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中文摘要：
以常用HydroSHEDS void-filled DEM、SRTM、ASTER GDEM等五种DEM数据为研究对象,针对不同流域下垫面地貌形态,采用不同的地貌特征分析方法以及将流域真实水系和模拟河网对比分析等方法,研究了多源DEM数据的质量问题。研究发现ASTER GDEM数据主要问题是噪声大,HydroSHEDS void-filled DEM和SRTM数据的主要问题是存在模糊,噪声、模糊均会降低数据的精度和提取的模拟河网的精度,但从整体上来看,三种DEM数据提取的模拟河网的质量相当。
英文摘要：
This paper selected five different sources of DEM data：HydroSHEDS void-filled DEM,SRTM and ASTER GDEM and so on to analyze the quality of different DEM data under different geomorphologic shapes by choosing different geomorphological characteristics analysis methods and comparing the simulated drainage networks with the real drainage networks.The results showed that the main problems of ASTER GDEM DEM data was data noise and of the other two DEM data both had some fuzzy data.These data quality issues would all affect the accuracy of the data and the river network extracted from them.In general,the accuracy of these digital drainage networks extracted from the three DEM data all had high precision.
同期刊论文项目
同项目期刊论文
Impacts of Land‐Use and Climate Changes on Hydrologic Processes in the Qingyi River Watershed, China
Impacts of Land-Use and Climate Changes on Hydrologic Processes in the Qingyi River Watershed, China
Modeling and assessing hydrologic processes for historical and potential land-cover change in the Du
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