Source: SEAMEO BIOTROP's Research Grant | 2015
Abstract:
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.