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Fundamental study on the making method of a groundwater pollution vulnerability map using GIS

利用GIS绘制地下水污染脆弱性图方法的基础研究

基本信息

批准号：
08555139
负责人：
MORISAWA Shinsuke
金额：
$ 5.89万
依托单位：
KYOTO UNIVERSITY
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (A)
财政年份：
1996
资助国家：
日本
起止时间：
1996 至 1998
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-08555139/
关键词：
GIS vulnerability map numerical map data groundwater pollution induced recharge field study numerical simulation the Katsura river 地下水質データベース揚水影響河川浸透水数置シミュレーション地下水質推定環境影響評価

项目摘要

The system of making a groundwater pollution vulnerability map which showed the possibility of groundwater deterioration caused by a unit volume of groundwater extraction in the Katsura River watershed was developed. First the mechanism of shallow groundwater deterioration near the Katsura River was studied with field investigations and numerical simulations. The results showed that the cause of the deterioration seemed to be the recharge of deteriorated river water induced by the large quantity of groundwater extraction. This meant that the quantity of the recharge from the Katsura River could be compared to the possibility of groundwater deterioration of this area. Therefore, we made the groundwater pollution vulnerability map by simulating the groundwater recharge from the Katsura River using various numerical map data on the open market. For making the map, the analytical region was automatically decided and divided into finite elements, the catchment area was automatically evaluated, and transmissivity and the quantity of groundwater extraction were estimated from the numerical map data. This procedure can be used for the other area in Japan where there is not enough quantity of groundwater data. The results of the application of the procedure to the Katsura River watershed showed that the simulation using only the numerical map data was qualitatively effective and such a vulnerability map as the one created in this study was thought to be useful for deciding a new plant location or environmental impact assessment.

开发了一套制作地下水污染脆弱性图的系统，该图显示了在卡特彼勒河流域抽取单位体积地下水造成地下水恶化的可能性。首先，通过实地调查和数值模拟，研究了Katagawa河附近浅层地下水水质恶化的机理。结果表明，地下水的大量开采，导致水质恶化的河水回灌，可能是导致水质恶化的原因。这意味着，从卡特罗河的补给量可以与该地区地下水恶化的可能性相比较。因此，我们利用公开市场上的各种数值地图数据，通过模拟来自Katagawa河的地下水补给，制作了地下水污染脆弱性地图。在制图过程中，自动确定分析区域并将其划分为有限单元，自动计算汇水面积，并根据数值地图数据估算出地下水的流量和开采量。该方法可用于日本其他地区地下水资料不足的地区。应用该程序的结果表明，仅使用数值地图数据的模拟是定性有效的，这样的脆弱性地图，在这项研究中创建的一个被认为是有用的，用于决定一个新的工厂的位置或环境影响评估。