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Please use this identifier to cite or link to this item: http://ntour.ntou.edu.tw:8080/ir/handle/987654321/24334

Title: 集水區降雨逕流歷程之連續性模擬
Continuous Simulations for Watershed Rainfall-runoff Processes
Authors: 李光敦;洪夢秋;林怡廷;張進鑫
Contributors: NTOU:Department of Harbor and River Engineering
國立臺灣海洋大學:河海工程學系
Keywords: 連續性逕流模擬;地形指數模式;運動波-地貌瞬時單位歷線模式;地理資訊系統;日流量模式;小時流量模式
Continuous runoff simulations;TOPMODEL;Kinematic-wave based geomorphic IUH model;Geographic information system;Daily flow model;Storm event model
Date: 2006-06-01
Issue Date: 2011-10-20T08:11:28Z
Publisher: 農業工程學報
Abstract: 摘要:傳統水文模式均祇分別針對長期距流量或是短期距流量進行模擬,因此長期距模式無法模擬颱洪暴雨期間流量急遽上升之現象,而短期距模式則無法模擬地下水流從土壤含水層緩慢釋出之情形。故本研究建立連續型逕流模式,結合地形指數模式與運動波-地貌瞬時單位歷線模式,以進行日流量模擬與小時流量模擬。研究中並由累積雨量制訂出模式串接標準,銜接日流量模式與小時流量模式,以進行集水區降雨逕流歷程之連續性模擬。因此在無降雨或低降雨強度情況下,可藉由日流量模式模擬集水區地下水流的退水過程;而於高強度集中降雨之颱洪時期,則可藉由小時流量模式掌握洪峰流量及尖峰到達時刻。因此本研究所建立之連續型逕流模擬方式,可適切反應出長期距與短期距之集水區逕流現象。
本研究以橫溪集水區為例,利用數值高程模式求得地形指數模式及運動波-地貌瞬時單位歷線模式中所需之地文因子,以進行日流量及颱洪流量之模擬。研究中並配合地理資訊系統ArcView GIS應用軟體,建立集水區地文與水文資訊查詢系統,將模式操作轉換為視窗化介面,使用者僅須以滑鼠點選集水區河川網路上任一位置點,即可進行該指定位置點以上地文因子之查詢,以及集水區之長、短期距的降雨逕流演算。
abstract:Conventional hydrologic models are usually only applied to long-term or short-term runoff simulations. Consequently, the long-term runoff model cannot adequately simulate the rapid rising discharge during typhoons, and the short-term runoff model cannot well simulate the runoff slow flowing out of the subsurface stratum. The TOPMODEL and the kinematic-wave based geomorphic IUH model were developed for daily flow and storm runoff simulations, respectively. A criterion was developed with cumulated rainfall to link these two models to form a continuous runoff simulations. The daily runoff model can well simulate the recession process of groundwater during no/low rainfall. While applying hourly simulation model, especially for the predictions of storm peak flow and time to peak, a better performance can be found in hourly-flow simulations. Therefore, the runoff situations of daily flow and storm runoff can be both reflected adequately with the continuous runoff simulations.
The Heng-Chi watershed is adopted for applying the TOPMODEL and the KW-GIUH model for long/short terms runoff simulations. The geomorphic parameters of the watershed were calculated by using a digital elevation model. The continuous runoff simulations were embedded into an ArcView GIS platform to form a geomorphic- hydrologic inquiry system for practical applications. The operation of runoff modeling was then transferred onto a convenient Windows based interface. When using the inquiry system, users can interactively select a location for a subwatershed outlet by simply clicking on the desired point within the watershed stream network, and then the geomorphic factors and runoff calculations can be performed.
Relation: 52(2), pp.12-22
URI: http://ntour.ntou.edu.tw/handle/987654321/24334
Appears in Collections:[河海工程學系] 期刊論文

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