著者

清水 美代 土屋 十圀 孫 士禹

出版者

前橋工科大学

雑誌

前橋工科大学研究紀要 (ISSN:13438867)

巻号頁・発行日

vol.10, pp.34-40, 2007-03-30

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Many water resources depends on a mountainous district river basin in Japan, especially, snow coverage area play an important role in the water resources, therefore it is necessary to perform development and management of water resources exactly. For that purpose, since it is necessary to grasp a characteristic of runoff correctly, the discharge is calculated using the long-term runoff analysis model of Ando which can conduct analysis from fundamental hydrological data, such as daily rainfall and average daily temperature. The water cycle model has a physical meaning, and can reproduce the changes of a long-term outflow well by comparatively easy calculation. Although this model is already applied even in some mountainous district river basins, there are few research examples in a full-scale snow area. Therefore, it applied to the Sakura river which is a snow area, the conformity of this model was examined in detail, and it aimed at clarifying the water balance in the Sakura river. As a result, when influence of snow and meltingsnow was not taken into consideration, the correlation coefficient of observation runoff and calculation runoff was very low. However, when the influence of snow coverage and melting snow is taken into consideration, high correlation was shown, and an accurate analysis was able to be conducted. Moreover, the water balance in the Sakura River became dear from the result of the runoff analysis for five years from 2001 to 2005.