Improved Methods of Parameterization for Estimating the Magnitude and Frequency of Peak Discharges in Rural Ungaged Streams
| Autor: | Kathleen L. Hancock, Randel L. Dymond, C. C. Hodges, Walter McDonald |
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| Rok vydání: | 2016 |
| Předmět: |
Hydrology
geography Watershed geography.geographical_feature_category Flood myth 0208 environmental biotechnology Magnitude (mathematics) 02 engineering and technology STREAMS Structural basin 020801 environmental engineering Ridge Geological survey Environmental Chemistry Environmental science Time of concentration General Environmental Science Water Science and Technology Civil and Structural Engineering |
| Zdroj: | Journal of Hydrologic Engineering. 21 |
| ISSN: | 1943-5584 1084-0699 |
| DOI: | 10.1061/(asce)he.1943-5584.0001248 |
| Popis: | For the past several decades, the United States Geological Survey (USGS) and others have been tasked with development of regional predictor equations to determine flood peaks in unregulated and ungaged rural locations. This study tests several new watershed parameters not commonly used in past studies that have been extracted from available geomorphologic and climatic data using both manual and programmatic methods with the goal of improving the predictive power of the regional equations. Parameters include a derived basin slope corresponding to surface flow direction, discrete travel time for each location in a watershed to the outlet, and development of a watershed subarea correlated with the location of the maximum length isochrone line within each watershed. A case study is presented that tests these parameters in the Valley and Ridge physiographic region of Virginia. Results indicate that the proposed parameters tend to reduce standard model error in predictor equations ranging between 0.97 a... |
| Databáze: | OpenAIRE |
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