An Estimation for the Effect of Natural Purification on coal field water"Akamizu (sprung from Chikuho Area)"

作者于1993年4月至1995年3月，用水文地质和地球化学方法对赤泉进行了两年的调查。本文对新旧赤霉素的化学成分进行了比较，并对赤霉素的自然净化进行了估计。旧的数据是20年前获得的，两三年前，Chikuho煤田的所有煤矿都关闭了。因此，在旧的数据中，几乎所有赤泉弹簧的电导率都大于1000 μ m /cm，而在新的数据中，有一半的弹簧的电导率小于1000 μ m /cm。四分之一的泉水在化学性质上似乎是地表水。

Writer has been engaged in surveying "Akamizu" by hydrogeological and geochemical method during two years from April 1993 to March 1995.In this paper, he compares old and new Akamizu in chemical component and estimates for natural purification on Akamizu. Old data were obtained twenty years ago 2 or 3 years after all coal mines were closed in Chikuho coal field.As a result, in old data, almost all Akamizu springs showed more than 1000 muS/cm in electrical conductivity, in new data, a half of springs showed less than 1000 muS/cm. And a quarter of springs appeared to be surface water in chemical properties.