DefinePK

Abstract

This research aims to the modeling of the effect by paddy straw fibers on the cover of land surface as a slope erosion controller. This study is testing in the laboratory by using USLE (Universal Soil Loss Equation) model as a comparison to determine the amount of the reduction of the erosion rate that occurs, both on the land without the covering or covering. Research conducted with 3 variations in the intensity of rain that is 50 mm/hour, 100 mm/hour and 120 mm/hour and use artificial rainfall with a Rainfall Simulator. The results of this research show that the rate of erosion on soil that was given in the form of straw fibers cover layer of the paddy with the covering percentage is 30% dry weight or 38, 7gr/m2 has decreased when compared with the rate of erosion occurring on the ground without covering. The magnitude of the rate of erosion that occurred in the covering percentage is 30% dry weight of straw mulch or 38, 7 gr/m2 averages of 17,068% against the rate of erosion on the ground without covering. In other words, that the rate of erosion on soil without cover will be reduced (decreased) by an average of 82,932% if the land is given a cover layer of paddy straw fibers with a percentage of 30% or covering a dry weight of 38,7 gr/m2. Similarly, the rate of erosion on land given the paddy straw fibers cover layer with the covering percentage respectively 60% and 90% dry weight or each 145,1 gr/m2 and 354,8 gr/m2 also has decreased when compared with the rate of erosion occurring on the ground without covering. The magnitude of the rate of erosion that occurred on land given the covering 60% dry or heavy 145,1 gr/m2 on average by 7,216% and 90% cover on a layer or severe drying 354,8 gr/m2 on average by 4,392%. In other words, that the rate of erosion on soil without cover will be reduced (decreased) by an average of 92,784% on the cover of 60% and an average of 95,608% on the cover of 90%. On the rain intensity of 50 mm/hour, the erosion rate prediction equation that obtained is: E = 3,0273488 e-0,1191688(MJ/S), On the rain intensity of 100 mm/hour, the erosion rate prediction equation that obtained is: E = 6,4748371 e-0,0824717(MJ/S), and similarly, on the rain intensity of 120 mm/hour, the erosion rate prediction equation that obtained is : E = 18,4374973 e-0,0984739(MJ/S.