher at the sections with less sediment settling. The similar effect of sediment settling on restraining golden mussels’ attachment was also revealed in the field investigation and experiment. The experimental result indicated that when the amount of sediment settling increased 5 times, the attachment density reduced 80%. Therefore, sediment settling is considered as an effective strategy to control golden mussel bio-fouling in water transfer tunnels.

As the missing value in daily water consumption series is generally determined by subjective judgment, a combined interpolation method based on grey theory was proposed. An autocorrelation method was used to analyze the daily water consumption series to determine the series related to the missing value. With the daily water consumption series before and after the missing value, grey theory was applied to obtain backward and forward interpolation estimation, respectively. Two values were optimally combined to achieve the estimation of missing value. Case study shows that the proposed method has a higher prediction performance than the average value method.

Storage scale of water is the basis and the key of the planning and construction of water supply project of the city, is the important index of water supply capacity of city water supply project. Based on analysis of Lianyungang City water supply source, according to the Qiangwei Lake engineering functions and tasks, research the effective storage of Qiangwei Lake from the aspects of water supply project period, water index and water supply mode, provides the scientific basis for water project construction Qiangwei Lake Lianyungang City Planning; and according to the ecological wetland rose lake pollution characteristics of a study on the ecological water purification project impounding specific scale method, which can provide reference for similar project planning and design.

Abstract: By adopting the basic tidal current equations, the sediment continuity equation and the bed deformation equation under the boundary fitted coordinates, A 2-D mobile boundary non-constant tidal current and sediment mathematical model was established, in which the effect of waves on the current sediment-carrying capacity. On the basis of the model validation, the study on the numerical simulation of the tidal current and sediment of the reclamation planning scheme of Area A beach of Silver Lake Bay was carried out. Research results show that the implementation of the reclamation planning scheme of Area A beach of Silver Lake Bay plays very little influence on the whole flow velocity, flow state, and scouring and silting of Huangmaohai Sea. Considered from the tidal current and sediment, the planning is feasible.

Abstract: The 11 third level aquatic eco-functional zones of Qinghe River and Fanhe River basins in northern Liaoning Province were selected as the basic evaluation unit in this paper, the analytic hierarchy index system of aquatic ecosystem health assessment was constructed in accordance to the characteristics and connotation of aquatic ecosystem health and the ecological features of the research areas. The Improved Analytic Hierarchy Process(IAHP) and Fuzzy Mathematics Model were adopted to evaluate the aquatic ecosystem health of Qinghe River and Fanhe River basins. The assessment results indicates that among the four third-level aquatic eco-functional zones of Fanhe River basin, three of them are in “healthy” state (IV-5-2, IV-5-3, IV-5-4) and one is in “in-general” state (IV-5-1). While among the seven third-level aquatic eco-functional zones of Qinghe River basin, one is in “healthy” state (IV-5-11), two are in “sub-Healthy” state(IV-5-10, IV-5-12), two are in “in-general” state (IV-5-9, IV-5-13), and two are in “illness” state (IV-5-8, IV-5-14). the aquatic ecosystem health assessment which combines with the scientific assessment model and the aquatic eco-functional zones can provide scientific basis for comprehensive ecological treatment in river basins.

It is imminent to carry out the eco-friendly operation of reservoir to mitigate the adverse impact of riverine ecosystem with the development of basin hydropower. Based on the summary of worldwide research literature, the paper outlines the definition and basic principles and points out the research focus and existing problems of the eco-friendly operation of reservoir. According to national policy of water resources conservancy in the 21st century, the paper prospects the direction of the eco-friendly operation of reservoir.

The hill area on the northern of Yin mountain is a semi-arid ecological fragile farming-animal husbandry areas, the damage to vegetation and soil –water erosion are serious. To change the situation of ecological environment, has carried out a series of vegetation cover constructions, and had already achieved some positive results. So this paper, selected Guyang country as a study, used the methodology of comprehensive evaluation of soil quality to analyze the effect of different vegetation to soil quality. The result showed that the soil quality of different vegetation types were increasing, Both physical and chemical soil qualities enhanced significantly. Constructing vegetation in the area improved the condition of physical properties and chemical properties ; The soil quality of Caragana Microphylia Lam. plot had a higher value than other vegetation plot, on the contrary, the Caragana Microphylia Lam. plot had a lower value. From the construction of vegetation in the area, we can know that planting Caragana Microphylia Lam. has an important function on improving soil quality.

The comprehensive evaluation for sewage treatment projects involves lots of qualitative and quantitative analysis. To more scientifically reflect feasibility and assess overall efficiency, this study built a comprehensive evaluation index system and evaluation model for a sewage treatment project. By introducing and applying matter-element extension method, the case project was comprehensively evaluated. Empirical study indicated that the application of matter-element extension method in comprehensive evaluation for a certain sewage treatment project could reveal actual condition of the project more scientifically, help make clearer comparison among assessment results of different plans or projects, and show the subjection degree of each index to the comprehensive evaluation level. The successful application of matter-element extension method in this study suggested a promising application trend in comprehensive evaluation for sewage treatment projects.

Abstract: Groundwater numerical simulation is widely applied in many fields related to groundwater. Its results, whose accuracy can be effectively improved by parameters sensitivity analysis, are very important to many decisions. The original local sensitivity analysis only considers the influence of a single parameter, ignoring the interactions between them; later, global sensitivity analysis which considers the interactions is developed, but under the condition of multi-parameters and multi-levels, the time of sampling is so excessive that the operability is poor for the numerical model. In this paper, the uniform design method is introduced into the parameters sensitivity analysis of groundwater flow numerical model of Lindian county, Heilongjiang province. 7 parameters of the model are considered, and each parameter has 16 levels. Just with 16 sampling, the purpose of parameters sensitivity analysis is achieved.

According to the multiple time-scale characteristics analysis of hydrological time series, the mode decomposition is made by empirical mode decomposition (EMD) and ensemble empirical mode decomposition (EEMD) method. In this paper, the EMD was compared to EEMD based on a test function firstly, and which shows the superiority of EEMD in solving the mode mixing problem. And then, the EEMD and EMD method based on least squares support vector machines (LSSVM) signal continuation were applied to analyze the annual rainfall sequence of Hubei province. Verified by the results of wavelet analysis, the EEMD method, as a kind of new signal processing method, can obtain more accurate characteristics of annual rainfall series than EMD. Based on this, it can be found that the presented method can be widely used for the multi-scale analysis of hydrological time series.

Based on the observed daily temperature and precipitation of 87 representative meteorological stations from 1961 to 2010, annual, seasonal, and decadal characteristics and variation trends of temperature and precipitation in the Yellow River basin were analyzed by using statistical methods of average, linear trend and moving average. The results show that the annual mean temperature is 6.96℃ in the Yellow River basin. The temperature in the east presents higher than in the west, and the temperature in the south is higher than in the north. The variation in annual mean temperature presents a fluctuating upward trend at a trend ratio of 0.03℃/a. The temperature increased more significantly in winter than in summer. The annual mean precipitation is 448mm in the Yellow River basin. The spatial distribution of the precipitation presents a decreasing trend from the southeast to the northwest. The annual mean precipitation takes on a non-significant decreasing trend at a trend rates of 0.97mm/a. The seasonal variation trends of increase or decrease are not obvious, which is more complex.

In order to study the strength and dynamic damage characteristics of concrete under natural state and water-saturated state ,the uniaxial compression test have been carried on different strain rates (10-5/s、10-4/s、10-3/s、10-2/s), the dynamic damage of concrete under natural state and water- saturated state have been comparatively analysised based on damage model. Results show that the damage value of water saturation concrete increases obviously under the high strain rate, and its strength increases more than the concrete of natural state; Within the scope of low strain rates, the increase rate of the strength of natural state concrete was lower than those of water-saturated, the damage value of natural state concrete is maximum when strain rate is 10-5 /s.

The present situation and problems that will come with the development of the price information sharing of Hydraulic engineering are analyzed in details, and the solution based on windows Azure is proposed in this paper. To take the dates of artificial prices, material prices and the permanent equipments′ prices of water conservancy project as an example, the Hydraulic Engineering price information cloud system, having the functions of inputting, quering and analyzing the price dates, was designed.

Water-conveyance Tunnel of Qinling Mountain which crossing the ridge of Qinling Mountain has many complicated geological conditions such as extending in far distance, buried deeply, developing fault structure extremely. These conditions have a considerable impact on the design and construction of the project. CSAMT is an effective way to probe the characteristics of geological structure in depth. The distribution of 36 faults has been confirmed by making a contrastive study on the probe's results and the actual construction situation. The research shows that CSAMT has good effect on probing the morphological characteristics of geological structure in depth and the water content of the tunnel and this method can be extended and used in other prospecting of the fracture of the tunnel which extends length, buried in depth.

Abstract: Basing on the engineering practice，the seepage catchment system composed by no-fines concrete pipe with different permeability coefficients and filter material with different size was studied herein,the influence of sediment laden flow with certain concentration on effect of seepage catchment under different conditions were analyzed.Both the research and analysis showed that :the seepage catchment effect of the reservoir using a specific seepage collection depends primarily on the level of working head ,the time of sediment-laden flow ,the thickness of deposition on the surface of erosion fillet and other factors .For different seepage catchment systems, the greater comprehensive permeability coeffi- cient, the greater influences on effect of seepage catchment by the thickness of deposition.These conclusi- ons can supply a theoretic and practice basis for the technical problems of design, construction, operation in reservoir seepage catchment engineering.

The vibration and swing of the No.2 unit of Lechangxia hydropower station were much larger than permitted rules during the trial operation and the reasons were analyzed. Mechanical and electromagnetic unbalanced force was eliminated when the dynamic balance test was finished by using influence coefficient method, the stability test showed that the swing and vibration were within the reasonable range and the unit operated stably under on-load conditions.

At the earlier stage, the function of Shitouhe Reservoir was dominant in irrigation while flood control and power generation secondary. Since 1996, the function has been changed into supply of water to cities with irrigation and power generation becoming secondary. With the completion of water diversion project from Hongjishi River, such changes have a great influence on No.1 hydro-turbines and urgently require reform of the hydro-turbines for increase of capacity efficiency to bring into full play of the reservoir function with water energy alterations, and solving the problems existed during the long-term periods. Based on the two requirements, this paper studied the ways for transformation, proposed the feasible reform scheme, and designed concrete procedure and methods. The results have provided implications for the reform of old reservoirs with similar or same matters.

The T type bifurcation pipe and connection pipe impedance surge chamber model was studied by numerical simulation. Using numerical simulation method, the computed surge impedance coefficient and model test experience value is consistent, Show that the CFD method can be applied to the design of surge chamber. Trough compariation ,show that surge chamber connecting pipe length affects only the surge chamber friction loss, not affect the local resistance loss.

For long-distance water pipelines in cold regions, setting water hammer protection outdoor is very difficult.In order to protect these pipelines,we proposed the method of air vessel as water hammer protection , described the operating principle and the mathematical model of air valve and air vessel, as well as their boundary conditions were conducted. Combined with a specific case, the protection effect of the two different measures were compared through numerical simulation with the characteristic line method. The change of cavitation volume was calculated when vaporization appeared. The results show that the air vessel can effectively suppress the pressure fluctuations of pumping accident, it is an effective measure to prevent water hammer.

According to (GB50265-2010),the design water level out of pool of drainage pumping station should choose the mean water level of 5 ~10 year flood in drainage receiver. Analysis of the specific conditions of weather & hydrology characteristics, flood encounter and drainage project in Chengxi embankment of Dongting Lake, we concluded that design and operation water level out of pool of drainage pumping station should adopt 10 year in the annual maximum daily rainfall corresponding 3 day average level, and refer to the warning level of local pumping stations. And it would give guidance and reference to determine planning and operation scheduling scheme in drainage pumping station of Dongting Lake and similar area.