著者

草光 紀子 一恩 英二 中野 光議 上田 哲行

出版者

日本雨水資源化システム学会

雑誌

Journal of Rainwater Catchment Systems (ISSN:13438646)

巻号頁・発行日

vol.23, no.1, pp.27-34, 2017 (Released:2019-08-06)

参考文献数

29

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Aquatic fauna found in 21 man-made biotopes that were established in agricultural and rural development projects in rural areas in Ishikawa Prefecture, Japan, were surveyed. A total of 117 species were captured or observed, including nine species of amphibians, 14 species of fish, 75 species of aquatic insects, ten species of crustaceans, and nine species of mussels and snails. Mostly aquatic insects made up the 38 species of odonates found. In addition, 24 coleopteran species and ten hemipteran species were discovered in the biotopes. The Red Data Book of Japan lists Rana nigromaculata, Cipangopaludina chinensis laeta, and Oryzias latipes latipes as endangered species, and these species were captured in 18, eight, and six out of 21 biotopes, respectively. In addition, two nonindigenous invasive species, Procambarus clarkii and Rana catesbeiana, were captured in 11 and six biotopes, respectively. The numbers of species varied greatly among biotopes, ranging from four to 59, suggesting that the effect of biotope on biodiversity was not uniform.

著者

藤原 正幸

出版者

日本雨水資源化システム学会

雑誌

Journal of Rainwater Catchment Systems (ISSN:13438646)

巻号頁・発行日

vol.15, no.2, 2010

著者

稲垣 仁根 井爪 宏 益田 和範

出版者

日本雨水資源化システム学会

雑誌

雨水資源化システム学会誌 (ISSN:13438646)

巻号頁・発行日

vol.17, no.1, pp.33-42, 2011-07

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As the project for the second period, Aichi Water Supply is working to construct a new water channel system by creating multiple upstream water channels and renovating the check gate. Plans to introduce a demand-driven system in the existing downstream channel using a downstream water stage control gate were hindered by the appearance of hydraulic and structural problems such as rise of the water channel and tunnel flooding. Although attention focused on a supply-driven approach, consideration was given to the possibility of introducing a float-type constant upstream and downstream water stage control gate in which a demand-driven water channel system operates as long some extra capacity exists in the water channel upstream from the gate. This type of gate is distinctive in that downstream water level can be regulated using water stored in the water channel upstream from the gate, and offers the advantage of being able to utilize that water without flooding the existing water channel. The operating mechanism of this gate has been shown to possess adequate practical functionality in both on-site testing and performance results from mathematical-model-based simulations. Unlike an open channel system, this type of gate does not require a major investment and allows for limited demand-driven management of the water supply.