Tank Model Application for Runoff and Infiltration Analysis on Sub-Watersheds in Lalindu, Southeast Sulawesi Province

Improper land management often cause flooding, this is due to uncontrolled runoff. The runoff is influenced by the management of land cover. This study aims to analyze the flow rate by using a tank model, which can describe the magnitude of hydrologic runoff and infiltration capacity on some land use and evaluated in the study area, which is located in the watershed Lalindu, Southeast Sulawesi. The results showed that the runoff in the forest at 2,639.21 mm/yr, reeds at 2,517.05 mm/yr, palm with slopes of more than 45% at 2,715.36 mm/yr and oil with slopes of less than 45% at 2,709.59 mm/yr. Infiltration in the forest value of 30.70 mm/yr, reeds at 7:51 mm/yr, palm with slopes of more than 45% of 24.13 mm / yr and oil with slopes of less than 45% of 29.67 mm/yr. Contribute to streamflow runoff for water availability. Keywords: runoff, infilrasi, land management, models of tanks, DAS Lalind