The drought and stalinization of soil coexist in Xinjiang, which is the main reason for restricting development of agriculture in Xinjiang. In this paper ditch and drip irrigation under mulch technology are used to plant seeding-melon in saline land, using 1/5 ratio of soil water extraction of soil salinity changes. The results show that the soil salinity of 0-20cm depth decreased to less than 1% totally on May 21; the soil salinity of 0-60cm depth has been down to 2.5% totally on 22 July; mapping under surfer software shows that during seeding-melon growing period, the root zone is always out of desalination. Salt accumulates to 0-30cm depth of the bare land. With root growing, low-salt area gradually expanded, and melon was growing simultaneously. These research findings have some reference to the regulation of saline land.

Stony-soil mountain areas exist largely in China, studying the characteristics of soil water movement of this area has a great realistic significance to research on mountain zone hydrology of our country. Determination of hydraulic parameters of stony-soil media is an important research subject. In this paper, the trial of vertical one-dimensional unsaturated soil water movement in the stony-soil media has been researched by one-dimensional vertical infiltration test. With gravel size 2-5 cm and under four different gravel contents of the mixture, the measured amount of soil water infiltration characteristics, estimating the model parameters, and then predicting soil water infiltration process by model parameters. The relative error between the predicted infiltration time and the measured time is less than 6%, and it has relative accuracy. This indicates that applicability of the one-dimensional vertical infiltration algebraic model in the unsaturated stony-soil media, and could meet the practical needs.

Abstract: At present, the Xinjiang agriculture water-preservation irrigated area occupies always fills area 46.5%, outdoes the national average level 8.4 percentage points.In the highly effective saving water area, micro fills proportion 65.73%, outdoes the national 56.8 percentage points; The channel guards against infiltrates the area proportion 48.1%, outdoes the national 30.2 percentage points.The saving water irrigation develops quickly, for the extremely arid interior Xinjiang water resources sustainable use, the optimized disposition economical water used structure adjustment goal is playing the vital role.Based on Xinjiang agriculture irrigation system saving water irrigation development scale, system structure, main promoted questions and so on saving water pattern which will pay attention from now on, will use the systems engineering technology method plan research.The result indicated that, micro fills with the low-voltage tube fills is the agricultural highly effective saving water development main body, promotes with at present micro fills and so on the highly effective saving water present situation to tally.Has provided the technical reference for “35” the enlarge farmland saving water development scale.

The hydraulic characteristic experiments for two kinds of domestic pressure-compensated emitters, three kinds of steady flow devices and one in-line cylindrical emitter are tested. The emitter flow exponent in different pressure units and manufacturing variation are analyzed. The results show that pressure-compensating emitters have an optimal pressure range, in which the flow exponent is comparatively small and the water characteristic curve is smooth. The non-compensating emitters have stable flow exponent in all pressure range and water characteristic curve is stable and continuous. The all tested pressure-compensating emitters’ manufacturing variation coefficients change from 0.12 to 0.30. Both non-compensating emitters manufacturing variation coefficients are 0.02. The results show that the emitter manufacturing variation influence largely on the irrigation uniformity. The emitters with small manufacturing variation coefficients should be chosen first in micro-irrigation design.

The changes of soil temperature was studied under different water-level managements in different growth periods according to the field experiment of Zhendao 99.The results show that the difference of surface soil temperature among different water managements is remarkable. The daily maximum soil temperature and the variation of daily soil temperature under water deficit treatment are higher than that other water-level treatment,and the daily average temperature of soil under the condition of flooding is higher than contrast treatment.Influenced by the water level and temperature ,the variation of daily soil temperature and the the daily average soil temperature decrease from the top to 40 cm depth.After water controlling, both the variation of daily temperature and the time of the top temperature appearing change under different watre-level managements.

Abstract: Aiming to influence of soil water and fertilizer on plant mechanics in salinization distribution, With 312-D optimized saturation desing,field experiment are conducted to study influencing factor and regular of temporal and spatial variation of sunflower' s leaf water potential. Besides meteorologic factor,the result shows that the key influencing factors of sunflower' s leaf water potential include soil salt 、soil moisture and rate of fertilizer application.The relationship between leaf water potential and atmosphere water potential is linearity,the relationship between leaf water potential and leaf surface temperature is linearity. the leaf water potential and matric potential has a positive relationship. to some extent, Fertilization can release the compel of water and salt, increase in fertilizer can reduce the leaf water potential.

The purpose is for the problem of limited level on condition of rainfall forecast. The scale of the water level is determined by flood discharge capacity-restraint method. The limited level is computed by fuzzy control mod by combining the rainfall forecast and water level condition. The result shows that fuzzy control mode has proved the storage benefit of reservoir and the risk is not increased.

According to the planning and construction of the reservoir model test and found the regularity of the reservoir. At the same time, through model test of different spread in different flow sediment, the amount of time, analysis of the factors affect flushing water level, flow, for deposition, open hole, sediment particle size, length of deposition. And the water level, flow, deposition, open hole several important factors to influence is analyzed the flushing, provides the basis for the reservoir.

A fouling test system in plate heat exchangers was set up and the main Songhua River water quality parameters such as conductivity, iron, total bacteria, pH and turbidity are closeted with the fouling by using the polynomial matching method. This paper selected these water quality parameters and time as the input variable, took the fouling resistance as the output variable, found a prediction model of cooling water fouling resistance based on BP neural network. Combining the absolute error and relative error analysis, the prediction accuracy is up to 90% and the generalization ability of network is reliable. The results showed that the model is applicable not only to the conditions that water flow, geometrical specifications of plate heat exchangers are constant, but also to the conditions when they change.

With the development of the construction of the water conservancy and water electricity, the durability of hydraulic structures has attracted more attention, especially in the colder regions. This paper detailedry discusses the key water projects at the Xia BanDi in Sin Kiang, design the concrete mix ratio for the native place by a large number of experiments, in order to provide the reference foundation for the similar areas. The results of tins experiment showed that:when the fly ash content ≤30%, the freeze-thaw resistance has been improved, and with the fly ash content increased,the strength of concrete and the amount of air entraining agent has reduced.

In this paper, based on a core-wall rockfill dam, Duncan E-v linear and nonlinear models, Duncan E-B linear and nonlinear models, K-G model and M-C model are applied to analyze the characteristics of the stress and deformation with 2-D static FEM analysis. Through simulating the process of dam construction and water storage and basing on comparative analysis of different constitutive model, the stress and deformation characteristics and differences of the dam and core wall are studied, the applicability of different constitutive model in the numerical simulation of a high rockfill dam are also explored.

In allusion to reinforcement design rarely considered the effect of intermediate principal stress, the true triaxial test is taken to study the effect of intermediate principal stress on the strength of reinforced loess in this paper. The results show that intermediate principal stress has a significant influence to the strength of reinforced loess, and the strength of reinforced loess has a increasing trend in the whole with the increase of coefficient of intermediate principal stress; For a given ratio of the intermediate principal stress, as the value of b is small, the strength of reinforced loess tends to increase as the reinforced layers increased, but as the value of b becomes bigger, it shows a contrary tendency, and analyzed the influence of intermediate principal stress to the strength index. Intermediate principal stress has a great influence on the strength of reinforced loess especially when taking the transversal reinforcement, so the effect of intermediate principal stress can not be disregarded during the reinforcement design.

Abstract: According to the research on compacted loess slacking deformation character in triaxial test, this paper analyzed the slacking deformation characters and reasons of loess in different initial water contest, compact degree, confining press, principal stress difference and the wet head. The results indicated that: the time when the soil samples reach at new stability after slacking increased as the increase of principal stress difference and initial water contest, and decreased as the increase of compact degree confining press and the wet head; these condition also play important roles in axial and volume deformation. Key words: compacted loess; triaxial slaking test; wetting deformation;

According to the character of TBM construction, risk index system is established and risk assessment method based on entropy weight is proposed to find out the key risks. By using this method, subjectivity of AHP is avoided and more reasonable results are achieved. Finally, the application of a water diversion tunnel in Xinjiang is shown. It provides the scientific supports on risk prevention and schedule control of the project.

In this paper, the backwater and creep height of the skew bridge are observed by physical model test , and three-dimensional numerical model of water flume is established to simulate the disturbed flow field of a single cylinder pier, in which a k-ε turbulent model is used to simulate close Reynolds equations and volume of fluid (VOF) method is used to track the free water surface. Based on the calculating results the relationships of the creep height of the coming water and the oblique shock wave of cylinder pier with the Froude numbers have been found to analyze the effect of the disturbed flow caused by the upstream pier on the creep height upon the downstream pier of skew bridge.

On the basis of exploration-design bidding mode, a new bidding mode, the feasibility-design integration bidding mode, was proposed in this paper, and in this mode, project feasibility study and design were bidden at one time in the project feasibility stage. An empirical survey for the scope of the mode was made, and some aspects, such as project types, sources of funds, investment scales, project completion time, etc., were analyzed in detail.

Abstract： Because long-term urban water demand is uncertainty, the delivery capacity of urban water distribution system is required to be flexible to satisfy multiple possible water demand scenarios in the future. In each prediction phase, water demand can be regarded as a stochastic variable. Based on the uncertain demand prediction information, further consideration is how to effectively utilize the predicted demand conclusion to determine the delivery capability. A multi-objective optimization with multiple prediction phases is applied to minimize both the wasted investment due to overestimated delivery capacity and supplementary investment due to underestimated delivery capacity. The flexible design can help decision maker to select a low cost decision based on long-term and various water demands.

During the period of the project construction of large hydroelectric power station, the flood-prevention work has a great influence on the project construction. The owners of Tankeng Hydroelectric Power Station has attached great importance to the flood-prevention work, adopting the way that the owners take overall responsibility and the parties participating in the construction are responsible for their respective parts according to the contract. An effective meteorological information exchange and flood-forecasting system have been established, the standardized and ordered mechanism for flood-prevention work has been implemented, and the essentials that the flood-prevention work directs the pace of the engineering construction and the appearance of the project ensures the safety have been well practiced. Targeted on ‘safeguarding the public as well as the project security’, Tankeng Hydroelectric Power Station has achieved great success in the flood-prevention work during its construction.

The current distribution of the grounding electrode is calculated theoretically in this paper combined with the electric field theory. Combining the operating data with theoretical calculation, the corrosion life of the sharing grounding electrode of Yunnan-Guangdong and Guizhou-Guangdong II DC transmission project is evaluated.