石門水庫集水區降雨量時間分布特性之研究

Study on Its Characteristics of the Rainfall Temporal Distribution in Shihmen Reservoir Watershed

林親義(Chin-I Lin) ； 陳信雄(Hsin-Hsiung Chen)

《中華水土保持學報》 23卷2期 (1992/11) Pp. 73-79

https://doi.org/10.29417/JCSWC.199211_23(2).0006

摘要

降雨歷線為一降雨量時間分布之歷程線，它可用某間隔時間來記錄；本文嘗試利用此種特性，自降雨開始將延時分成七個某間隔時間，然後可得每場雨以某間隔時間來表示之降雨量。本文利用D_(tm)=^tΣ_(i=1) R_4／t。R_m式來判別一場雨以某間隔時間平均降雨量在時間分布之均匀度，式中，D_(tm)為降雨歷線中某間隔時間之平均降雨量時間分布均匀係數，R_i為降雨歷線中某間隔時間之任一個降雨量（mm），R_m，為該降雨歷線中某間隔時間之最大降雨量（mm），t為降雨歷線之延時以某間隔時間所分成之數量；本文即利用此一數學式來分析石門水庫集水區各雨量站自1959〜1989年間所觀測之24小時降雨資料，其平均降雨量在時間分布之特性。

關鍵字

降雨歷線 ； 平均降雨量時間分布均匀係數 ； 降雨延時 ； 某間隔時間 ； 石門水庫集水區

並列摘要

Hyetograph is a time distriubtion of rainfall, and it can be recorded by a certain time interval. This paper tries to use its charaeteristics to divide duration into t's segments at a certain time interval from the time of rainfall beginning. Then, we can obtain total rainfall amounts at a certain time interval for each event. That is, the formula of D_(tm)=^tΣ_(i=1)^t Ri/t˙Rm can distinguish uniform degree from rainfall temporal distribution in a hyetograph, where, D_(tm) is uniform coefficient of the mean rainfall temporal distribution at a certain time interval in a hyetograph, Ri is anyone rainfall at a certain time interval in a hyetograph(mm), Rm is the maximum rainfall at a certain time interval in the hyetograph, t is the number of a certain time interval in a hyetograph(mm). This paper should be used the formula to analysis their characteristics of the mean rainfall temporal distribution of 24 hourly rainfall data for each rainfall station in Shihmen Reservoir Watershed from 1959 to 1989.

並列關鍵字

hyetograph ； uniform coefficient of the mean rainfall temporal distribution ； duration ； a certain time interval ； Shihmen Reservoir Watershed