Analisis Stabilitas Lereng pada Perencanaan Penatagunaan Lahan Reklamasi Daerah Rawan Bencana di Gunung Merapi

Abstract

Kegiatan usaha pertambangan seringkali menyebabkan kerusakan lingkungan, sehingga menyebabkan penurunan mutu lingkungan. Oleh karena itu perlu dilakukan upaya penatagunaan lahan pada lahan seluas 12,45 Ha agar tidak terjadi kerusakan lingkungan yang berkelanjutan. Adanya lahan bekas galian tambang ini, maka perlu dilakukan perencanaan penguatan dinding sungai dengan mendesign dinding sungai. Pembuatan jenjang dilakukan simulasi dalam kondisi kering dan jenuh. Kondisi  jenuh geometri (n=4, H= 8m,  = 60⁰)didapatan faktor keamanan 1,99, sedangkan geometri (n=3, H= 8m,  = 60⁰)   didapatan faktor keamanan 2,52. Kondisi kering geometri kering (n=4, H= 8m,  = 60⁰)didapatan faktor keamanan 2,06, sedangkan geometri (n=3, H= 8m,  = 60⁰) didapatan faktor keamanan 3,43. Analsisis geometri lereng yang dilakukan semua dalam kondisi aman.

Mining business activities often cause environmental damage, thus causing a decrease in environmental quality. Therefore, it is necessary to make efforts to manage land use on an area of 12.45 Ha so that there is no sustainable environmental damage. With this ex-mining land, it is necessary to plan for strengthening the river wall by designing the river wall. The ladder construction was carried out in simulations under dry and saturated conditions. Geometry saturation conditions (n=4, H= 8m, \alpha = 600) obtained a safety factor of 1.99, while geometry (n=3, H= 8m, \alpha = 600) obtained a safety factor of 2.52. In dry condition, the dry geometry (n=4, H= 8m, \alpha = 600) has a safety factor of 2.06, while the geometry (n=3, H= 8m, \alpha = 600) has a safety factor of 3.43. All of the slope geometry analysis was carried out under safe conditions.