A rational allocation of water resources is a key component of water resources planning and management. Based on water resources system character of water delivery district of the South-to-North Water Diversion Project for Hebei Province, a multi-object, multi-water source and multi-user water resources， a rational allocation model is established. The large-scale system decomposition-coordination technique and goal approximation technology are applied to solve the model. Considering the effects of economy, society and ecological environment of water resources rational allocation schemes, the evaluation index system of water resources allocation schemes are established and the fuzzy matter-element analysis model is applied to evaluate rational allocation schemes. The optimal allocation scheme is obtained and analyzed. This study provides a reference for the sustainable development of water resources.

The flood evacuation plan prepared for the upper basin of Huangpu River aims at improving flood control capacity and reducing flood losses in the region. This paper presents four basic steps to develop a flood evacuation plan, which are basic data collecting and sorting, flood risk analyzing and calculating, flood risk mapping, and evacuation planning. On this basis, the flood evacuation plan in the case of the corresponding combination of Dyke Burst conditions and the flood frequency of the upper basin of Huangpu River are carried out. Based on a preliminary analysis and discussion of its validity and reliability, the weaknesses of flood evacuation maps, lacking precision included, are discussed, and future research priorities are proposed at the end of this paper.

The universal assessment indicator system for water resources risk is established in this paper based on natural disaster risk theory, and it have been predigested by Rough Set theory. Thus we can get target indicator that is appropriate to the situation in the evaluation area and the weight of the indicator has been identified by Entropy weight and Analytic Hierarchical Process synthetic approach. On this basis, risk assessment of water resources has been made by comprehensive evaluation method which is based on Extension theory. Employing the coupling of the methods above, we completed the risk assessment of water resources in Quanzhou. As it turned out, the target indicator of it consists of seven items as follows: water resources per capita, average annual rainfall, population density, irrigation water per Mu, water comsumption per unit GDP, development and utilization level of water resources and live use water quota. The result also tells us that the risks of water resources are in medium risks and relatively high risks.

Abstract: Based on the ideas of Sustainable development of water resources and its System features in Manas River Basin, this paper chooses Manas River Basin as the study object, introduces a multi-objective model of water resources allocation and calculates the distribution in the various level years and planning year with the interactive method based on Euclid distance, and evaluates the results by the objective satisfaction degree and objective comprehensive degree. The results can provide the Manas River basin with decision-making on the water resources allocation to improve the utilization rate of water resources in the Basin.

Agricultural water security is the basis and prerequisite of regional water and food security. Based on virtual water theories, economic security and food security view, a regional agricultural water security evaluation index system is established from the viewpoint of regional water security, which consists of 6 indicators of natural technology, economy and society , which includes agricultural water meeting index, water use efficiency, the proportion of agricultural water consumption, groundwater level decline rate of irrigation areas, food security index and degree of food self-sufficiency. According to the fuzzy-analytic hierarchy process (Fuzzy-AHP) evaluation method, the agricultural water security of Zhengzhou City in the future is evaluated. And the security situation and its trend are obtained and the outstanding issues of Zhengzhou City are pointed out.. The integrated schemes are put forward to improve the regional agricultural water security. By the scenario analysis, an optimal scheme is obtained to improve the agricultural water security of Zhengzhou City in the near future.

To protect the famous springs of jinan and find out the causes of spings, pore water,fissure water,karst water in shallow strata and spring samples are collected,and the chemical characteristiscs of these four kinds of water are analysed.Selecting K++Na+、Ca2+、Mg2+、Cl-、SO42-、HCO3-、NO3-、TDS and PH value of nine indicators as variables,the causes of groundwater chemical characteristics are revealed by factor analysis method and correlation analysis method.It is considered that the chemical characteristics of pore water are mainly affected by the rock mineral composition,rainwater mixing,dissolution and human activities.The chemical characteristics of fissure water are mainly affected by the rock mineral compositon,dissolution and mixing of pore water.The chemical characteristics of karst water are mainly affected by dissolution,mixing of upper water locally and carbonate evolution.Springs ara mainly affected by dissolution.It is showed that there is a relation of pore water with fissure water.There are relations among pore water,fissure water and karst water in local district.The causes of the chemical characteristics are different between karst water and springs.

On the ground of systematically study of the eco-hydrologic characteristics in these water-accepted areas, this article had been took advantages of the eco-hydrologic theory and analytic hierarchy process, and picked up 13 index which have constructed into an index system.These index are mainly from the topography, land use, soil erosion, water resources and economic characteristics.By use of the method of hierarchical cluster analysis water-accepted areas are divided to 5 eco-hydrological districts, and every districts is named. So as to the basic eco-hydrological situation of the east line would be well understood, and it would provide some basis in the future related research..

Based on a field experiment ,the soil moisture diffusion regulation and growing dynamic in previous growth of maize after sowing with water was studied over Minqin Oasis and the Tenggeli desert boundary district. The result shows that the water holding agent may cause the soil moisture to gather at the irrigation zero point and the water moisture diffusion slower in horizontal and vertical proliferation. It provide adequate moisture and nutrients for seed germination and seedling .It has great influence on the amount of water of the surface layer soil and one-meter-depth soils after sowing with water used water-containing agent in different density. The result of protecting water was obvious to use the high amount and mix to grow of water holding agent and it increased the amount of water 1.23mm and 2.25mm that the soil keeps before sowing seeds. The leaf' area index and dry material accumulation quantity was high by using the big density and mix to grow of water holding agent treatment and was low of CK and use low density water holding agent. It can increase the seedling rate, reduce the field evaporation, make maize grow well in the seedling, increase yield and the dry number of anti- amount more than 40 days by using accommodation density water holding agent.

Abstract：Dripper discharge is an important parameter of irrigation system design. The size of dripper discharge will produce different range of humid area and determine the flow of the emitter can determine the humid zone, so as long as determine the relationship between humid zone and root distribution, can determine the dripper discharge. This article based on the pot experiment and set 4 drip discharge treatment (l, 1.5,2,2.5 L / h) and observed four growth stages of summer maize (seedling stage, jointing stage, heading stage, maturing stage) of the accumulation of root dry matter and root distribution. The results show that the large of accumulation of dry matter established on 2L / h, the smaller the drip discharge, the longer the long root, the root distribution is narrow and deep. The larger the dripper discharge, the shorter the long root and the root distribution is wide and shallow. The results of experiment provide a reference for selection of dripper discharge in the process of drip irrigation design.

Allow for the features of small reservoir, water loss of reservoir can be estimated according to known utilizable capacity, and a simplified method to compute real utilizable capacity of small reservoir is proposed. for another, the author proved that utilizable capacity and irrigation area are linear correlation for the same water supply periods, and proposed a interpolation method to compute irrigation area, that is, a accurate result of irrigation area can be obtained according to two trial computations. In addition, a formula for computing irrigation area is derived. Under the condition that water supply periods are known, irrigation area can be computed directly using the formula without computation of runoff regulation. Theoretical analysis and practical application show that the above checking computation methods are feasible and accurate.

To satisfy the need of yield management of Xinjiang drip irrigation under plastic film on cotton, a irrigation decision support system for drip irration cotton is developed.It includes function such as:database management,realtime soil moisture diagnosis,irrigation realtime decision, production management and decision,etc.Use water balance method and fade index method to forcast soil moisture,use Thiessen polygon method to calculate average moisture,use fuzzy synthesis judge method to make realtime irriation decision.In practice, exact forcast result of soil moisture is gained and anticipative effect is gotten.

In order to solved the difficult problem that to find suitable sloping field for sprinkler irrigation experiment, the level ground experimental data are transfered to sloping land. Based on the jet trajectory formula, grid transformation is used in data conversion.The data of single sprinkler water distribution are transformed by this method, and compared with the sloping land experimental data, the radius of throw in up and down direction have the same length, the water distribution curve in radial direction are agreed well with. The data of triangular combination irrigation are also transformed by this method, the results show that choosing proper irrigation lateral angle can improve the water distribution uniformity on sloping land.

With the economic and social development, water quantity and quality of urban life on the request, based on objectively requires the use of water in the control situation, analysis water-saving potential and propose water saving measures. Residents in Beibei District from the surveys on household per capita water consumption for the 2.78m3, water consumption accounts for 0.8% of household income, laundry and bath water account for 81%, and then calculated by saving space saving potential of 33.9%. Proposed to change the bad habits of water, promote the use of water-saving appliances, and strengthen government management and pipeline maintenance, water and other water conservation steps to implement practical water conservation measures.

According to the land-replacement and tabor transfer theory, this peper proposed approach of improving the living conditions of rural residents, constructed a rational economic development structure and increased the income level of villagers, to solve the unfairness problem between urban and rural drinking water by investigation of a rural drinking water safety in typical village.This paper also analysised and argumented the feasibility of land-replacement and tabor transfer theory in solveing the problem of rural drinking water safety. The results showed that the land-replacement and tabor transfer theory play the important role in solveing the drinking water safety.

Based on the characteristics of rural water conservancy in Jiangsu province, an evaluation model for Jiangsu province’s rural water conservancy modernization is established. By means of Analytic Hierarchy Process (AHP), the each level’s indices weight of evaluation model are analyzed, thus, the modernization level of rural water conservancy in 13 provincial cities is evaluated. Based on AHP evaluation, a neural network model of rural water consevancy modernization in Jiangsu Province is designed, which is trained and tested on sample attained by AHP. Results show that AHP and Back Propagation(BP) neural network based evaluation method for rural water conservancy modernization in Jiangsu province is feasible, and the error is controllable. This combined evaluation has certain promotional value in the evaluation for rural water conservancy modernization.

In order to manage the dam effectively and analyze dam risk, it is necessary to implement an integrated assessment of dam-break impact severity degree. In this paper, the index system of dam-break impact severity degree and criteria for evaluation were built, and an assessment model based on attribute theory was established. The study of applying this model in Huaxi reservoir in Guizhou province showed that the dam-break impact severity degree belonged to most severity, which was consistent with the results based on the other methods. Thus the attribute assessment model is feasible for assessing the dam-break impact severity degree. Some regulation measures to reduce Huaxi dam-break impact were put forward finally.

The vertical vortex of falling-sill bottom-flow dissipation directly affects the hydraulic index of the energy dissipation pool. We have studied the hydraulic characteristics of vertical vortex behind the sill of the dissipater with the hydraulic test. And also analyzed the form of transverse vortex and the change of its movement area, and then the preliminary study are made on the velocity changes at the shearing points between the vortex and bottom, the vortex and the sill. Besides, the changes of the vortex region related to the integral pressure of the baffle basin are studied. The results show that the vertical vortex have affects on the hydraulic index of the energy dissipation.

Torrent shock wave is a common form of water phenomenon in spillway chute. The article discusses the formation mechanism of diamond-shaped shock wave. Through the model test the variation of water surface route within the diamond-shaped shock wave is given. And calculation method of wave high, wave angle and wave length is given applying hydraulic theory. If deflection angle of side-wall and width of chute is given, then the number of wave height, wave angle and wave length depends on Fr1. Such as result of experimental verification, if the case are basically consistent with the experimental conditions, the formula can be used in practical engineering calculation when Fr1≥2.9. It has important reference value for optimization of chute sidewall′s height.

Through the analysis of the magnetic field of Halbach array，the formation of unilateral magnetic field and its self-shielding effect is found．Because magnetic field is concentrated in the working air-gap，the problem of tip leakage of the traditional magnetic arrangement is solved and the magnetic intensity in the air-gap is increased，so it increases the transmitted torque．Based on Maxwell equations，the theoretical power formula of the eddy current loss is derived．ANSYS software was used to analyze the eddy current of the insulation shell．The results show that the eddy current is vortex-like distribution and is concentrated on the outer surface of the insulation shell．This verifies the tend-towards skin characteristics of the eddy current．The eddy current loss of the magnetic coupling is smaller than its reverse．The results can provide reference for engineering applications．

By the principle of least squares,It is analysed the algorithm of least squares on fitting of characteristic curves of centrifugal pump, those programming is cumbersome and it is not suitable for engineering applications. Using ployfit function can accurately fits the characteristic curves and compares different fiting times.The result shows that the polynomial equation is more identical than that of parabola. Not only the method is accurate, but also is easy to operate, and it provides engineers and designers with a fast and accurate way,as a result it improve economic returns of pump.

According to the development background of hydropower projects, the pros and cons impacts of large hydropower projects construction and operation on society-economy and eco-environment have been comprehensive analyzed. The most important income brought by large hydropower projects is waterpower. The main adverse impacts are represented by sediment deposition, aquatic ecology interference, terrestrial ecology interference and so on. Comprehensive analysis and consideration on the possible pros and cons impacts of large hydropower project construction and operation is the precondition for large hydropower project planning and design, scientifical completing matching measures,and realizing regional sustainable development and basin sustainable development.

Abstract: The safety of rural hydropower is increasingly a cause for concern. Once the dam burst, The impact on the ecological environment will be a serious. With ecological environmental impact index to measure the influence degree of ecological environment when dam break, Select risk factors of upstream reservoir and exposed condition of downstream environment to establish model of calculating ecological environmental effects index, and divide influence degree of ecological environment through the calculation value of this model for further. Take the Chang-long Hydropower Station in Jiangxi Province as an example, Confirmed the operability and practicality of this method.

This paper introduces the design method of a multimedia communication based on the re-transport agents.,and combing the user expand problem regarding the ends to ends architectural models of multimedia communication system, a new congestion control mechanism is also suggested on the base of re-transport agents technique: first, build the re-transport agents tree using the method of congestion avoidance; then, adjust and control the rate of data streams and the occupation of network bandwidth with respect to the present network bandwidth to avoid the network congestion through balancing some loads and losing some loads, and QoS negotiation in re-transport agents tree. The method solves the control problem of QoS in the re-transport agents tree and meet at most the QoS requirements of multimedia communication.