NOMOGRAPH OF DIFFERENT SOIL MATRIX WITH RESPECT TO ERODIBILITY AND EROSIVITY COEFFICIENTS
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Abstract
Soil erosion is a serious problem commonly happen on sloping area and inadequate vegetative cover. At construction site, soil erosion and sedimentation runoff can be worst if they are not managed and mitigated properly. Soil loss studies commonly related with soil behaviors and rainstorm characteristics. The equation that commonly used to predict the soil loss is known as Universal Soil Loss Equation (USLE). This study was carried out to achieve three objectives which were to estimate soil erodibility and rainfall erosivity coefficients with respect to the different soil matrix, to estimate the soil loss for different soil matrix on a bare plot and to establish a nomograph of different soil matrix with respect to soil erodibility and rainfall erosivity. The method of this study is carried out by laboratory works. This study has the limitations which are the soil particles only contain of sand and silt. There are nine soil matrix that have been tested on slope of 30 and 90. There are several procedures done which are sieve analysis, depth of rainfall experiments and soil loss experiments. By completing this study, the amount of soil loss have been collected using rainfall simulator equipment, rainfall erosivity coefficient have been analysed from IDF curve and calculated using the appropriate formula, length, steepness, crop management and practice erosion control factor has been analysed by the appropriate formula. The nomograph has been produced by analysing the data that have been collected through the study.
