In contrast with point source pollution, non-point pollution is difficult to control and prevent because of its randomicity, intermittence, hysteresis and complexity.
与点源污染相比，非点源污染具有随机性、间歇性、滞后性、复杂性等特点，不易控制和治理。
Soil nutrients loss is the main way of non point pollution from farmland.
土壤养分流失是农田非点源污染的主要形式。
Agricultural non-point pollution is the main course of pollution in water source areas.
农业面源污染是目前导致水源地污染的主要原因。
Urban surface runoff is the second large non-point pollution source next to agriculture.
城市地表径流是仅次于农业面污染源的第二大面污染源。
The pollutants are mainly from point pollution source of upper stream of Zhuozhang river.
污染源主要来自于河段上游点源污染。
The domestic sewage discharge is the important source of non-point pollution in rural area.
农村生活污水是农村面源污染的重要来源。
The urban non-point pollution has become main pollution resource of urban water bodies of Shanghai.
城市面源污染已成为上海城区河道的主要污染源。
In the research of non point pollution, how to calculate soil erosion modulus is a very important step.
在非点源污染研究过程中，土壤流失量的计算是一个重要环节。
Moreover, the pollution mainly comes from the industrial wastewater, living sewage and agricultural non-point pollution sources.
污染主要来自工业废水、生活污水、和农业面源。
Lake pollution and eutrophication is a severe environmental problem in China, and non-point pollution is one of the main reasons.
湖泊污染和富营养化在中国是一个严重的问题，而农田面源污染是湖泊污染的主要原因之一。
The status and cause of non-point pollution of agriculture in Zigui county of Three Gorges Reservoir Area was analysed in this paper.
简要分析了三峡库区秭归县农业面源的现状及主要原因。
This paper reviews the development of research of agricultural non-point pollution source model, and points out the future research direction.
本文概述了国内外的农业非点源污染模型研究的历史和现状，并指出了农业非点源污染模型的研究方向。
Agricultural non-point pollution is formed by 4 processes of rainfall runoff, soil erosion, surface solution stripping and soil solution seepage.
农业非点源污染主要由降雨径流、土壤侵蚀、地表溶质溶出和土壤溶质渗漏4个过程形成。
The above findings provide the basis for the planning and design for the non-point pollution control facilities including stormwater storage tank and so on.
研究成果为雨水存储池等城市面源污染控制设施的规划设计提供了依据。
The non-point pollution in urban area is serious and tends to be worse. Understanding about its characteristics and regularities is a basis for effective control.
北京城区面源污染严重并有加重趋势，掌握其污染的特征和规律是实施有效控制的前提。
The results show that during storm period, non - point pollution concentration and momentary toss are co - occurence with the peak value of runoff, their relations are very closely.
研究结果表明：暴雨期内，非点源污染物浓度及瞬时流失量与径流峰值几乎同步出现，它们之间存在着非常密切的关系。
The study provides a practical tool for analysis and management of groundwater nitrate pollution in North China Plain and serves as a supplement of processed-based non-point pollution.
该研究可为华北平原农区地下水质管理提供分析工具与决策依据，是对非点源污染机理模型的有益补充。
Investigations of pollution load of 4 surface runoffs have been conducted, and compared with total non-point pollution load in Shanghai suburbs on the basis of pollution sources assessment.
该文对上海市郊的4种地表径流进行了调查，并在污染源评价的基础上与市郊非点源污染总量进行了比较。
As the main reason for the worse water quality, agricultural non-point pollution, which also causes soil productivity to degenerate directly, is tightly related with the hydrological process.
农业非点源污染是水系或水体水质恶化的最主要原因，同时也是土地生产力退化的直接动因，农业非点源污染又往往与流域水文过程具有不可分割的关系。
The pollutants load investigation in Yunlong reservoir basin shows that the non-point pollution source is the main pollution source. The TN is 91.8%, TP is 98.4% in total water inflow volume.
云龙水库径流区污染物负荷的调查结果显示，云龙水库水污染特征以面源污染为主，入库水量TN占91.8%，TP占98.4%。
In this paper, we proposed a diffusion equation for simulating the problem of pollution, and discussed its application to point pollution, especially while instantaneous point pollution happened.
给出了一个适合于模拟污染问题的扩散方程，讨论了它在点污染，尤其是在瞬时点污染发生时的应用。
After analyzing the water pollution in agriculture, the authors point out that irrational sewage irrigation, fertilization and pesticide application were the main origins for non-point pollution.
分析了农业中水污染的情况，指出不合理污灌、施肥、施药是引发面源污染的重要污染源。
In narrating the base of idea and characteristic of non-point pollution, the existing condition of model research of non-point pollution in agricultural environment at home and abroad is discussed.
在阐述非点源污染的概念、特点的基础上，对国内外农业环境非点源污染模型研究现状进行了综述。
In narrating the base of idea and characteristic of non-point pollution, the existing condition of model research of non-point pollution in agricultural environment at home and abroad is discussed.
在阐述非点源污染的概念、特点的基础上，对国内外农业环境非点源污染模型研究现状进行了综述。
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