Criticality Analysis of Recharge Area In Upper Cisadane Watershed

Radius Pranoto, Satyanto K. Saptomo, Roh Santoso B. Waspodo

Abstract


The aims of this research were to (1) identify criticality of recharge area; and (2) analyze water balance of Upper Cisadane Watershed. Identification of recharge area criticality refers to regulation of the Minister of Forestry, Republic of Indonesia Number: P.32/MENHUT-II/2009 by scoring and overlaying of slope, soil type, rainfall, and land use map. SCS-CN (Soil Conservation Service-Curve Number) method was used to analyze runoff and infiltration on each level of recharge area criticality. The criticality of recharge area in the Upper Cisadane Watershed in 2006, 2009, and 2013, are: (1) good: 27.4%, 20.3%, 19.9%; normal: 11.9%, 7.8%, 5.6%; (3) ranging critical: 16.4%, 7.5%, 5.4%; (4) rather critical: 25.3%, 25.6%, 30.6%; (5) critical: 15.3%, 22.2%, 21.6%; and (6) very critical: 3.7%, 16.6%, 17%. We concluded that recharge area with good and normal conditions have an infiltration rate more than surface runoff, while the infiltration rate at recharge area with ranging critical, rather critical, critical and very critical condition less than surface runoff that occured in 2006, 2009 and 2013.

Keywords


Criticality, recharge area, overlay, scoring, surface runoff, infiltration

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DOI: https://doi.org/10.24203/ajet.v5i1.4234

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