长江科学院院报2018，Vol.35Issue(6)：117-121,134,6.DOI:10.11988/ckyyb.20170480
拉萨河流域河宽与地形结构因子相互关系分析
Correlation Between River Flow Width and Topographic Structure Factors in Lhasa River Drainage Basin
摘要
Abstract
The average river flow width of ten main river segments in Lhasa River drainage basin were obtained with the help of remote sensing data of Google Earth after gauging the river width of 451 reaches.On this premise,the correlation between river flow width and five topographic factors,inclusive of river's longitudinal slope,river's tor-tuosity,river's concavity,upstream catchment area and catchment average slope,were plotted with four different functions:linear function,exponential function,logarithmic function,and power function.Results implied that,a-mong the five factors,upstream catchment area is of the largest correlation with river flow width with the coefficient of certainty amounting to 0.81 when fitted by linear function;longitudinal slope of river also has a remarkable im-pact on river flow width,with the coefficient of certainty reaching 0.76 fitted by power function and exponential function.Researching the correlation between river flow width and topographic structure factors in Lhasa River drainage basin would be of crucial significance for us to understanding the river geomorphology in Qinghai-Tibet Plateau and improving our ability of estimating flow rate and total flow amount in ungauged basins.关键词
拉萨河流域/河流水面宽度/地形结构因子/相关性分析/GoogleEarthKey words
Lhasa River basin/river flow width/topographic structure factors/correlation analysis/Google Earth分类
天文与地球科学引用本文复制引用
蒋成伟,刘金涛,林璐,许珊珊,姬海娟..拉萨河流域河宽与地形结构因子相互关系分析[J].长江科学院院报,2018,35(6):117-121,134,6.基金项目
国家自然科学基金项目(91647108) （91647108）
西藏自治区科技项目(2015XZ01432) （2015XZ01432）
