This study aims to study the environmental damage caused by illegal/illegal mining of sand and stones on the slopes of Mount Merapi and the impact of the land restoration plan and its management efforts. The location of this research is in Sleman Regency, DIY, especially in Karangkendal Hamlet. Balong Hamlet, Umbulharjo Village, Cangkringan District. This area has attractive ecotourism or ecotourism potential which is supported by the majority of land use for agricultural land, aspects of nature conservation, aspects of socio-cultural economic empowerment of local communities, as well as aspects of learning and education. However, this location is also one of the locations for the deposition of sandstone and cold lava when Mount Merapi erupted. The material is a construction material so that under normal conditions, there is a process of illegal mining of sand and stone at that location by the community around the location. Problems arise due to mining activities without prior technical planning resulting in environmental damage at the location, both on the contours of the mined land into steep cliffs that are prone to landslides and disturbances to the vegetation and fauna. CV. Rubi Khan Daiman as a third party who got a job from the Sleman Regency Government to carry out land recovery mitigation activities, then collaborated with researchers to conduct the study. Based on the research results, the planned land restoration activities will not only have positive impacts but also negative impacts on the surrounding environment.
The research aims to make efforts to control dust generated in the processing industry of stones. This industrial location in the village Hargomulyo, Kokap, Kulon Progo, Yogyakarta. This study background that the andesite stroke processing industry, especially in the stone crusher tool with the flow of exhaust gas, dust arise in large numbers. Their media scattered wind the wind-borne dust is so dispersed into the environment around the site and it is dangerous to public health. It is necessary to control the spread of dust. The research was conducted in the laboratory and simulation using dust extraction equipment fogging method. Optimized variable is the diameter of the nozzle, while the others held constant magnitude replications, then the results are averaged. After doing research, the research data obtained that the optimum conditions mass of dust captured by the mist that is the nozzle diameter of 1.50 mm with an average mass of dust that can be captured by the mist that is 13327.33 g and an average efficiency value 70.69 %. Equation of a line that states the relationship between the variable diameter of the nozzle by the symbol X Masses of dust captured by the mist by the symbol Yie Y = 392.X3 + 3969,9X2 + 10090X +5542.4 the percent error 0.77%, while the equation stating the relationship between variables within the sprayer to the tools by the symbol X with the value of efficiency by the symbol Yie Y = 1, 2333X3 -13,528X2 + 40,199X + 33.878 with percent average error of 0.54%. An increase in the efficiency of dust extraction tool is then expected spread of dust into the environment as a result of the processing of andesite can be minimized so that the air quality around the site will be maintained well.
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