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タイトルヨミ
ショウワ58ネン 7ガツ ゴウウ ニヨル マスダ カイタク ノウチ ゾウセイイキ ノ コウウ リュウシュツ トクセイ
日本語以外のタイトル
Rainfall and Runoff Characteristics in Masuda Reclamation Area Caused by Heavy Rainfall, July, 1983
ファイル
言語
日本語
著者
福島 晟
田中 礼次郎
内容記述(抄録等)
The western parts of Sanin District were suffered severe disasters from flood caused by the record heavy rainfall on 20-23 July, 1983.
This paper discussed the rainfall and runoff characteristics caused by the heavy rain fall in the Otonaga River basin of Masuda reclamation land located in the hilly area of Masuda City.
Based on the observed rainfall data in the Otonaga River basin, it was found that the records of total and maximum daily rainfalls were both renewed and the daily rainfall exceeded the expected value of 200 years retern period in Masuda City.
The observed rainfall intensity of short time during 1-12 hours also exceeded the expected value of the planning scale of drainage channel systems. Consquently, it became clear that the severe disasters originated mainly in the unheard heavy rainfall in this district.
Nextly, using the hydrographs of flood water level and discharge on 20-23 July at the dam site of Otonaga River, the parameters of runoff characteristics were evaluated 0.96 in the peak runoff coefficient and 160 in the coefficient of formula for concentration time of flood. While, the concentration time of flood was 25 minutes and the mean effective rainfall intensity during the that time was 99.9 mm/h.
Moreover, the specific peak discharge of flood was 27.8m^3/s/<km>^^^2. And its value was nearly plotted on the enveloping curve for regional flood peaks in Sanin District. Therefore, it was concluded that the magnitude of peak discharge recorded in the experimental basin was the class of the regional maxima of flood peak in Sanin District.
掲載誌名
島根大学農学部研究報告
18
開始ページ
120
終了ページ
131
ISSN
0370940X
発行日
1984-12-20
NCID
AN00108015
出版者
島根大学農学部
出版者別表記
Shimane University, Faculty of Agriculture
資料タイプ
紀要論文
部局
生物資源科学部
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