Effect of Topographic Data Accuracy on Water Storage Environmental Service and Associated Hydrological Attributes in South Florida
| Autor: | Sanjay Shukla, Alphonce C. Guzha |
|---|---|
| Rok vydání: | 2012 |
| Předmět: |
Hydrology
geography geography.geographical_feature_category 010504 meteorology & atmospheric sciences Water storage 0207 environmental engineering Elevation Terrain Wetland 02 engineering and technology 01 natural sciences Agricultural and Biological Sciences (miscellaneous) 6. Clean water Lidar Hydrology (agriculture) Environmental science 020701 environmental engineering Digital elevation model Surface water 0105 earth and related environmental sciences Water Science and Technology Civil and Structural Engineering |
| Zdroj: | Journal of Irrigation and Drainage Engineering. 138:651-661 |
| ISSN: | 1943-4774 0733-9437 |
| Popis: | The effects of digital elevation model (DEM) accuracy on terrain attributes and water storage were evaluated by comparing a standard 10-m U.S. Geological Survey DEM and a 10-m DEM derived from Light Detection and Ranging (LIDAR) data, on a ranchland that participated in a water storage environmental services program in South Florida. Elevation differences between the two DEMs ranged from -0.73 m to 1.6 m with a low (31%) correlation. Frequency analysis showed that 64% of the grids in the study area had elevation differences of 0.8 m or greater. Spatial distribution of wetlands and ditches were better represented by the LIDAR than the USGS DEM. Surface water storage in the study area and an isolated wetland was 49% and 21% more, respectively, for the USGS DEM than LIDAR DEM in wet seasons. In dry seasons, the LIDAR DEM resulted in 28% higher storage than the USGS DEM. Annually, the USGS DEM resulted in an average 44% more storage than LIDAR DEM. For a major rainstorm in 2008, the USGS showed 92% i... |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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