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Forecasting Sediment with Erosion Potential Method by Stress on Land Use Changes at Basin
Ali Haghizadeh Faculty of Engineering, University Putra Malaysia, Serdang, Selangor, Malaysia
Lee Teang shui Professor, Faculty of Engineering, University Putra Malaysia 43400 Serdang, Selangor, Malaysia Ehsan Godarzi Faculty of Engineering, University Putra Malaysia 43400 Serdang, Selangor, Malaysia
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ABSTRACT |
Experimental method for effect of land use change to soil erosion and measurement sediment yield at basin have been developed during the past decades. However, each method has its advantages for a particular application at different scale .soil loss estimates using different techniques commonly vary by an order of EPM (erosion potential method) model, thus to chose a proper method for erosion measurement is essentially important to all erosion studies development. A grid-based distributed model EPM mdel compatible with ArcView Geographic Information Systems (GIS), was applied to the 344.91 km2 Upper sezar River in DEZ basin. Model parameters were derived from a digital elevation model (DEM), land use and soil type map of the basin. These parameters and the observed daily meteorological data (1968-2006) were used (1) to tests the performance of the EPM model to a large tropical basin for determined total sediment yield, (2) to identify the different erosion components. The use of yearly observations instead of monthly observations and the lack of other measurements of the hydrological processes .The deviations between the observed and simulated sediments may also be caused by the lack of a good representation of the meteorological conditions in the study area. The EPM model also provided insight into the main flow processes during the year.
Keywords: EPM model, GIS (geographic information system), erosion rate, land use, sediment yield
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