Potential implications of land use/land cover change and climate variability on ungauged watershed hydrology Online publication date: Thu, 09-Apr-2020
by Afera Halefom; Asirat Teshome; Ermias Sisay
International Journal of Hydrology Science and Technology (IJHST), Vol. 10, No. 2, 2020
Abstract: In Farta watershed, the impact of land use/land cover (LULC) change and climate variability on hydrological processes was simulated using the soil and water assessment tool (SWAT). The values of R2, NSE, RSR and PBIAS were 0.79, 0.67, 0.82 and 4.8% throughout calibration and 0.61, 0.69, 0.69, and 5.2% throughout validation respectively. Climate trend were analysed in the study area by using Mann-Kendall (MK) test. Percentage change of 10.94%, 8.13% and 16.09% for average annual temperature, mean maximum temperature and mean minimum temperature were observed respectively. The four Landsat images (2000, 2005, 2010 and 2017) were classified into five major LULC classes and areal extent of each LULC were 9.2 Km2 urban, 8.5 Km2 plantations, 5.7 Km2 waterbody, −22.3 Km2 agricultural land and −1.0 Km2 pastureland. The combined effects of LULC and climate variability in the study area should be taken into consideration for the water resources planning and management.
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