For exploring the influence that the reservoir construction playing on ecological environmental of reservoir downstream river, this paper, based on the thought of the RVA（Range of Variability Approach）, chose a serial of indexes which reflected the change before and after the reservoir construction to establish the ecological risk assessment index system of reservoir downstream river. And based on quantifying the risk index and determining the weight of each risk indicator by the risk index method and RVA, according to the fuzziness of the ecological risk assessment and the cognition of human, it quantified the ecological risk to 5 levels and then established the ecological risk fuzzy comprehensive evaluation model of reservoir downstream river for the evaluation of risk value. The case study indicates that, this method can provide the quantitative result of downstream river ecological risk comprehensive evaluation value. This evaluation method provides guidance to the reservoir ecological risk management and evaluation work, contributing to sustainably developing and utilizing the rivers and perfecting management system of ecological environment.

Based on the detected water quality indexes of Jiaozuo area from 88 monitor holes,this paper evaluated nine groundwater quality indexes which included nitrate nitrogen,total soluble solid,sulfate,hardness,hexavalent chromium,fluoride,nickel ion, ammonia nitrogen and chloride by the fuzzy comprehensive evaluation method.The water quality level of shallow groundwater were finally established by the way of establishing factor set,evaluation set,membership set and fuzzy weight vector matrix, and carrying on fuzzy comprehensive evaluation.the results shows that the shallow underground water quality of research area is poor,pollution rate is as high as 81.82%.Among of them, the poor five categories of water quality reaches as high as 26.14%,mainly distributed in northern Dajiazuo Village,Xiaoshang Village,Beijing Village and south of Ren Village,Xiaowang Village and Nanli Village,which are consisted with the distribution of industrial pollution sources, agricultural pollution sources and domestic pollution sources.

Songnen Plain is a large water storage basin of a multi-layer stacked structure including widespread distribution of phreatic and Quaternary and former Quaternary confined water. Each aquifer groundwater has different hydrochemistry that is affected by geological, geomorphological and hydrogeological conditions. Quaternary phreatic widely distributed native environment is poor, vulnerable to artificially pollution, in which fluoride is higher than the standard in the central of the Songnen low plains, easily lead to fluorosis, not suitable for drinking. Quaternary confined water is mainly distributed in the central of low plains and eastern high plains in Songnen Plain, in which fluorine is higher, not suitable for drinking in low plain area and lower, suitable for drinking in high plain area, influenced by the native environment. Former Quaternary confined water mainly distributed in vast areas outside the western piedmont sloping plain, water quality is better, and fluorine meet the drinking water requirements, but the amount of water changes lager. Neogene Daan group and Paleogene Yian group confined water is abundantd and depth is large, supply conditions is poor, that is suitable for drinking, but controlling exploiting in low plain. Cretaceous aquifer group, which has better water quality, lower fluorine in high plain is suitable for drinking, but the distribution is uneven, so to scientific development. It is proposed that scientific and rational development and utilization model of groundwater in Songnen Plain, provides the basis for government decision-making.

Reservior early-warning is of important theoretical significance and practical value for comprehensive utilization of water resources and sustainable development. At present, most reservior early-warnings are qualitative analysis and hardly any quantitative one. By reference to previous studies and red line of control the total water use, this paper firstly proposed the way to quantitatively determine alert line and early-warning region on different function reserviors, and firstly gave the defination and method of reservior early-warning.Taking Xiaozhushan Reservior in Jiaonan city for exammple, in accordance with hydrological characteristics there, this paper prolonged early-warming time to non-flood season, and realized warning management. The results accorded with the pratice and gave technical support to realizing the most strict water resourse management.

In order to improve the precision of the ground water mathematical model, and reduce the error which caused by hydrogeological parameter’s uncertainty, we need to analyse the hydrogeological parameter’s sensitivity of numerical simulation model. This paper based on the identification and verification of an irrigation district’s groundwater flow numerical model, using factor transformation method to do the parameter analysis with permeability coefficient and specific yield of aquifer, atmospheric precipitation infiltration recharge coefficient. The results of the study show that, the ground water level is most sensitive to permeability coefficient, and then is the atmospheric precipitation infiltration recharge coefficient. For the large variability of aquifer lithology in valley area, the ground water level is more sensitive than any other regions. Through the parameter sensitivity analysis we can screen out the most uncertainty factors of the numerical model, thus to avoid the blindness of model parameters calibration, and improve the reliability of the regional groundwater resources evaluation.

The bad hydraulic performances such as uneven flow distribution in three tanks, big fluctuations of water surface and big inlet velocity were found through the hydraulic model test research on the original sand basin. In order to overcome the shortages, the original sand basin has being improved by using a adjusting flow board in forepart basin to adjust the flow entering sand basin. Experimental results indicate that optimal design sand basin had better hydraulic performances. In view of inability to get the test data completely due to small velocity in sand basin, optimal design sand basin was studied by means of numerical stimulation using 3D - standard turbulence model. The numerical results were in good agreement with experimental data and the velocity distributions were indicated.

Abstractor: The security, stable operation and water efficiency of the channel lining are directly connected with the amount of frost heaving. The factors of influencing for the amount of frost heaving include channel soil temperature and the change of frost depth. Through test observation during two winters of from 2010 to 2011 and 2011 to 2012 in Donggang irrigation, the related amount of frost heaving, the change of frost deep and soil temperature in situ data had been obtained. Then the law of influence is studied on different thickness of polystyrene board insulation in channel lining with above three changes. On this basis, the thickness of polystyrene board insulation suitable for channel lining in Donggang irrigation is selected, which is supplied for the design of channel lining in similar irrigation.

Abstract: In low temperature season intercritical period, insulating for the pouring cube surface is an important part of temperature control and crack prevention，the insulation effectu always attracts a lots of attentions. In the past,the actual temperature inside measured by point thermometer and calculated slab temperature is always selected to establish objective function to feedback the effect of heat preservation quilt, while point thermometer is single and buried in the inside of pouring cube,so the result of feedback exists some randomness and its accuracy is questionable. In this paper, combined one concrete dam under construction in southwestern China, distributed optical fiber in the typical pouring cube surface with on-line real-time is buried to inspect the state of temperature during the intercritical period in low temperature season, then the 3-D FEM in computer technology and the inverse analysis method is used to feedback the insulation effect of the pouring cube surface. The calculated equivalent surface heat convection is 8.11 , and the analysis shows it meets the requirement of construction technology that the surface heat convection is no larger than 10 after covering 5 heat preservation quilt.

Taking Lizhou RCC anch dam in west area for an example, based on three-dimensional static analysis, a relatively study of generating artificially seismic waves,model shape and natural frequency of the arch dam was analyzed .the time history methods was adopted to analyzed response of arch dam under the condition of earthquake.The results reveals the law of dynamic stress,dynamic diaplacement of the dam body;the aseismic safety of earth-arch dam is evaluated.Thus,it provides reference for design of practical engineering.

The number of reservoir in Guangdong are numerous. But there is lack of an effective integrated management system to the reservoir information collection and management. In this Paper, a reservoir information management system was developed based on the asp.net. Tthe system architecture use B/S structure. System user interface was developed by Visual Studio 2010. Database system is composed of SQL Server 2008 r2 for background development. Application testing shows that the system is convenient to use and inquires quickly, with practical and promotion value.

Comprehensive evaluation of earth and rockfill dam earthquake damage involves many factors which are associated with each other. In this paper we first establish a fuzzy evaluation indicator system, then making use of the expert evaluation method to determine the weight, using the membership function to ensure the membership degree, and finally we select four reservoirs in sichuan province as a case using fuzzy mathematical method to carry on the calculation, accomplishing the comprehensive evaluation. The results show that the method can objectively reflect the earthquake damage reservoir danger degree, easy to use, providing a certain technical support for earthquake damage reservoir treatment.

The filling silt in the dam and sand under the dam foundation of Yuqiao reservoir can be easily liquefied when earthquake happens, which probably leads to collapse, it’s the key of dam safety management. In this paper, the most dangerous section 1+150 was chose to be analyzed seismic hazard of the dam. The liquefaction evaluation of silt and sand was made according to the results of the standard penetration tests in-situ and dynamic tri-axial tests indoor; the results of them were also compared. The conclusions were drew to the dam stability with the effective dynamic stress method: some sections of the dam would be liquefied under earthquake including the filling silt under upstream shallow water of the dam, the sand, even the gravel under the dam foundation. The dam could be partly cracked and upheaval, but it’s still stable as a whole and stone materials could be used to press the slope.

In order to study the impact which atomized rain caused by flood discharge has on the stability of slope on the left bank for Baihetan hydropower station, through analyzing the geological conditions of dam site, the computational condition of slope stability are determined. Based on the results of 3-D saturated-unsaturated seepage computation by finite element method in the process of a typical atomized rainfall caused by flood discharge, considering seepage pressure of the transient saturated zone, negative pore water pressure of the unsaturated zone, and the softening effect which will reduce the shear strength of saturated structural planes, this paper computes the vertical displacement, stress distribution, shear strain rate, and the plastic zone of the left slope at different moments using the software FLAC3D. Through the comparison with natural state, rainfall infiltration will significantly raise pressure head of the shallow slope, transient saturated zone with large scale will appear in the slope toe. The value of deformation, stress, and shear strain rate will increase significantly compared to the natural state. Rainfall infiltration could also induce damage of the deep slope slide, which will worsen stability of the local slope.

The secondary development of the VBA was adopted to the processing and analysis of the governor static characteristics experimental data in this paper. The description focus on the calculation of the static characteristic parameters and the reliability analysis of the experimental data, through taking a power plant static characteristic test as example the verification was conducted to Provide a reference for the governor static characteristics test and data processing.

The article points out the lack of the recommended methods on runoff regulation of small hydropower that supplies water primarily in Hydro Energy Design Code for Small Hydro Power ProjectsSL 76-2009. However, the commonly used design procedure still includes some unreasonable places. In order to solve this problem，the article introduces an improved calculation method that avoids or corrects the conventional method’s unreasonable assumed condition, the simplified calculation, etc. The improved method is long series calculating method, and it can be used for all kinds of reservoir regulation performance. The improved method has passed the practical test of a number of projects, also its calculation is reasonable and the result is accurate. Compare with the conventional method, more water supply to firm flow rate can be gained by taking the improved method.

With the advance of power electronic technology, HVDC light transmission based on voltage-source IGBT power converters have been increased rapidly. In order to realize the independent control of the active and reactive power, this paper has built the mathematical model of a HVDC light system in a d-q reference frame. According to the double closed-loop decoupling control scheme, a PI controller design and parameter setting method of the current inner loop and power outer loop is detailed introduced. And a simulation model of a HVDC light system based on the Matlab/Simulink is also built. The result of the simulation successfully verified the effectiveness of the proposed model and controller.

This paper adopted three dimensional RNG k-ε turbulent model and VOF free surface treatment technology to simulate the flow field of a certen hydropower station intake. And analyzed the flow characteristics from hydraulic parameters like flow pattern, velocity , pressure distribution and head loss,ect. The calculation results show that before stop-log gate the water velocity is greater at 10m above the gate top elevation, along with the stop-log gate top elevation increases, water forms multidimensional vortex after the stop-log gate more easily, and the head loss increases correspondly; the change of water level and stop-log gate top elevation has little effect on the range of pressure distribution in channel. The calculation results can provide reference for similar projects.

Abstract：A power generation scheduling model of wind power combined with hydropower systems has been presented. The estimation of distribution algorithm based on Monte Carlo simulation is selected to solve the problem. The feasibility of model is demonstrated by testing multi-reservoir systems with wind power. The adaptive control strategy and hill-climb local search strategy are proposed to improve estimation of distribution algorithm in global search ability. The example analyzes the balance between reliability and economics in combined optimization system. The model provides an effective method to solve scheduling problem in combined system with wind power.

Aiming at runoff properties of Gez River, combining topography and geology condition of the river reach, three sets of diversion mode (mode 1: directly using tailrace of Gez hydropower station; mode 2: building regulating gate and utilizing regional runoff; mode 3: building regulating dam and utilizing regional runoff) were made in condition of regulation storage and the requirement of hydraulic arrangement. Aiming at above three diversion modes, their advantages and disadvantages were comprehensively compared and analyzed through Kinetic energy index, geology condition, construction condition, eco-environmental effect, sediment accumulation and economic evaluation. Mode 2 was recommended, which was building regulating gate on original channel and generate electricity using regional runoff and tailrace of Gez hydropower station.