臺灣博碩士論文加值系統

為減少洪災意外事件之發生, 人們在經濟可能範圍內常建造水庫等其
它防洪水工結構物, 並冀望知曉洪水在上游經過水庫運轉後, 流至下游人
口匯集地區之洪峰流量大小及其可能發生之機率, 以作為防洪應變之必要
措施. 河槽變遷及河川地之沖淤等性質, 主要受大流量即洪水的影響,
故洪水的流量歷程與流量之大小, 關係到河槽穩定性之設計. 因此, 對洪
水而言, 有必要考慮到水庫對洪水調節之影響, 方得以正確估計流域內某
特定位置河川流量之洪峰大小與機率分佈, 俾供河槽斷面設計與河川地利
用之參考. 水庫之放水量與水庫之水位有關, 在缺乏足夠的歷史防洪
操作記錄之情況下, 本文建議一分析方法來探討防洪運轉起始水位對水庫
調洪之影響, 並以曾文水庫之防洪操作為例, 經由研究結果可知水庫溢洪
道最大放水量之發生機率甚微,對於最大可能洪水(PMF),本研究以為高估,
建議作一修正, 以期減少溢洪道不必要之運轉, 使蓄水能作最大之利用.

To reduce the occurrence of disastrous floods. With
permission of economy, People have built hydraulic
constuuctions such as the reservoirs. They look forward to be
aware of the magnitude and probability of downstream flood dis-
charge after the reservoir opreation, in order to be the
necessity measure for the flood control. The evolution of
river channel section and the scouring and deposition of flood
plain are mainly the effects of flood discharge, and the process
and magnitude of flood dischargeaffect the stability design of
river channel.Therefore, as far as flood discharge is concerned,
it's essential to consider the influence of the reservoir
operation to flood augumentation. So the peak flow and
probability distribution of discharge in certain locations over
the river basin would be the reference for design of section
size of river channel and utilization of plain along the river.
The outflow discharge of the reservoir is related with the
reservoir storage.In the condition of lacking historical flood
control records,This study suggestsan analytical method to probe
into the effectiveness of initial operation storageto flood
augumentation of reservoir flood control and takes the flood
control ope-ration of Tsengwen reservoir as an example. It is
concluded that probability of the maximum flood discharge of the
spiiway is quite small and probable maximum flood (pmf) would be
overestimated. May be it can be made a correction to reduce the
unnece- ssary operation of the spillway and to make the best use
of the reservoir storage.