Quantifying sensitivity of groundwater recharge to land use and land cover changes by improving model performance on the wetland dominated Tikur Wuha Watershed, Ethiopia

Quantifying Impacts of Future Climate on the Crop Water Requirement, Growth Period, and Drought on the Agricultural Watershed, in Ethiopia

“…In Lake Hawassa watershed majority of lowland area is occupied by seasonal and perennial agricultural land, grassland, and wetland, whereas the upland terrain is predominantly covered by wooded bush, and woodlands (Abraham, Muluneh, et al, 2022; Degife et al, 2019). The watershed is composed of several small ungauged streams (Abraham et al, 2021) draining the upland terrain toward grassland and agriculture dominated lowland area (Abraham, Muluneh, et al, 2022; Girma et al, 2020). However, recently due to population increment, deforestation, and progressive replacement of other land use by agricultural land and built-up land have been shown (Abraham, Muluneh, et al, 2022; Gebeyehu Admasu, 2015).…”

“…The watershed is composed of several small ungauged streams (Abraham et al, 2021) draining the upland terrain toward grassland and agriculture dominated lowland area (Abraham, Muluneh, et al, 2022; Girma et al, 2020). However, recently due to population increment, deforestation, and progressive replacement of other land use by agricultural land and built-up land have been shown (Abraham, Muluneh, et al, 2022; Gebeyehu Admasu, 2015).…”

“…Agricultural land, at the household level, is mainly used for Maize, Sorghum, and root crop production. In Lake Hawassa watershed majority of lowland area is occupied by seasonal and perennial agricultural land, grassland, and wetland, whereas the upland terrain is predominantly covered by wooded bush, and woodlands (Abraham, Muluneh, et al, 2022; Degife et al, 2019). The watershed is composed of several small ungauged streams (Abraham et al, 2021) draining the upland terrain toward grassland and agriculture dominated lowland area (Abraham, Muluneh, et al, 2022; Girma et al, 2020).…”

Assessment of the impact of rainfall uncertainties on the groundwater recharge estimations of the Tikur-Wuha watershed, rift valley lakes basin, Ethiopia

“…Their study findings revealed that the recharge estimates produced for the Woluwe river catchment in Belgium based on pixel-based land-use classifications are more uncertain compared with those produced using region-based classifications [ 3 ]. Abraham et al (2022) who studied the wetland-dominated Tikur-Wuha watershed explored the uncertainty and sensitivity associated with land-use maps [ 4 ]. In their study, wetland parameter was introduced in the Soil Water Assessment Tool with Calibration and Uncertainty Program (SWAT-CUP), a hydrological model, through which the uncertainties because of land-use maps were quantified using the sequential uncertainty fitting interval algorithm SUFI-2.…”

“…Previous studies [ 4 , 21 , 22 ] have shown that agricultural land use/cover of the Tikur-Wuha watershed has increased significantly. This once wetland-dominated watershed is now losing its coverage to grasslands and agriculture.…”