| dc.description.abstract | This research was conducted to estimate the baseflow at five watersheds in UPT PSDA Pamekasan (Madura - Eastern part
of East Java, Indonesia). The methods used in this research was the graphics methods (Local Minimum Method and Fixed Interval
Method) and RDF (Recursive Digital Filters) method (Eckhardt Filter). Methodology consist of: (1) data inventoring, (2) data
processing, (3) calibrating and validating, and (4) evaluating of models performances. Daily discharge were used as main input for
the baseflow analysis, then each recursive digital filter used to separate the baseflow from the total daily discharge. Furthermore,
each algorithm was calibrate using daily discharge data for each year. The mean values of parameters obtained used to separate
baseflow for whole period of record. RMSE, scatter plot and FDC used to evaluate the model performance during dry period (Juli to
September – with assumtion that there was no rainfall occurred in this period). Calibration was conducted on each watershed with
the same technique. Validation was conducted from the watershed complete data (Blega Telok watershed) to others watersheds. The
results showed that Fixed Interval Method perform better then others algorithms. | en_US |
