Japan Geoscience Union Meeting 2014

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Poster

Symbol A (Atmospheric, Ocean, and Environmental Sciences) » A-HW Hydrology & Water Environment

[A-HW28_30PO1] Water and material transport and cycle in watersheds: from headwater to coastal area

Wed. Apr 30, 2014 6:15 PM - 7:30 PM Poster (3F)

Convener:*Chikita Kazuhisa(Department of Natural History Sciences, Faculty of Science, Hokkaido University), Tomohisa Irino(Faculty of Environmental Earth Science, Hokkaido University), Shin-ichi Onodera Shin-ichi(Graduate School of Integrated and Arts Sciences, Hiroshima University), Shinji Nakaya(Department of Civil Engineering, Faculty of Engineering, Shinshu University), Masahiro Kobayashi(Forestry and Forest Products Research Institute), Mitsuyo Saito(Graduate School of Environmental and Life Science, Okayama University), Seiko Yoshikawa(Narional Institute of Agro-Environmental Sciences), Noboru Okuda(Center for Ecological Research, Kyoto University)

6:15 PM - 7:30 PM

[AHW28-P15] Current status of the groundwater use in an island of the Seto Inland Sea: a case study of Ikuchijima-island

*Tomomasa TANIGUCHI1, Shin-ichi ONODERA2, Hidehiro TAKAHASHI3, Mitsuyo SAITO4, Yuta SHIMIZU5 (1.Faculty of Humanities, Law and Economics, Mie University, 2.Graduate School of Integrated and Arts Sciences, Hiroshima University, 3.NARO Western Region Agricultural Research Center, 4.Graduate School of Environmental and Life Science, Okayama University, 5.NARO Western Region Agricultural Research Center, JSPS PD)

The study is aimed to examine the current status of the groundwater use in an island of the Seto Inland Sea, southern Japan. This area is characterized by high risk of drought with low annual rainfall and limited water resource. We conducted face-to-face surveys in the form of a multiple-choice questionnaire in two areas (districts of Miyabara and Hayashi) with different main resource of agricultural water in Ikuchijima-island, Onomichi-City. Citrus farms such as orange, lemon etc. are widely cultivated in both areas. The rate of households having domestic well is about 74% in Miyabara district, and is about 62% in Hayashi district. The main purposes of groundwater use are watering in garden and car wash in both areas. About 20% of respondents answered that groundwater resource is not enough for the agricultural use in the dry season. It indicates the groundwater is regarded as one of the important water resource in the island. Averaged daily domestic use of groundwater per household are estimated to be 361L/day and 271L/day in Miyabara and Hayashi, respectively.*This research is supported by the Grants-in-Aid for Scientific Research (A) (No. 25241028, Shin-ichi Onodera).