Fundamental study on measures of flood control considering groundwater recharge-Attempt utilizing regional characteristics-

点击翻译按钮获取中文摘要

The Hokuriku region of Japan has many wells used as snow melting facilities. This study treats the practical applications of inland flood control using those wells. The method, in which rainwater is injected directly to the wells, is proposed to prevent inland flooding during rainy and typhoon seasons. Field injection tests were conducted in Mitsuke city of Niigata to examine the effects of the direct recharge of rainwater on the groundwater environment. It became clear that the wells provided sufficient capacity of injection. Although groundwater in the well was changed to rainwater by the injection, the groundwater quality gradually returned to its prior state after stopping the injection. However, clogging substances such as iron bacteria and iron oxide flocks were detected in the well about two days after the injection.