著者

松本 大毅 広城 吉成 堤 敦 神野 健二 新井田 浩

出版者

Japan Society of Civil Engineers

雑誌

水工学論文集 (ISSN:09167374)

巻号頁・発行日

vol.49, pp.127-132, 2005-02-01 (Released:2011-06-27)

参考文献数

11

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Sayanokami spring water exists in the new campus of Kyushu University, which is located on the western part of Fukuoka City. This spring water is one of the important water resources for agriculture around the new campus area. The construction of the new campus started last June, 2000. In this study, to understand the hydrological properties of the Sayanokami circumference, 222Rn and tritium were used as tracers, respectively. Consequently, it was found out that the residence time of Sayanokami spring water is 10-20 years. Moreover, the residence time and the catchment area of Sayanokami spring water were estimated using groundwater flow model. As a result, the residence time of Sayanokami spring water was evaluated to be about 25 years at most and the catchment area was specified. It is concluded that the accuracy of estimation of residence time and catchment area of the spring water can be improved by analysis of radioactive isotopes and groundwater flow model.

著者

福岡 捷二 渡辺 明英 新井田 浩 佐藤 健二

出版者

Japan Society of Civil Engineers

雑誌

土木学会論文集 (ISSN:02897806)

巻号頁・発行日

vol.1994, no.503, pp.59-68, 1994-11-21 (Released:2010-08-24)

参考文献数

12

被引用文献数

11 7

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洪水流や航行する船の造る波の河岸侵食力に対し, 河岸に生育しているオギやヨシがどの程度の河岸侵食軽減機能を有するかを現地観測によって調べている. オギやヨシの生育環境, これらの植生が河岸侵食を軽減する機構を明らかにした上で, オギやヨシを河岸保護に活用する場合, 保護機能が発揮される限界流速を理論的に算定し, これが工学上有効であることを現地観測結果によって, 明らかにしている.