Remote Sensing for Watershed Hydrology: Issues and Challenges |
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Authors: | Yuanbo Liu Guiping Wu Xiaosong Zhao Xingwang Fan Xin Pan Guojing Gan Yongwei Liu Ruifang Guo Han Zhou Ying Wang Ruonan Wang Yifan Cui |
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Affiliation: | 1.Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing 210008, China;2.School of Earth Science and Engineering, Hohai University, Nanjing 211100, China;3.School of Resources and Environmental Engineering, Wuhan University of Technology, Wuhan 430070;4.Sanjiang University, Nanjing 210012, China |
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Abstract: | With significant development since the beginning of the 21st century, hydrologic remote sensing becomes one of the most active disciplines in earth sciences, offering numerous opportunities and advances for watershed hydrology and other disciplines of geography. This commentary highlights the specialty and restriction of remote sensing for watershed hydrology on three aspects: watershed closure in water budget, watershed-scale effectiveness of hydrologic parameter retrievals, and watershed model inputs for data assimilation. The current challenges include rational watershed-scale validation, uncertainty control in retrievals, and error sources in data assimilation. |
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Keywords: | Quantitative remote sensing Watershed water-balance components Hydrological process Data assimilation |
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