Source: SEAMEO BIOTROP's Research Grant | 2015
The objective of the this research was: 1) to study the effect of agroforestry technique on water discharge and and sedimentation as an effort to control flood derived from Ciliwung Watershed Upstream, 2) to study the effect of combination of agroforestry technique with several soil conservation technique to produce zero runoff on water discharge and and sedimentation as an effort to control flood derived from Ciliwung Watershed Upstream, 3) to get comparison of effectivity of the effect of agroforestry techniques and combination of agroforestry techniques with other several soil conservation technique to produce zero runoff and existing condition in controlling flood derived from Ciliwung Watershed Upstream.
Validated A SWAT Model was used to simulate 3 (thee) scenario (existing condition, application of agroforestry to reach canopy cover of 60% and increase 20% of existing infiltration, and combination of agroforestry technique with other soil conservation techniques to produce zero run off).
The result show that Scenario 2 (agroforestri) and Scenario 3 (combination of technique of agroforestry and several soil conservation technique until produce zero runoff) are able to decline peak discharge and increase discharge when the discharge is low so that decline maximum-minimum discharge ratio drastically or extremely. Scenario 3 produces lower maximum-minimum discharge ratio rendah as compared Scenario 2. In the context of sedimentation, Scenario 2 and Scenario 3 is able to extremly lessen sedimentation in Ciliwung Upstream Watershed.
Model SWAT can be used as a tool or instrument to predict or estimate or assess the effect or impact of land management practices to water and sedimentation in a watershed that consist of several types of soil, land uses and its management in a certain period.