Risk assessment of watershed erosion at Naesung Stream, South Korea
| Autor: | Un Ji, Man-Ha Hwang, Mark Velleux, Pierre Y. Julien |
|---|---|
| Rok vydání: | 2014 |
| Předmět: |
Hydrology
Geologic Sediments geography Environmental Engineering Watershed geography.geographical_feature_category Databases Factual Drainage basin Storm General Medicine Models Theoretical Management Monitoring Policy and Law Sedimentation Risk Assessment Soil Rivers Calibration Republic of Korea Erosion Environmental science Surface runoff Waste Management and Disposal Sediment transport Time of concentration Environmental Monitoring |
| Zdroj: | Journal of Environmental Management. 136:16-26 |
| ISSN: | 0301-4797 |
| DOI: | 10.1016/j.jenvman.2014.01.033 |
| Popis: | A three-tiered approach was used to assess erosion risks within the Nakdong River Basin in South Korea and included: (1) a screening based on topography and land use; (2) a lumped parameter analysis using RUSLE; and (3) a detailed analysis using TREX, a fully distributed watershed model. These tiers span a range of spatial and temporal scales, with each tier providing increasing detail and resolution. The first two tiers were applied to the entire Nakdong River Basin and the Naesung Stream watershed was identified as having the highest soil erosion risk and potential for sedimentation problems. For the third tier, the TREX watershed model simulated runoff, channel flow, soil erosion, and stream sediment transport in the Naesung Stream watershed at very high resolution. TREX was calibrated for surface flows and sediment transport, and was used to simulate conditions for a large design storm. Highly erosive areas were identified along ridgelines in several headwater areas, with the northeast area of Songriwon having a particularly high erosion potential. Design storm simulations also indicated that sediment deposition of up to 55 cm could occur. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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