Estimated groundwater recharge including water pipesleakage in Kumagaya City

摘要

The drying up of seepage in Kumagaya City wascaused by the increase of impermeable area with urbanization.The project of rain fall infiltration facilities has been planned forimprovement of a hydrological cycle in Kumagaya City. WithGIS and remote sensing, the most suitable arrangement for therainfall infiltration inlets was examined. Distribution maps forinfiltration, evapotranspiration and groundwater recharge at eachtown in Kumagaya City was designed from the land coverclassification map with hydrological analysis. In thesedistribution maps, influence of the leak from drinking water andsewage networks was counted to the hydrological cycle.