Assessment of two loss methods for estimation of surface runoff in Zaafrania urban catchment, North-East of Algeria
| Autor: | Lahbassi Ouerdachi, Yacina Dahdouh |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
Environmental Engineering
surface runoff 0208 environmental biotechnology Geography Planning and Development Drainage basin lcsh:River lake and water-supply engineering (General) 02 engineering and technology North east Development rainfall-runoff modelling Water Science and Technology Hydrology Estimation lcsh:TC401-506 geography HEC-HMS method geography.geographical_feature_category business.industry Agricultural and Biological Sciences (miscellaneous) Green–Ampt method SCS-CN 020801 environmental engineering Landscape architecture Environmental science urban catchment business Surface runoff |
| Zdroj: | Journal of Water and Land Development, Vol 36, Iss 1, Pp 37-43 (2018) |
| ISSN: | 2083-4535 |
| Popis: | Surface runoff is a major problem in urban catchments; its generation is always related to the amount of effective rainfall dropped over the surface, however in urban catchments the process is considerably altered by the emergence of impervious areas. In this study the Soil Consevation Service – curve number (SCS-CN) and the Green–Ampt loss methods were used in rainfall-runoff modelling in the Zaafrania urban catchment which is located in Annaba city in the north east of Algeria. The two loss methods were carried out within Hydrologic Engineering Center – Hydrologic Modelling System (HEC-HMS), the choice of the appropriate method for simulating runoff hydrographs in the study area was made by comparing the simulated hydrographs versus observed data using visual inspection and statistical analysis. The results indicate that SCS-CN loss method fit better in the case of 100 years return period NSE (0.462) than in 10 years NSE (0.346) and the results of calibration of Green–Ampt loss method for the 100 years return period NSE (0.417) provide best fit than the case of 10 years NSE (0.381). Furthermore, the results of both return periods (10 and 100 years) of SCS-CN loss method provide best fit than the results of return periods (10 and 100 years) of Green–Ampt loss method. It could be concluded that SCS-CN method is preferred to the Green–Ampt method for event based rainfall-runoff modelling. |
| Databáze: | OpenAIRE |
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