气候变化领域集成服务门户(CCPortal): Estimation of River Discharge Solely from Remote-Sensing Derived Data: An Initial Study Over the Yangtze River

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DOI	10.3390/rs10091385
	Estimation of River Discharge Solely from Remote-Sensing Derived Data: An Initial Study Over the Yangtze River
	Sichangi, Arthur W.; Wang, Lei; Hu, Zhidan
通讯作者	Wang, L (通讯作者)
发表日期	2018
EISSN	2072-4292
卷号	10 期号:9
英文摘要	A novel approach has been developed to estimating river discharge solely using satellite-derived parameters. The temporal river width observations from Moderate Resolution Imaging Spectroradiometer (MODIS), made at two stream segments a distance apart, are plotted to identify the time lag. The river velocity estimate is then computed using the time lag and distance between the width measurement locations, producing a resultant velocity of 0.96 m/s. The estimated velocity is comparable to that computed from in situ gauge-observed data. An empirical relationship is then utilized to estimate river depth. In addition, the channel condition values published in tables are used to estimate the roughness coefficient. The channel slope is derived from the digital elevation model averaged over a river section approximately 516 km long. Finally, the temporal depth changes is captured by adjusting the estimated depth to the Envisat satellite altimetry-derived water level changes, and river width changes from Landsat ETM+. The newly developed procedure was applied to two river sites for validation. In both cases, the river discharges were estimated with reasonable accuracy (with Nash-Sutcliffe values >0.50). The performance evaluation of discharge estimation using satellite-derived parameters was also analyzed. Since the methodology for estimating discharge is solely dependent on global satellite datasets, it represents a promising technique for use on rivers worldwide.
关键词	STATIONS HYDRAULIC GEOMETRY SATELLITE-OBSERVATIONS UNGAUGED BASINS RATING CURVES ALTIMETRY DATA MODEL CALIBRATION IMAGERY WIDTH VARIABILITY
英文关键词	altimetry; discharge; remote sensing
语种	英语
WOS研究方向	Environmental Sciences & Ecology ; Geology ; Remote Sensing ; Imaging Science & Photographic Technology
WOS类目	Environmental Sciences ; Geosciences, Multidisciplinary ; Remote Sensing ; Imaging Science & Photographic Technology
WOS记录号	WOS:000449993800065
来源期刊	REMOTE SENSING
来源机构	中国科学院青藏高原研究所
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/259278
推荐引用方式 GB/T 7714	Sichangi, Arthur W.,Wang, Lei,Hu, Zhidan. Estimation of River Discharge Solely from Remote-Sensing Derived Data: An Initial Study Over the Yangtze River[J]. 中国科学院青藏高原研究所,2018,10(9).
APA	Sichangi, Arthur W.,Wang, Lei,&Hu, Zhidan.(2018).Estimation of River Discharge Solely from Remote-Sensing Derived Data: An Initial Study Over the Yangtze River.REMOTE SENSING,10(9).
MLA	Sichangi, Arthur W.,et al."Estimation of River Discharge Solely from Remote-Sensing Derived Data: An Initial Study Over the Yangtze River".REMOTE SENSING 10.9(2018).