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Journal
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Electronic
Journal of the International Association for Environmental Hydrology
JEH Volume 11 (2003), Paper 7,
July 2003 Posted
July 11, 2003
COMPARISON OF LOCAL INFILTRATION EXCESS, OVERLAND FLOW AND ASSOCIATED EROSION BEHAVIOR WITH RIVER BEHAVIOR AT THE CATCHMENT SCALE Elias Dimitriou National Centre for Marine Research, Institute of Inland Waters, Agia Paraskevi, Greece ABSTRACT Modeling overland flow and erosion behavior is a very important scientific task today to prevent environmental impacts from human activities, as well as physical disasters such as floods and desertification. This project has identified the impacts from selective logging in Malaysia by comparing hydrological parameters, both at a local and a catchment scale. Measurements of rainfall, overland flow, and suspended sediment flux were recorded for a year with a resolution of five minutes. A Data Based Mechanistic (DBM) modeling approach was applied to facilitate physical interpretation of the results, which provided credible conclusions. The significant alteration of the area’s hydrologic regime, due to human interventions, is apparent. The extreme nonlinearity of the rainfall-suspended sediment flux relationship reduced the efficiency of the models, and did not allow reliable forecasting. Nevertheless, useful conclusions have been drawn from the comparison of hydrologic parameters at different scales. The DBM models described the physical processes well and provided satisfactory results. Reference: Dimitriou, E.; Comparison of Local Infiltration Excess, Overland Flow and Associated Erosion Behavior with River Behavior at the Catchment Scale, Journal of Environmental Hydrology, Vol. 11, Paper 7, July 2003. CONTACT: Elias Dimitriou National Centre for Marine Research Institute of Inland Waters 32 Thrakis St. 15341 Agia Paraskevi Greece E-mail: elias@ncmr.gr |
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