ANALYSIS OF DAILY RAINFALL AND RUNOFF DATA OF SERANG •RIVER BASIN, INDONESIA

Abstract

Linear Perturbation Model (LPM) is a simple and versatile technique used to extend the runoff record using rainfall data. Model developed by Nash and Barsi (1983) for flow forecasting on larger catchment considering the relatively regular seasonal variation of potential evaporation has been studied in detail utilizing the daily rainfall runoff data of 10 raingauge stations and 3 discharge sites of Serang river basin, Indonesia. The specific objectives of the study are as follow : 1. Processing of the daily rainfall and runoff data of Serang basin, Indonesia. 2. To develop/understand the methodology of linear perturbation model. 3. To evaluate the performance of linear perturbation model and compare it with the performance of single input total response linear model in calibration and validation mode. 4. To study the effect of number of error terms on efficiency of the model 5. To study the periodic structure of the daily time series of rainfall and runoff data using harmonic analysis. 6. And finally to suggest the rainfall runoff model parameters which can be used to extend the runoff records of three sites of Serang basin.