Base Flow Analysis in Tanralili Sub Watershed Using SWAT Model Suryansyah Surahman1 Hazairin Zubair2 Ahmad Munir2 Mahmud Achmad2
Agricultural Science, Postgraduate School, Hasanuddin University, Makassar, 90245, Indonesia.
Swat Model Research Group, Faculty of Agriculture, Universitas Hasanuddin, Makassar, 90245, Indonesia.
Email: suryansyahsurahman[at]yahoo.com
Abstract
The management of a watershed aims to realize optimal conditions of resource vegetation , soil and water this it was give maximum benefit to human welfare and sustainable. The study was aimed to identify the effect of land use change on the hydrological characteristics of the Tanralili Sub Watershed, and develop recommendations on the best land management of Tanralili Sub Watershed. There were some steps for running SWAT model, included: (1) delineate watershed- (2) create HRU^s- (3) HRU define- (4) input climate data- (5) write SWAT input files- (6) run SWAT model- (7) calibrate and validate data- and (8) simulate hydrological parameters to determine the best management practice. The study showed that the model has a good performance in predicting flow discharge with R2 and NSE values in calibration process by 0.92 and 0.70 respectively. Validation process in predicting flow discharge produced R2 and NSE values by 0.65 and 0.60 respectively. SWAT models was able to predict the effects of land use change on the base flow in Tanralili Sub Watershed . Base flow analysis of Tanralili Sub Wateshed in year of 2019 indicated 2.44 mm respectively. While the value of KRS and C was 52.60 (moderate) and 0.36 (good).
Keywords: hydrology, land use, swat model, tanralili sub watershed
Topic: Sustainable Agriculture and Rural Development
