摘要
不同DEM数据源具有不同的高程误差,也导致其在提取城市水系和流域范围的时候存在着不一样的差异。为了减少单一DEM误差的影响,可以通过融合多源DEM,减小局部DEM误差,提高DEM精度。结果表明,相比于单一的DEM数据,融合DEM数据提取的模拟水系和流域范围的准确程度更高。坪山河实例应用表明,综合考虑水系和流域范围的精度误差,对2个来源DEM高程进行平均处理效果最优。
There is difference on extraction of urban water system and river basin because different data source of DEM has a different elevation error.In order to reduce the impact of single DEM error,this paper proposes an effective way to improve the DEM accuracy by fusing the multi-source DEM and reducing the local error.The results demonstrate that the fusing DEM shows a greater accuracy in extracting the water system and river basin.Moreover,the application of Pingshan River reveals that it could get the best result by averaging the elevation of two different Source DEM with comprehensive consideration of accuracy errors of water system and river basin.
作者
刘佳嘉
周祖昊
刘琳
卢斌
戴东宸
朱家松
严子奇
LIU Jiajia;ZHOU Zuhao;LIU Lin;LU Bin;DAI Dongchen;ZHU Jiasong;YAN Ziqi(State Key Laboratory of Simulation and Regulation of Water Cycle in River Basin,China Institute of Water Resources and Hydropower Research(IWHR),Beijing 100038,China;Engineering and Technology Research Center for Water Resources and Hydroecology,Ministry of Water Resources,Beijing 100038,China;China Construction Water&Environment Co.,Ltd.,Beijing 100037,China;School of Civil Engineering,Shenzhen University,Shenzhen 518000,China)
出处
《人民珠江》
2020年第2期104-108,共5页
Pearl River
基金
国家重点研发计划资助项目(2016YFC0402405)
中建水务环保有限公司科技研发计划资助项目(CSCEC-PSH-2017-03)
龙岗河坪山河两河流域综合治理方案编制项目(SZCG2016121595B)
河南省城镇水系治理与水生态修复关键技术研究与示范项目(HNST-KY-01)
江西水利科技项目(KT201411、KT201501、KT201508)
中建股份科技研发项目(CSCE-2019-Z-11)
关键词
水系提取
流域提取
多源DEM融合
坪山河
drainage extraction
watershed extraction
multi-source DEM fusion
Pingshan River
