ENVIRONMENTAL GEOLOGY ANALYSIS IN THE EVALUATION OF DEVASTATED LAND DUE TO SAND AND GRAVEL MINING

Abstract

On the mining of sand and gravel deposits, people often do not plan well either mining development, mining or past mining . Due to the fact that It can effect to devastated land, the study of it should being done to clasify how large is. It based on kinds of parameters defined from the field. The parameters given scores based on its influence toward the devastated land (score given between 0.05 – 0.15). Those parameters be valued into three groups. Small value is 1 if the factor tends to created land better. On the contrary, if created it worse given score 3. Stages of devastate comprise into three, i.e. , low devastate, intermediet devastate and high devastate. Evaluation of risk disturbance divided into three criteria, low risk disturbance, intermediete risk disturbance and high risk disturbance. Keywords : Sand and Gravel mining, devastated land, risk disturbance