龙川江流域上游地区河流泥沙输移变化及影响因素

发布时间：2018-06-07 12:35

本文选题：气候变化 + 输沙量　；参考：《水电能源科学》2017年04期

【摘要】：为了解龙川江流域上游地区河流泥沙输移变化特征及影响因素,基于金沙江一级支流龙川江上游地区1970~2012年的逐月输沙量、径流量和降雨量等数据,采用均差累积曲线、Yamamot检验和小波神经网络耦合模型等方法,探讨了该区输沙量变化特征及其影响因素。结果表明,龙川江上游输沙量年内分配极其不均匀,主要集中在5~11月,尤其是7~9月集中了全年输沙量的近70%;40多年来,研究区河流输沙量变化可以分为三个阶段,1970~1984年为减少阶段,1985~2002年为增加阶段,2003~2012年为减少阶段;气候变化是龙川江流域上游年均输沙量变化的主要控制因素,而人类活动的贡献率相对较小,但越来越显著。研究结果为该区水电建设等提供了理论依据。
[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.
【作者单位】：云南师范大学旅游与地理科学学院;
【基金】：云南省教育厅重点项目(2015Z056) 国家自然科学基金项目(41101099,41261044)
【分类号】：TV14

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