Basin Regionalization for the Purpose of Water Resource Development in a Limited Data Situation: Case of Blue Nile River Basin, Ethiopia
| Autor: | Abebe S. Gebregiorgis, Seleshi Bekele Awulachew, Semu Ayalew Moges |
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| Rok vydání: | 2013 |
| Předmět: |
Hydrology
geography geography.geographical_feature_category Drainage basin Statistical parameter Structural basin Water resources Moment (mathematics) Hydrology (agriculture) Log-normal distribution Generalized extreme value distribution Environmental Chemistry Geology General Environmental Science Water Science and Technology Civil and Structural Engineering |
| Zdroj: | Journal of Hydrologic Engineering. 18:1349-1359 |
| ISSN: | 1943-5584 1084-0699 |
| Popis: | It is a familiar exercise in hydrology to characterize river basins into hydrologically homogeneous regions by using parameters suited to explain typical hydrological variables such as extreme and annual flows. This paper discusses regionalization of the Blue Nile River Basin (BNRB) by using statistical techniques and describes the selection of best-fit distribution models to estimate the flood frequency of the basin; such undertakings have not been made before. The BNRB is delineated into five homogeneous regions based on statistical parameters of station data. Approximately 14 different distributions are analyzed. The generalized logistic model is the best fit for Regions I and IV. Log-Pearson Type III distribution is appropriate for Region II. Lognormal and generalized extreme value distributions are selected for Regions III and V, respectively. For all distributions, probability weighted moment parameter estimation method is most efficient, but for log-Pearson Type III, ordinary moments are ch... |
| Databáze: | OpenAIRE |
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