【摘要】：流量過程線的劃分結果對流域滯時分析、降雨徑流關系確定和坡地匯流計算影響很大。以和睦橋小流域為例,基于該區(qū)域2015~2016年4場降雨資料,運用同位素方法對流域的流量過程線進行劃分,探究降水總量和平均雨強對事件水貢獻比例的影響。結果表明,事件前水占總流量的百分比例很大(67.9%~98.3%),肯定了事件前水的重要性;總降水量和降雨強度與事件前水占總流量的百分比例均呈負相關,這主要與流域所處地理位置的氣候條件和下墊面前期土壤含水量有關;不同雨型主要通過降雨事件過程中的蒸發(fā)作用來影響事件前水的貢獻比例,而相同雨型的降雨事件可能與前期土壤含水量有關。
[Abstract]:The result of the flow process line has great influence on the analysis of time lag, the determination of the relationship between rainfall and runoff and the calculation of runoff concentration on slope land. Based on the data of 4 rainfall events from 2015 to 2016, the flow process line of the watershed is divided by isotope method, and the influence of total precipitation and average rain intensity on the ratio of event water contribution is explored. The results show that the percentage of water in the total discharge before the event is very large (67.9% or 98.3%), which confirms the importance of the water before the event, and the total precipitation and rainfall intensity are negatively correlated with the percentage of water in the total discharge before the event. This is mainly related to the climatic conditions of the geographical location of the basin and the soil moisture content in the pre-cushion period, and different rain patterns mainly affect the contribution ratio of pre-event water through evaporation during rainfall events. The rainfall event of the same rain pattern may be related to the soil moisture content in the earlier period.
【作者單位】： 河海大學水文水資源與水利工程科學國家重點實驗室;河海大學水文水資源學院;
【基金】：國家自然科學基金項目(41371048,51479062,40901015) 國家重點研發(fā)計劃(2016YFC402703)
【分類號】：P333

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