但油井在压裂过程中产生的压裂返排液已成为当前油田水体污染源之一。
However, it produces the fracturing liquid in fracturing, which has become one of the current oil field water pollution sources.
染料属生物难降解有机物，染料和印染废水已成为当前最重要的水体污染源之一。
Dyes and their effluent have become one of the main sources of water pollution, and are difficulty to be degraded by organism.
随着点源污染的有效治理，农业面源污染将成为三峡库区水体的最主要污染源。
With strengthening control of point source pollution, agricultural non-point source pollution will be the main pollution source to the Three-Gorge Reservoir area.
在点源污染逐步得到有效控制的今天，面源，这一对地表水体水质有严重影响的污染源在发达国家已经引起了极大的关注。
The nonpoint source pollution, which has played an important role on surface water pollution has been given much attention because of the effective controlling of the point source pollution.
目前小清河流域水体已经受到严重污染，污染源主要为城市工业生产和生活污水，因此城市污水治理是水污染控制的关键。
The pollutants mainly come from the urban industrial production and livings of residents. Therefore, the key to water pollution control is the urban sewerage control.
本文阐述了邛海水体污染及其生态环境破坏的状况，剖析了污染源及其危害。
This article discusses the water pollution and the existing damage of ecological system of Lake Qionghai. Then, it analyzes the reason of the water pollution and its danger.
基于污染物当量计算方法，探讨了1996年- 2007年三峡水库建设期间污染物来源、各污染源及污染物当量逐年变化趋势，初步分析了库区水体水环境质量总体变化趋势。
Based on the pollutant equivalent method, the trends of pollution source and pollutant load in 1996 ~ 2007 are studied and the trend of water environment quality in Three Gorges Reservoir is analyzed.
水体环境污染源按其发生类型分为点源、非点源。
Sources of water pollution can be classified broadly into two categories: point sources and nonpoint sources.
因此农业面源污染已被视为水体富营养化的主要污染源。
So the agricultural non-point source pollution has been considered as the main pollution source of eutrophication.
污染源对湖水水质有重要的影响，在切断了外源污染后，水质有所改善，但水体污染依然严重。
Heavy rains will weaken pollution of the water as the lake has no clean water resource. After cut off the sewage of the lake, water quality of the lake was improved.
污染源对湖水水质有重要的影响，在切断了外源污染后，水质有所改善，但水体污染依然严重。
Heavy rains will weaken pollution of the water as the lake has no clean water resource. After cut off the sewage of the lake, water quality of the lake was improved.
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