In view of current severe water pollution problems, this paper researches the pollution control decision of sudden water pollution incidents （SWPI） using game theory to provide theoretical and decision-making support for SWPI emergency management. Signal game model between manager and enterprise of SWPI was established based on the classical game theory for conditions with asymmetric inibrmation, type space and signal space of the signal sender and action space of the signal receiver were assumed, and based on which perfect Bayesian equilibriums were solved, and the equilibrium solutions were analyzed for different parameter values. Evolutionary game model of enterprise cluster based on bounded rationality was set up, replicated dynamic equation of model was solved and evolutionarily stable strategy was proposed for different parameter values, and evolutionarily trend of the model was analyzed. The results show that, in pollution control decision making of SWPI, it is conducive for enterprises to adopt pollution control decisions through methods such as publicizing the information and the credits of the enterprises, increasing rewards and penalties on whether the enterprises had taken pollution control measures, using modern advanced information technologies to reduce costs of pollution control and administrative inspections, and so on.

Analytic hierarchy process(AHP) and entropy method were used to calculate combination weight vectors for different evaluation indexes, relevancy of different flood disaster sequences were acquired by means of computing relational coefficients of flood disaster sequences and referenced sequence, flood disaster ranks of different flood disaster sequences were obtained. Application on flood disaster evaluation of China during 1998~2009 showed that the comprehensive evaluation system included more comprehensive and objective flood disaster information, the results were correspond to the actual flood situation. The results indicated that comprehensive evaluation system was conciseness and reliability, which had general applicability in flood disaster evaluation and other areas.

以建三江分局1992~2008年的月降水量序列资料为例,采用小波理论对其进行离散小波变换,揭示月降水量序列在不同时间尺度下的时频特征和周期变化规律,为建三江分局合理制定灌溉制度和发展水稻灌溉面积提供参考依据。研究结果表明:不同的时间尺度分辨率下,建三江分局月降水量序列主要存在6个月、12个月的周期交替变化规律。

混凝土和砌石建筑物基础上的扬压力,是指建筑物处于尾水位以下部分所受的浮力和在上下游水位差作用下,水从基底向下游渗透产生的向上的渗透压力的合力。向上的扬压力减少了坝体的有效重量,降低了闸坝的抗滑能力。在混凝土和砌石建筑物的设计中,扬压力是作为建筑物的主要作用力之一进行稳定计算。以重力坝为例,根据计算,为平衡扬压力需增大的坝体体积为1/3～1/4。建筑物投入运用后,扬压力的大小是否与设计相符,对于建筑物的安全稳定关系十分重要。为此,必须进行扬压力观测,以掌握扬压力的分布和变化,判断建筑物的稳定安全程度,指导水库的运行和管理。

侧槽溢洪道和非常泄洪设施都属于泄水建筑物中的一种型式。通过对侧槽溢洪道和非常泄洪设施特点的分析,得出不管是哪一种泄水建筑物都有其不同的优缺点,在实际应用中要慎重对待。

水闸是除害兴利的水利基础设施,它在防洪、排涝、挡潮、灌溉、供水、环保等方面发挥重要作用。因此,对水闸结构的维修方法分析,为有关部门提供一种科学合理的维修措施就显得更加必要。

山区地形起伏较大,地质结构十分复杂,气候差异悬殊,各方面条件都十分恶劣。其河道坡降陡,洪水位高,洪枯变幅大,冲刷力强,水土流失严重。而山区的大部分城镇、村庄、良田又恰恰集中分布在江河溪沟两岸,洪灾损失逐年增加,河道治理的难度也越来越大。

在水利工程施工过程中,影响其质量的主要因素有"人、材料、机械、方法、环境"等五方面。一个水利工程项目从开工到竣工投入运行的施工过程中,任何环节上出现问题,都会影响工程的质量,甚至埋下质量事故隐患。因此,阐述了提高水利工程施工质量的措施及几点看法,使水利工程施工质量控制真正做到纵向全过程、横向全系统、意识全方向、时间全控制的质量管理要求,综合运用多种督查手段措施,确保结构安全。

Pouring asphalt concrete has some excellent properties such as waterproof,flexible and strong material with good durability,good bonding degree. Pouring asphalt concrete has been widely applied in highway bridges,roller compacted concrete dam and a serious seepage dam. The paper derived the shorttube formula of pouring asphalt outflow and obtained formula of major technical indicators η of the asphalt based on viscous fluid mechanics theory. Though test and analysis,the authors got the influence rule of two factors of outlet diameter of different measuring device and maximum aggregate size on fluidity. The paper can provide reference for aggregate gradation choice of pouring asphalt concrete construction.

1 聚丙烯纤维混凝土的防水性能及机理 混凝土专用聚丙烯纤维的物理性能如下:密实0.91 g/cm3;抗拉强度276 MPa;极限拉伸15%;无毒;耐酸碱性极高;熔点165℃;燃点593℃;导电、导热性极低.聚丙烯纤维混凝土的防水属于刚性本体防水,通过改善混凝土的抗裂和抗渗两个途径来提高防水性能.其防水机理建立在对混凝土的固结、收缩的微观研究基础上.

The concept of system engineering is applied to statistically analyze the concrete cracks of the main channel of the Mid-route of South-to-North Water Transfer Project.On the basis of this,the producing mechanism of the cracking is discussed herein and the causation of the cracking is analyzed as well.The result shows that the causations of the cracking can be divided into freezing and inflation,temperature difference,uneven water content and some other causations;for which some treatment measures are put forward for different cracks,such as placing cement based capillary crystalline water-proof material on the concrete surface,placing cement-based flexible water-proof material on the concrete surface,slotting and filling of the cracks or replacing the concrete after dismantling the cracking concrete etc.

South-to-North water diversion is the biggest water diversion project in the world,the anti-seepage function of the channel is directly related to the project's quality.This article based on the composite geomembrane's anti-seepage mechanism,unified its practical application in the Midroute of SNWD.Illustrated the composite geomembrane's various performance index,the specification choice and the construction technical process,finally we give out the composite geomembrane's application prospect in the channel seepage control water diversion project.

It's of great innovation for enterprises to participate in the farmland development and arrangement under the circumstances of the shortage of farmland resources. This paper analyzes the theoretical basis of enterprises' behavior based on game theory, establishes a cooperative game model and static games of complete information, such as dominant strategy equilibrium between enterprises, iterated dominance equilibrium between enterprises and farmers, according to the relations among the main game subjects, i.e. local government, enterprises and farmers, and analyzes an instance in Lupotan, Shaanxi, based on which strategies for the enterprises are proposed.