發(fā)布時(shí)間：2018-06-07 12:35

  本文選題：氣候變化 + 輸沙量��； 參考：《水電能源科學(xué)》2017年04期

【摘要】：為了解龍川江流域上游地區(qū)河流泥沙輸移變化特征及影響因素,基于金沙江一級(jí)支流龍川江上游地區(qū)1970~2012年的逐月輸沙量、徑流量和降雨量等數(shù)據(jù),采用均差累積曲線、Yamamot檢驗(yàn)和小波神經(jīng)網(wǎng)絡(luò)耦合模型等方法,探討了該區(qū)輸沙量變化特征及其影響因素。結(jié)果表明,龍川江上游輸沙量年內(nèi)分配極其不均勻,主要集中在5~11月,尤其是7~9月集中了全年輸沙量的近70%;40多年來(lái),研究區(qū)河流輸沙量變化可以分為三個(gè)階段,1970~1984年為減少階段,1985~2002年為增加階段,2003~2012年為減少階段;氣候變化是龍川江流域上游年均輸沙量變化的主要控制因素,而人類活動(dòng)的貢獻(xiàn)率相對(duì)較小,但越來(lái)越顯著。研究結(jié)果為該區(qū)水電建設(shè)等提供了理論依據(jù)。
[Abstract]:In order to solve the change characteristics and influencing factors of the sediment transport in the upper reaches of the Longchuan River Basin, based on the monthly sediment discharge, runoff and rainfall in the upper reaches of the Longchuan River in the upper reaches of the Longchuan River in the upper reaches of the Longchuan River, the sediment transport volume in this area is discussed by means of the homodyne cumulative curve, Yamamot test and the wavelet neural network coupling model. The change characteristics and its influencing factors show that the distribution of sediment transport in the upper reaches of the Longchuan river is extremely uneven during the year of 5~11, especially in the month of 7~9, focusing on the annual sediment transport volume nearly 70%. In the 40 years, the river sediment transport in the study area can be divided into three stages, the 1970~ 1984 is a decrease stage, the 1985~2002 year is an increasing stage, 2003~201 The 2 year is the reduction stage; climate change is the main control factor of the annual average sediment transport in the upper reaches of the Longchuan River Basin, while the contribution rate of human activities is relatively small, but it is becoming more and more significant. The research results provide a theoretical basis for the hydropower construction in this area.
【作者單位】： 云南師范大學(xué)旅游與地理科學(xué)學(xué)院;
【基金】：云南省教育廳重點(diǎn)項(xiàng)目(2015Z056) 國(guó)家自然科學(xué)基金項(xiàng)目(41101099,41261044)
【分類號(hào)】：TV14

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本文編號(hào)：1991194