Surface Erosion Estimations Using Universal Soil Erosion Equation (USLE) Regarding Terrain Revegetation

Marcel DáŽRJA, Andrei POP, Adela HOBLE, Tudor SÄ‚LÄ‚GEAN

Abstract


Depending on the amount allowable soil losses can be used to establish strategies for choosing cultural structures and their relationship, their share in a crop rotation with very good, good or poor soil protection. Following heavy rains, leaks occur as a rolled canvas spread over the land surface. Following leakage of these processes, with streams of water are entrained soil particles and moved longer distances or smaller. Following this process, after a time, depending on the frequency and duration of heavy rains that generate surface runoff, finally, lead to total washing humus accumulation horizons and finally reach the parent rock or rock foundation. Under the indirect method (Universal Soil Erosion Equation of conditions in Romania) has determined that the surfaces covered with forest, located on a slope of between 5-10% slope and slope length of steepest slope below 100 m, recorded an annual loss of 0.0067 t · ha-1, respectively on a slope with the largest slope length greater than 100 m is estimated annual quantity of 00.0058 t · ha-1. To identify risk areas for soil erosion is necessary to set limit values ​​of tolerance levels and set the type of soil and its characteristics, except that vary from region to region and depending on the type coated surface of the land.


Keywords


soil humidity, rainfall, run-on, runoff, surface erosion.

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