水污染

The inorganic and organic polymolecular flocculants commonly used at present have caused some problems such as inferior performance, secondry pollution and so on. Therefoer, the study of new kind of flocculant is a pressing and meaningful task.

0引言絮凝剂是一类可用来有效凝聚、沉降引起水污染的不易沉降的固体悬浮颗粒和胶体颗粒的物质，已广泛应用于工业废水处理、发酵工业预处理和食品工业中的澄清、脱色等方面[1]。

For landfill of Jinqianpu, if peripheral zone of yard is consisted of mild clay the longest transportation distances of CODcr and NH4+ are 56.5m and 25.75m respectively in the time limit of landfill stabilization;(5)The optimal dilution ratio of groundwater runoff volume and leachate is 7:1 to meet more over Ⅲ groundwater quality standard(GB/T14848-93);(6)To build numerical model. Using CL- as a simulation factor, the expansion with time of pollution plume was simulatively calculated when the concentration of CL- is 5000mg/L and 2000mg/L in Jinqianpu landfill by means of internationally general simulating software FEFLOW.

就金钱堡填埋场而言，若场地周围为试验亚粘土层，则在填埋场稳定化年限内和的最大迁移距离分别为56.5m和25.75m；（5）垃圾渗滤液与地下水混合稀释后地下水能够达到III类水质标准以上的混合比为地下水径流量与垃圾渗滤液入渗量之比为7：1；（6）建立污染质运移的数值模型，以为模拟因子，利用国际上通用的模拟软件FEFLOW模拟计算了金钱堡垃圾填埋场中浓度分别为5000mg/L和2000mg/L时在一系列年份对地下水污染晕的扩展。

The common que stion and its countermeasure in the process of graduate project were emphasized mainly.

因此 ，如果学生在毕业设计阶段能受到水环境质量评价以及水污染治理工程的设计等方面的综合训练，则对毕业后进一步发展将有很大帮助。

In this paper the general thoughts and principles of river water pollution synergetic control are also suggested.

然而 ，水污染控制系统规划和总量控制方法等都存在着不足之处。

Starting with an analysis of the characteristics of the water resource of the Qiantang River and the present situation of its exploitation and utilization, this paper suggests a comprehensive exploitation of the water resource of the river in six respects:(1) the establishment of an administrative system for the comprehensive exploitation of the water resource in the river valley;(2) the establishment of a transfluvial navigation system;(3)the enhancement of the exploitation of tourist resources;(4) the...

本文从分析钱塘江水资源特点及开发利用现状着手，提出了综合开发钱塘江水资源的六个方面即：建立流域水资源综合开发管理体系、建立跨流域航运网络、大力开发旅游资源、河口潮汐能的开发利用、防治水污染和保持水土涵养水源，为进一步综合开发、充分利用钱塘江水资源提供依据。

These porblems are: legislation on city plan is deficient, causing unavoidable water pollution under many circumstances; there is lack of effective control of the two major pollutants:industrial sewage and daily sewage; the construction of relative organs is unable to meet the need of environmental protection; the underground water isnt under complete protection;control on other pollutants is unsufficient;local legislation is banal.

具体表现为环评制度、清洁生产制度等存在弊端，无法真正实现对工业废水的源头控制；对生活污水的立法仅限于末端治理，有关节约用水的立法空白较多；现有的城市污水处理系统由于缺乏法律的保障，从设置到运转状况均不能令人乐观；③城市水污染监管体制亦存在漏洞；④对地下水保护不力；⑤对其他污染源控制漏洞较多；⑥地方立法缺乏特色。

PetroChina JinXi petrochemical company lies in west of liaoning province, tobohai bay. It is a very unwatered region,and a water pollution region.

中国石油锦西石化公司地处辽宁省西部，濒临渤海湾，是一个严重缺水的地区，而且还是水污染比较严重的地区。

This study indicates that the residual contaminants in vadose zone are long-term pollution sources, and that can't be ignored in groundwater remediation.

表明包气带中残余的有机污染物是地下水的长期污染源，在地下水污染治理与控制工作中是不容忽视的。

Vadose zone is the main channel of groundwater recharge and pollution. The nature of the vadose zone directly controls the velocity and extent of groundwater pollution.

包气带是地下水补给和地下水污染的主要通道，包气带的性质直接控制了地下水的污染化速度和程度。

Aimed at resolving the pollution of waterhead area in Shanghai currently, the causes for pollution were analysed separately, and then the measures of protection and security were proposed from the side of management, execute and technology.

该文针对上海市水源地水污染的现状，对污染成因逐一分析，并从管理层面、执行层面以及技术层面提出了几点安全与保护对策。

On the other hand, the more important thing is because the urban housing is a kind of heterogeneity products.

另一方面，更重要的是由于城市住房是一种异质性产品。

Climate histogram is the fall that collects place measure calm value, cent serves as cross axle for a few equal interval, the area that the frequency that the value appears according to place is accumulated and becomes will be determined inside each interval, discharge the graph that rise with post, also be called histogram.

气候直方图是将所收集的降水量测定值，分为几个相等的区间作为横轴，并将各区间内所测定值依所出现的次数累积而成的面积，用柱子排起来的图形，也叫做柱状图。