Now the study of the agricultural non - point source pollution is mainly to integrate gis with environmental model . building spatial database is the basement of using gis to study non - point source pollution 目前对农业面源污染的研究主要是将gis作为非常有用的工具结合到环境模型中，而建立空间数据库是利用gis进行面源污染研究的基础。
The results of this dissertation include : ( l ) this study has designed and built an agricultural non - point source pollution spatial database of the three - gorge reservoir area in chongqing based on geodatabase and case tools 在论文进行过程中取得了以下一系列成果： ( 1 )基于geodatabase数据模型，利用case工具设计并建立了三峡库区农业面源污染空间数据库。
Each module includes several submodules . the major functions of anpspis include querying and indexing information and maps , providing the pollution situation and dynamic change of anpsp , and putting forward to control measures 系统主要实现：用于发布相关农业面源污染的资料、信息、地图及提供查询检索服务；提供农业面源污染的现状与分布情况；建立农业面源污染的决策咨询系统，并提出相应的控制对策和解决方案。
Based on investigating numerous references in literature both at home and abroad , collection of statistical data and field survey , this paper conducts a primary study on pollution control of agricultural non - point source by means of riparian buffer in shanghai for the first time 本研究选取了上海松江泗泾镇古楼村为示范区，从2002年4月到2003年12月，在上海首次进行了农业面源污染控制的滨岸缓冲体系的初步研究。
However , so far most of research work in this field has focused on the formation , mechanism , modeling and control measure of anpsp . an online human - computer interaction system needs to be urgently developed to realize visualized issuance , management and analysis information of anpsp 但目前研究大多侧重于农业面源污染的成因、机理、模型和控制对策等，而缺乏一个良好的交互式的用户界面来发布、管理和分析农业面源污染，使其可视化等。
This study has designed and built non - point source pollution spatial database of the three - gorge reservoir area in chongqing based on geodatabase and case tools . the study has also workout the corresponding metadata standard and built non - point source pollution metadata . at last . this study assessed the non - point source critical area applying environmental model 本文基于geodatabase数据模型应用case工具设计、建立了重庆市三峡库区农业面源污染空间数据库，编制了相应的元数据标准并构建了重庆市三峡库区农业面源污染元数据，最后就三峡库区的农业面源污染应用环境模型进行了危险性评价。
Hang - jia - hu water - net plain is the primary grain production base of zhejiang province . with a high population and intensive land utilization , agricultural non - point source pollution is extremely serious in this region . animal wastes , household cleaning products , farmland runoff and leakage mainly contribute to the anpsp 杭嘉湖水网平原地区是浙江省主要的商品粮基地，土地利用强度大，人口稠密，农业面源污染严重，其中畜禽粪尿、生活污染、农田径流和渗漏是该地区三大主要的农业面源污染源。
This article first elaborates ecological agriculture is necessary in karsts mountainous area of three - gorge area , analyzes the questions of environment of agriculture , such as serious soil erosion and the many low - yielding fields , the obvious contradiction between human and land , agriculture and water pollution , frequent droughts and floods , the serious vegetation destruction and ecology function reduce , then proposes the water - preservation , the economical forest , the pasture improvement , the ecology sightseeing agriculture , the garden and the small basin government that six big ecological agriculture development models and countermeasures 摘要本文首先阐述了三峡库区岩溶山区发展生态农业的必要性，分析了农业生态环境存在的水土流失严重、中低产田面积大，人地矛盾突出，农业面源污染、水污染大，旱涝灾害频繁，植被严重破坏、森林生态功能低下等问题，进而提出了节水型、经济林型、草场改良为主畜牧业型、生态观光农业型、庭院型、小流域治理型六大生态农业发展模式及发展生态农业的对策。
Though non - point pollution in crop production is very serious in china , it hasn ' t been attached much importance and resolved well . the effects of non - point pollution on the sustainable development of agriculture and the formative causes of non - point pollution are reviewed in this paper . to promote the environmental protection of waters and the sustainable development of agriculfure , the non - point pollution control in agriculture is discussed from the aspects of cunceptions , policies and technologies 就农业面源污染对农业可持续发展的影响,以及造成面源污染的原因进行了分析,从观念上、政策上、技术上对农业面源污染控制做了一些探讨,以促进农村水环境保护和农业的可持续发展。
Building non - point source pollution spatial database of the three - gorge reservoir area can not only know about the background , status and rule of non - point source pollution and assessing non - point source critical area and calculating pollution load but also provide the scientific dependent for bringing forward quantity control goal and establishing control stratagem of non - point source pollution of the three - gorge reservoir area 建立三峡库区农业面源污染空间数据库不仅可以查清三峡库区农业面源污染的背景状况、现状、规律和三峡水库水体污染现状及其容量，进行危险性评价，确定三峡库区水体的污染负荷，而且可以为提出三峡库区面源污染物总量控制目标并制定三峡库区农业面污染控制战略提供科学依据。
