Estimation of groundwater discharge to the sea using a distributed recharge model

M. Katsuki, J. Yasumoto, A. Tsutsumi, Yoshinari Hiroshiro, K. Jinno

研究成果: 著書/レポートタイプへの貢献会議での発言

2 引用 (Scopus)

抜粋

Groundwater discharge to sea areas affects environmental conditions along coasts. Enclosed bays may experience eutrophication caused by nutrient input from land areas through groundwater discharge since groundwater is often contaminated by large amounts of nutrients as compared with river water. Therefore, it is necessary to estimate the groundwater discharge into seas quantitatively in order to understand nutrient pathways. A distributed groundwater recharge model was developed in order to estimate total groundwater discharge flow into the Ariake Bay, in Kyushu, Japan. The Komoda catchment within the Kikuchi River basin in Kumamoto prefecture was studied as a representative area for the Ariake Bay. The model partitions rainfall into direct runoff, evapotranspiration, and groundwater recharge. Parameters are set based on land use. Groundwater discharge is calculated using a water balance approach. The results show that groundwater discharge into the Ariake Bay from Kukuchi River basin is on average 123 mm year-1. The groundwater discharge accounts for about 8% of total water discharge and 9% of river discharge. The results can be used to better estimate annual transport of nutrients in the groundwater to the sea and thus also to better manage eutrophication problems.

元の言語英語
ホスト出版物のタイトルFrom Headwaters to the Ocean: Hydrological Changes and Watershed Management - Proc. of the International Conference on Hydrological Changes and Management from Headwaters to the Ocean, HYDROCHAN 2008
ページ625-630
ページ数6
出版物ステータス出版済み - 2009
イベントInternational Conference on Hydrological Changes and Management from Headwaters to the Ocean, HYDROCHANGE 2008 - Kyoto, 日本
継続期間: 10 1 200810 3 2008

その他

その他International Conference on Hydrological Changes and Management from Headwaters to the Ocean, HYDROCHANGE 2008
日本
Kyoto
期間10/1/0810/3/08

    フィンガープリント

All Science Journal Classification (ASJC) codes

  • Geochemistry and Petrology
  • Ocean Engineering
  • Water Science and Technology

これを引用

Katsuki, M., Yasumoto, J., Tsutsumi, A., Hiroshiro, Y., & Jinno, K. (2009). Estimation of groundwater discharge to the sea using a distributed recharge model. : From Headwaters to the Ocean: Hydrological Changes and Watershed Management - Proc. of the International Conference on Hydrological Changes and Management from Headwaters to the Ocean, HYDROCHAN 2008 (pp. 625-630)