In this paper, using Sicilian and Australian rainfall intensity data, a comparison between different estimators (modified Fournier index F, FF index) of the rainfall erosivity factor in the USLE was made. The relationship between the modified Fournier index and the mean annual rainfall, P, was theoretically derived. The K constant, linking the FF index and P, and its cumulative distribution fun...

Soil Erosion Estimation Using Grid-based Computation Soil erosion estimation is an important part of a land consolidation process. Universal soil loss equation (USLE) was presented by Wischmeier and Smith. USLE computation uses several factors, namely R – rainfall factor, K – soil erodability, L – slope length factor, S – slope gradient factor, C – cropping management factor, and P – erosion co...

Changes in land use made to meet the needs of life line with population growth do not balance decreasing availability natural resources. The Tabunio watershed is a that included second priority be handled province South Kalimantan. Amparo Kecil sub-watershed one part watershed, which located upstream area. has large slope, vegetation form forest, rivers fast currents and prone erosion. This stu...

Water erosion can cause irreversible depletions in soil quality and crop productivity. The susceptibility of the to is affected by current historical management practices. Historical practices like ploughing or subsoil loosening may lead degradations soils, which turn increases risk. Six “Wischmeier” plots under conservation agriculture, but with different historic treatments regarding use mana...

ity in rainfall erosivity and associated sediment yield. Rainfall erosivity and sediment yield can be measured Rainfall depth within small semiarid watersheds can have high much more cost effectively than runoff, an important spatial variability, but spatial variability in rainfall erosivity, a more direct determinant of sediment yield, has not been quantified. Using consideration when studying...

A general procedure is presented for calibrating a model for rainfall erosivity based on daily rainfall. The approach is based on probability distributions of wet-day precipitation amount and monthly erosivities which are inferred from published data summaries. The calibrated model was tested by comparisons with erosivities computed from hourly precipitation data. Model results were generally c...

Estimation of soil loss from single storm events is essential for basin planning and nonpoint source pollution control. Rainfall-runoff erosivity factors for single storm events in northern Iraq were derived from the basic theory of soil detachment and transport. The factors derived are a single parameter which includes runoff depth only and a factor which combines runoff depth and peak rate. T...

Este trabajo presenta los resultados de nuestro estudio sobre la cartografía y estimación erosión del agua utilizando dos tipos métodos. El primero es el PAP/RAC 1998 que actúa en marco Plan Acción para Mediterráneo (PAM) PNUMA, segundo modelo empírico WISCHMEIER SMITH 1978 (USLE).En cuenca Oued Amlil (153,7 km²) situada al noroeste Taza (noreste Marruecos) se dan todas las condiciones desencad...

AnnAGNPS (Annualized AGricultural Non-point Source), a continuous simulation and distributed pollution model, is widely applied in evaluating non-point source pollution and watershed management practices. However, the complexity of required input data and modeling procedure keep it from being an efficient modeling tool. An integrated GIS interface was developed to facilitate organizing and prep...

The Donghe basin is one of the typical regions with serious water and soil erosion in Kaixian county of China. In this study the spatial distribution variation of soil erosion in Donghe basin is analyzed based on a comprehensive method that integrates SWAT model with a Geographic Information System and remote sensing technologies and the effects of land use changes on soil erosion is also analy...