ANALYSIS ABOUT THE INCREASE OF SEDIMENT AS A RESULT OF RAINFALL INTENSITY ON LUSI WATERSHED IN DISTRICT BANJAREJO BLORA

tjokro hadi polines

Abstract


Abstract

Lusi Watershed has an area of 103.6 km2, located in District Banjarejo, Blora, influenced by the tropical climate in the south-west monsoon which is characterized by a rainy season with an average rainfall of 112 mm/year, has an intensity of rainfall is about 40 mm/day to 82 mm/day. The intensity of the rainfall caused flooding runoff and concentrations of TSS resulted in increased of watershed. The purpose of this study is to describe the increase in concentration of sediment result of the high intensity of rainfall on the lusi watershed. The study was descriptive quantitatively using statistical analysis of correlation. The results showed that there is a correlation between the variables of rainfall intensity with variable of levels of sediment by 86%. When compared with the second class status of water quality, the water level in the Lusi watershed has exceeded its capacity. Recommendations from this study is necessary to control erosion due to the flow of runoff with preventing illegal logging activities in the forest in the upper reaches of the watershed.

Keywords


intensity of rainfall, river streams region, sedimentation.

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References


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DOI: http://dx.doi.org/10.26472/ijrae.v2i3.55

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