Upgrading of Geosphere Environmental Informatics for diversity of soil environmental standard

本研究选择大阪地区（秋田县）作为模型场，该地区是日本具有代表性的矿区。我们将小坂河流域从上游到下游划分为多个多边形，并在小坂干流沿线设置了6个监测点，对河水流量进行采样和测量。利用GIS （Geomorphological Information System）分析了该地区的土地利用状况、河水重金属浓度及其与老矿山和PRTR工厂的关系。利用这些分析方法可以发现未被发现的重金属来源，这与不确定老矿的矿山废水未经处理密切相关。

Osaka area (Akita Prefecture) was selected as a model field for this study, where is representative mining are in Japan. Watershed of the Kosaka river was subdivided into polygons for the upstream to downstream, and we have six monitoring points along the Kosaka main stream for sampling and measuring of river water flow.By using GIS (Geomorphological Information System), we analyze land utility of the area, heavy metal concentration in river water and their relationship between old mines and PRTR factory. We could find undiscovered heavy metal sources by those analytical method, which is closely related untreated of mine drainage of uncertain old mines.