Delineating wetland catchments and modeling hydrologic connectivity using lidar data and aerial imagery

Hydrology and Earth System Sciences
Qiusheng Wu, Charles R Lane

Abstract

In traditional watershed delineation and topographic modeling, surface depressions are generally treated as spurious features and simply removed from a digital elevation model (DEM) to enforce flow continuity of water across the topographic surface to the watershed outlets. In reality, however, many depressions in the DEM are actual wetland landscape features with seasonal to permanent inundation patterning characterized by nested hierarchical structures and dynamic filling-spilling-merging surface-water hydrological processes. Differentiating and appropriately processing such ecohydrologically meaningful features remains a major technical terrain-processing challenge, particularly as highresolution spatial data are increasingly used to support modeling and geographic analysis needs. The objectives of this study were to delineate hierarchical wetland catchments and model their hydrologic connectivity using high-resolution lidar data and aerial imagery. The graph-theory-based contour tree method was used to delineate the hierarchical wetland catchments and characterize their geometric and topological properties. Potential hydrologic connectivity between wetlands and streams were simulated using the least-cost-path algorithm. The...Continue Reading

References

Feb 23, 2013·Proceedings of the National Academy of Sciences of the United States of America·Christopher K Wright, Michael C Wimberly
Feb 10, 2016·Proceedings of the National Academy of Sciences of the United States of America·Matthew J CohenSusan C Walls
Aug 1, 2017·Frontiers in Ecology and the Environment·Heather E GoldenMegan Lang

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Citations

Feb 27, 2020·Integrated Environmental Assessment and Management·Bo MengBin Sun
Apr 24, 2018·Hydrological Processes·Charles Nathan JonesLaurie C Alexander
Mar 3, 2021·Environmental Science and Pollution Research International·Abu Reza Md Towfiqul IslamNguyen Thi Thuy Linh
Apr 5, 2019·Journal of the American Water Resources Association·Qiusheng WuHongxing Liu
May 1, 2019·Journal of the American Water Resources Association·C Nathan JonesCharles R Lane

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