【作者】 龚家国； 贾仰文； 周祖昊； 王英； 彭辉； 刘佳嘉；

【Author】 Gong Jiaguo;Jia Yangwen;Zhou Zuhao;Wang Ying;Peng Hui;Department of Water Resources,China Institute of Water Resources and Hydropower Research;State Key Laboratory of Earth Surface Processes and Resource Ecology,Beijing Normal University;

【机构】 中国水利水电科学研究院水资源研究所； 北京师范大学地表过程与资源生态国家重点实验室；

【摘要】 流域数字特征坡度是分布式水文模型的重要参数,随着DEM分辨率的降低对流域坡度信息的描绘能力迅速下降,使得目前的研究中存在着利用高分辨率DEM数据模型计算量剧增,而利用低分辨率DEM数据时计算单元坡度信息严重失真的问题。以NASA发布的30m分辨率DEM数据为基础,以不同尺度流域(南小河沟流域,36.8km~2;泾河流域,4.5万km~2)为研究对象,对不同分辨率DEM数据条件下WEP-L模型基本计算单元坡度变化进行分析,并给出了基于低分辨率DEM提取的流域基本计算单元坡度向"真实"地形坡度值转换的方法,为相关研究提供有益借鉴和参考。更多还原

【Abstract】 Slope is an important characteristic for distrihuted hydrology model.Because the information of Watersheds slope decreased with DEM resolution reduction,model computational complexity explosion hy high resolution DEM,and the information of calculation unit slope may suffer serious distortion hy low resolution DEM in the current research.By Different scale watersheds(Nanxiaohegou watershed,36.8 km~2;Jinhe hasin,45000 km~2) as the research ohject different resolutions,the transformation of hasic calculation unit slope changing in WEP-L model with different resolution DEM was studied at the hase of 30 m resolution DEM published hy NASA..The slope information of hasic calculation unit extracted hy low resolution DEM was converted to true slope in this research,and which can offer related researchers helpful reference.更多还原