發(fā)布時間：2019-05-09 11:48

【摘要】：由于水文情勢中的徑流過程是影響河流生態(tài)系統(tǒng)改變的主要因素,有必要研究龍灘水庫建壩前后徑流過程的變化。依據(jù)建庫前后天峨站1980年~2003年和2007年~2015年兩個系列逐日徑流實測數(shù)據(jù),以IHA指標體系為基礎(chǔ),采用可變范圍(RVA)法通過分析32個水文改變指標,評估了龍灘水庫建設(shè)與運行之后下游水文情勢特征的變化。計算結(jié)果表明:紅水河天峨站水文情勢綜合改變度為70.49%,屬于高度改變。水庫修建后對逐月徑流量、年極端流量及其出現(xiàn)時間、流量頻次和延時、流量改變率和頻度產(chǎn)生了顯著影響。通過對建壩帶來的流域水文情勢改變情況的分析,為流域管理部門制定合理的水庫生態(tài)調(diào)度方案提供決策支持。
[Abstract]:It is necessary to study the change of runoff process in Longtan Reservoir before and after dam construction because the runoff process in hydrological regime is the main factor affecting the change of river ecosystem. Based on the daily runoff data from 1980 to 2003 and from 2007 to 2015 at Tianao Station before and after the establishment of the reservoir, based on the IHA index system, the variable range (RVA) method was used to analyze 32 hydrological change indexes. After the construction and operation of Longtan Reservoir, the characteristics of downstream hydrological regime are evaluated. The results show that the comprehensive change degree of hydrological regime is 70.49%, which belongs to height change. After the construction of the reservoir, the monthly runoff, the annual extreme flow and its occurrence time, the frequency and delay of the flow, the change rate and the frequency of the flow have a significant effect. Based on the analysis of the change of hydrological regime caused by dam construction, the decision-making support is provided for the watershed management department to formulate a reasonable reservoir ecological dispatching scheme.
【作者單位】： 廣西大學土木建筑工程學院;廣西防災(zāi)減災(zāi)與工程安全重點實驗室;廣東省水利電力規(guī)劃勘測設(shè)計研究院;
【基金】：國家自然科學基金資助項目(51669003,51009029) 廣西重點研發(fā)計劃項目(桂科AB16380284) 廣西重點實驗室系統(tǒng)性研究項目(2014ZDX012)
【分類號】：TV697.21

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