Besar Aliran Permukaan (Run-Off) Pada Berbagai Tipe Kelerengan Dibawah tegakan Eucalyptus spp. (Studi Kasus Di HPHTI PT. Toba Pulp Lestari, Tbk. Sektor Aek Nauli)

Abstract

This research aim to calculating surface run - off value under strightened of Eucalyptus spp . at HPHTI PT . Toba Pulp Lestari , Tbk . Sector of Aek Nauli . Surface run - off is important to be known to calculate of water loss , calculating number of transported land , and also precipitation of land able to lessen the depository capacities of water . Some the factors influence surface run - off is rainfall , ramp , and nature of land . Data asses the surface run - off equal to 0,0038 mm ( 8-15 % ) , 0,0053 mm ( 15-25 % ) , and 0,0071 mm ( 25-40 % ) indicating that the excelsior degree of inclination bevel hence ever greater also surface run - off that happened . Besides that , good progressively the nature of land hence smaller surface run - off that happened . Surface run - off