水质污染

Based on the analysis of the existing pollution status of urban river s, the remediation technology including physical, chemical and bioecological technology were introduced, with analysis of their advantage, disadvantage and applicability.

在分析城市河道水体污染现状和污染源的基础上，介绍了物理、化学、生物生态等城市河道水质恢复技术，分析了不同技术的优缺点及适用性，并预测了城市河道水体恢复技术的发展趋势。

Based on the analysis of the existing pollution status of urban rivers, the remediation technology including physical, chemical and bioecological technology were introduced, with analysis of their advantage, disadvantage and applicability.

在分析城市河道水体污染现状和污染源的基础上，介绍了物理、化学、生物生态等城市河道水质恢复技术，分析了不同技术的优缺点及适用性，并预测了城市河道水体恢复技术的发展趋势。

The Paper summarized the characteristics of water systems in the brooky region of Jiang-Zhe Plain in China, and discussed the related water pollution and water shortage issues resulting from water quality deterioration.

摘 要：本文概述了我国江浙平原河网地区的水系特征与伴随社会经济快速发展而来的水环境污染与水质型缺水问题。

It was emphasized that GB3838-2002 not only need to pay attention to the full treatment of wastewater and rainwater but also the proper disposal of treated wastewater which meet the national discharge standard GB18918-2002 but still contain significant amount of pollutants if compare with the national surface water quality standard GB3838-2002. To the brooky region of Jiang-Zhe Plain, the discharged pollutant loads still significantly exceed the environmental capacity of the receiving waters even if all treated wastewater meet the first grade B limits of GB18918-2002, and the water pollution problem still cannot be really eliminated.

通过比较分析，我国现行的城镇污水处理厂污染物排放标准GB18918-2002和地面水水质标准GB3838-2002，明确提出，相对于这一区域的地面水环境质量而言，不但雨污水必须得到充分有效的净化处理，达标排放的污水中也仍然含有总量不容忽视的污染物质；对于江浙平原河网地区，即使全部城市污水都达到GB18918-2002中一级B的要求，排放的污染物负荷仍然会明显超过受纳水体的环境容量，水污染问题仍然难以真正消除；达标处理水的处置与利用问题值得特别的关注与探讨。

Wanfenghu reservoir has been polluted seriously, and waters are in a severe eutrophication condition. Whether physico-chemical indexes or biological indexes appraisal, it proved that the water quality of Wanfenghu is between IV-V. Wanfenghu contains high TN and TP which are 5 to 6 times of the national standard content, and the quantities construction of phytoplankton communities is deeply disequilibrium, the Cyanophyta and Charophyta occupying overwhelming

万峰湖水库已经受到了严重污染，水体处于严重富营养化状态，其水体中的溶解氧的三季变化范围在2.92-5.3mg·L之间、化学耗氧量三季平均值为34.77 mg·L~(-1)、总氮三季平均值为2.5 mg·L~(-1)、总磷的三季平均值为0.35 mg·L~(-1)、叶绿素a含量的三季平均值为23.64 mg·m~(-3)，以上各指标表明万峰湖水库水体处于Ⅳ-Ⅴ类水质；无论从浮游植物的群落数量上还是浮游植物种类组成上看，蓝藻和绿藻都占绝对优势，而其它各种藻类极少，是典型的蓝-绿藻型水

There was no significant difference on the density and biomass of phytoplankton between spring and summer.1.1.3 The dominant species of phytoplankton was as the following:Gomphonema sp.,Synedra sp.,Navicula sp.,Nitzsschia closterium,Cymbella sp.,Closterium sp..1.1.4 Comprehensive index demonstrated that the water quality was polluted slightly in Maqu section.1.1.5 A negative correlation was present between the density and biomass for phytoplankton and altitude in spring and summer.

1.1.4综合几种指数的综合评价，该流域水质呈轻度污染。1.1.5春夏两季，浮游植物密度、生物量均与海拔呈负相关性，即随着海拔的上升，浮游植物密度、生物量呈下降趋势。1.2浮游动物群落结构1.2.1浮游动物共2门18种。

Furthermore, according to the summing-up of water treatment for the Chaohu Lake, the measures, such as pre-oxidation to water source-polymeric aluminum-ferric and ferrous surplus chlorine coagulation- HCA concretional aid-cl.

文章对巢湖微污染水质的特点及形成原因进行了深入的研究；对氨氮、藻类、p H值、异味等四个特征指标的变化规律做了详细论述；对以巢湖为水源的水处理技术进行了总结，提出了源水预氧化—聚合铝铁、亚铁氯化联合混凝— HCA 助凝—除臭剂、活性碳联用去除异味—微絮凝的高效率水处理模式，不仅在合肥供水集团有限公司取得了非常良好的应用效果，也可为其它以内陆湖泊为水源的制水厂所借鉴。

After that ,water quality simulation is operated with BOD5 as the only contaminative factor.

在RMA2模拟结果的基础上、以BOD5作为污染因子，在RMA4中进行水质的模拟。

Solved the contaminative problem of large kitchen reservoir, went up for water quality from fountainhead " safe ".

解决了大伙房水库的污染问题，从源头为水质上了&保险&。

To conter the situation of increasingly declining groundwater level and environmental pollution, the water quality assessment and analysis of sea water invasion district was studied.

针对秦皇岛市地下水位下降，环境污染日益严重的现实，开展了以海水入侵区为主的地下水质综合评价与分析。

However, as the name（read－only memory）implies, CD disks cannot be written onorchanged in any way.

然而，正如其名字所指出的那样，CD盘不能写，也不能用任何方式改变其内容。

Galvanizes steel pallet is mainly export which suits standard packing of European Union, the North America. galvanizes steel pallet is suitable to heavy rack. Pallet surface can design plate type, corrugated and the gap form, satisfies the different requirements.

镀锌钢托盘多用于出口，替代木托盘，免薰蒸，符合欧盟、北美各国对出口货物包装材料的法令要求；喷涂钢托盘适用于重载上货架之用，托盘表面根据需要制作成平板状、波纹状及间隔形式，满足不同的使用要求。