Japan Geoscience Union Meeting 2016

Presentation information


Symbol A (Atmospheric and Hydrospheric Sciences) » A-HW Hydrology & Water Environment

[A-HW19] Water Environment and Geology in Urban Areas

Wed. May 25, 2016 5:15 PM - 6:30 PM Poster Hall (International Exhibition Hall HALL6)

Convener:*Takeshi Hayashi(Faculty of Education and Human Studies, Akita University), Hiroaki SUZUKI(Strategic Technology Development Dept. Research & Development Center, Nippon Koei Co., Ltd.), Kei Nishida(Interdisciplinary Centre for River Basin Environment, Interdisciplinary Graduate School, University of Yamanashi), Motoyuki Asada(Shimizu Corporation), Satoshi Takizawa(Department of Urban Engineering, Graduate School of Engineering, the University of Tokyo), Masaya Yasuhara(Rissho Univ.)

5:15 PM - 6:30 PM

[AHW19-P04] Studies on the groundwater environment in Choshi area (1)

*Takuma Inaba1, Satoko Tezuka1 (1.Chiba Institute of science)

Keywords:ground water, nitrate nitrogen, water examination

Groundwater contamination of nitrate nitrogen becomes a serious problem in the area which is active in agriculture and stockbreeding. Choshi area also suffers from the contamination problem because that area is also one of active areas of agriculture in Chiba prefecture. In order to grasp the situation of the nitrate nitrogen pollution on groundwater in Choshi area, the current research investigated the water qualities from 5 spots of the water wells and from 4 spots of spring in Choshi area from June 2014 to December 2015. Nitrate nitrogen concentration of 3 spots of spring water, which are extracted from the underside of a farmland, exceeded 10 mg/L-1of the groundwater quality standard value (the maximum was 30 mg/L-1). On the other hand, in the well water from a spot near the TONE River, which is located far from a farmland, the nitrate nitrogen concentration was less than 4 mg/L-1. This result suggested a possibility that some spring water was affected by nitrate nitrogen in leaching water from a farmland.