【摘要】：將國內(nèi)外應(yīng)用較廣的數(shù)字濾波法和分布式水文模型SWAT相結(jié)合,在進行基流時間特征分析的基礎(chǔ)上,通過修正基流退水系數(shù)α、模型效率評價、重新運行模型、GIS空間插值和趨勢分析等方法,創(chuàng)新性地實現(xiàn)了基流空間特征的可視化表達(dá)。研究結(jié)果表明:1 2001~2012年灞河流域年均基流指數(shù)(BFI)為0.43,總體呈增加的趨勢。年降水量與年徑流、年基流均呈明顯的正相關(guān)關(guān)系,與年基流指數(shù)呈明顯的負(fù)相關(guān)關(guān)系;2基流年內(nèi)變化較為穩(wěn)定,在時間上存在秋季春季夏季冬季、汛期非汛期的關(guān)系�？菟诘幕髦笖�(shù)高達(dá)0.78,表明基流是枯水期河流的主要補給來源;3灞河流域基流在空間上表現(xiàn)為自東南向西北、自上游向下游逐漸增加的趨勢,這種空間分異規(guī)律是由流域的地勢和河流流向決定的。
[Abstract]:The widely used digital filtering method at home and abroad is combined with the distributed hydrological model SWAT. Based on the analysis of the time characteristics of the base flow, the visual expression of the spatial characteristics of the base flow is innovatively realized by modifying the coefficient 偽 of the base flow, evaluating the efficiency of the model, re-running the model, GIS spatial interpolation and trend analysis. The results show that the average annual base flow index (BFI) of Bahe River Basin from 2001 to 2012 is 0.43, which shows an increasing trend as a whole. The annual precipitation has obvious positive correlation with annual runoff and annual base flow, and has obvious negative correlation with annual base flow index. (2) the variation of base current is stable in the year, and there is a relationship between autumn, spring, summer and winter, flood season and non-flood season. The base flow index in dry season is as high as 0.78, which indicates that the base current is the main recharge source of rivers in dry season. (3) the basic flow in Bahe River Basin increases gradually from southeast to northwest and from upstream to downstream, which is determined by the topography and river flow direction of the basin.
【作者單位】： 西北大學(xué)城市與環(huán)境學(xué)院;西北大學(xué)地表系統(tǒng)與災(zāi)害研究院;陜西省土地工程建設(shè)集團;河北水利電力學(xué)院水利工程系;
【基金】：中國科學(xué)院國際合作局對外合作重點項目(131551KYSB20160002) 國家自然科學(xué)基金項目(41401602) 陜西省自然科學(xué)基礎(chǔ)研究計劃項目(2014JQ2-4021) 陜西省重點科技創(chuàng)新團隊計劃項目(2014KCT-27) 西北大學(xué)研究生自主創(chuàng)新項目(YZZ15011)資助~~
【分類號】：P333

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