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Proceedings Paper

Assessing low-relief coastal estuaries watershed boundary and its surface water flow based-on lidar-derived digital elevation models: a case study of Jiangsu
Author(s): Siqi Liu; Xiaoxiang Zhang; Meng Xu; Yan Xie; Xianrong Ding; Changkuan Zhang
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Paper Abstract

Conventional hydrologic analyses of digital elevation models (DEMs) perform well in areas of high topographic relief, where surface water flow is typically unidirectional, convergent, spatially static, and directed toward a single discharge point at the edge of a catchment. Such analyses do not perform well on landscapes with low topographic relief such as estuaries areas. where surface water flow is influenced by subtle topographic depressions and sea-land interaction, which may be bidirectional, divergent, and spatially dynamic in response to hydrologic forcing such as tides or variation in river discharge. We developed a framework for hydrologic analysis of low-relief landscapes using a high-resolution (0.2m) DEM derived from light detection and ranging (LIDAR) data collected over a Jiangsu Radiate Sand Ridges, China. Our approach assessed the pattern and characteristics of estuaries watershed and its hydrologic response drainage, where drainage boundaries were defined by subtle topographic divides across the Salt-marsh.

Paper Details

Date Published: 24 October 2011
PDF: 7 pages
Proc. SPIE 8286, International Symposium on Lidar and Radar Mapping 2011: Technologies and Applications, 828627 (24 October 2011); doi: 10.1117/12.913040
Show Author Affiliations
Siqi Liu, Hohai Univ. (China)
Xiaoxiang Zhang, Hohai Univ. (China)
Meng Xu, Hohai Univ. (China)
Yan Xie, Hohai Univ. (China)
Xianrong Ding, Hohai Univ. (China)
Changkuan Zhang, Hohai Univ. (China)

Published in SPIE Proceedings Vol. 8286:
International Symposium on Lidar and Radar Mapping 2011: Technologies and Applications
Jonathan Li, Editor(s)

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