Open AccessModel Calibration Parameter Using Optimization Trial in HEC-HMS for Unda Watershed
Author(s) -
Gusti Agung Putu Eryani,
I Made Suniastha Amerta,
Made Widya Jayantari
Publication year - 2021
Publication title -
iop conference series. earth and environmental science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.179
H-Index - 26
eISSN - 1755-1307
pISSN - 1755-1315
DOI - 10.1088/1755-1315/930/1/012040
Subject(s) - watershed , environmental science , calibration , hydrology (agriculture) , surface runoff , computer science , mathematics , statistics , geology , machine learning , ecology , geotechnical engineering , biology
In water resource planning, information on water availability is needed. Nowadays, data on water availability is still difficult to obtain. With technology in the form of a rainfall-runoff simulation model that can predict water availability in the Unda watershed. It can add information about the potential for water in the Unda watershed. It can be used to prepare water resources management in the Unda watershed so that the existing potential can be used sustainably. Based on the rainfall simulation model results in the Unda watershed, it can be concluded that after running the initial model and calibration. The results are obtained R 2 value was 0.68 and increased by 9.81% to 0.754. Both the initial model and the calibration model show an efficient R 2 value, NASH value increases by 49.93% to 0.713, which includes satisfactory criteria, RMSE value of 1.135 and decreased by 49.47% to 0.758, and the PBIAS value was 44.70% which was classified as unsatisfactory and decreased from 80.24% to 24.80% at the time of calibration which was classified as satisfactory. In general, the overall simulation results are quite good for representing the watershed’s efficient hydrological process.