Comparison Raunfall-Runoff Model for Ciujung-Sabagi River

Abstract

Rainfall-runoff model or rainfall runoff model is used as a tool to describe hydrological processes. The runoff flow of rain is part of the rain that flows above the soil during rain and shortly thereafter that will gather in the lake or river and eventually flow into the sea. Because rainfall runoff is what will affect the flow of the river it flows. The discharge of river water is the water level of the river that is measured by the river surface measuring instrument. The purpose of this research is to compare the calculation of F.J Mock model and Nreca model using IHACRES software. Calculation begins by searching for average rainfall by arithmetic method, then calculating evapotranspiration using Penman method, followed by calculation of F.J.Mock method, Nreca method, and value input in IHACRES software. The results of the reliable debit calculations yield R2 for the F.J.Mock method of 0.9417, for the Nreca R2 method of 0.5152, and for the IHACRES R2 software of 0.562. From the calculation results obtained F.J.Mock method most closely R2 = 1. To calculate the reliable debit in the Ciujung-Sabagi River can use the method F.J.Mock.