PENGARUH UMUR REKLAMASI LAHAN BEKAS TAMBANG BATUBARA TERHADAP FUNGSI HIDROLOGIS

ABSTRACTThe research was conducted at the PT. Adaro coal mining area in watershed Barito, a sub-watershed Negara, South Kalimantan Province. The aims of the study were: 1) to analysis impacts of land reclamation on soil physical properties; and 2) to analysis impact of coal mine land reclamation on the hydrological functions of watershed. Runoff, erosion and carbon sequistration plots were establisment at different any method of reclamation. Characteristics of soil physic were observed in each plot. The results showed: 1). Bulk density, porosity and permeability were not significantly but showed a decrease in the Bulk density and an increase in porosity and permeability of soil. 2). The largest erosion occurred in TP (130.28 tons/ha) and the lowest erosion found AP (13.97 tons/ha). The largest runoff occurred in TP (263.73 mm) and the lowest runoff found AP (75.17 mm). Revegetation at the reclamation methods, significanly reduces the rate of erosion and runoff, increased porosity, permeability and infiltration. Nevertheles, bulk density is hihger then forest soil