Modeling Hydrological Responses to Land Use Dynamics, Choke, Ethiopia

Gessesse, Agenagnew A.; Melesse, Assefa M.; Abera, Fikru F.; Abiy, Anteneh Z.

doi:10.1007/s41101-019-00076-3

Cited by 13 publications

(10 citation statements)

References 43 publications

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“…In flat-sloping regions of low lands, surface runoff is also higher on cultivated land, resulting in human activities in the watershed and significant driving factors for LULC change. These findings agree with other similar efforts [5,14,[34][35][36]38,85].…”

Section: Effects and Implications Of Lulc Change On Surface Runoffsupporting

confidence: 93%

“…Similar efforts in Ethiopia reported that expansion of agricultural land diminishing forest, shrubland, and grasslands increased runoff, decreasing recharge [14,23,26,36,54]. This produces flooding during the rainy season, decreasing low flow during the dry period.…”

Section: Discussionmentioning

confidence: 87%

“…2) indicate that objective functions were acceptable for model evaluation [75,76]. Several authors [14,23,36,40,57,62] calibrated the SWAT model in other Ethiopian watersheds. They mainly reported statistical performance indicators of R 2 , NSE, and PBIAS based on [75], comparable with the present findings.…”

Section: Assessing Hydrological Model Performance On Streamflowmentioning

confidence: 99%

“…In Africa, the influence of LULC is much larger than climate variability [12]. The spatiotemporal variability of groundwater recharge and streamflow is essential in understanding the abstraction scenarios of water management [13,14]. Groundwater is a preferable water supply over surface water, while the extreme inter-annual rainfall variations stress surface water availability [15].…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Impacts and Implications of Land Use Land Cover Dynamics on Groundwater Recharge and Surface Runoff in East African Watershed

Mengistu

Chung

Kim

et al. 2022

Water

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Assessing the spatiotemporal dynamics of land use land cover (LULC) change on water resources is vital for watershed sustainability and developing proper management strategies. Evaluating LULC scenarios synergistically with hydrologic modeling affords substantial evidence of factors that govern hydrologic processes. Hence, this study assessed the spatiotemporal effects and implications of LULC dynamics on groundwater recharge and surface runoff in Gilgel Gibe, an East African watershed, using the Soil and Water Assessment Tool (SWAT) model. Three different LULC maps (2000, 2010, and 2020) were derived from Landsat images, and the comparisons pointed out that the land-use pattern had changed significantly. The agricultural land and grassland cover increased by 3.76% and 1.36%, respectively, from 2000 to 2020. The implications acquired for 2000 show that forested land covers decreased by 5.49% in 2020. The SWAT simulation process was executed using a digital elevation model, soil, LULC, and weather data. The model was calibrated and validated using streamflow data to understand the surface runoff and groundwater recharge responses of each Hydrologic Response Units on reference simulation periods using the Calibration and Uncertainty Program (SWAT-CUP), Sequential Uncertainty Fitting (SUFI-2) algorithm. The observed and simulated streamflows were checked for performance indices of coefficient of determination (R2), Nash–Sutcliffe model efficiency (NSE), and percent bias (PBIAS) on monthly time steps. The results show that there is good agreement for all LULC simulations, both calibration and validation periods (R2 & NSE ≥ 0.84, −15 < PBIAS < +15). This reveals that for the LULC assessment of any hydrological modeling, the simulation of each reference period should be calibrated to have reasonable outputs. The study indicated that surface runoff has increased while groundwater decreased over the last two decades. The temporal variation revealed that the highest recharge and runoff occurred during the wet seasons. Thus, the study can support maximizing water management strategies and reducing adverse driving environmental forces.

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Section: Effects and Implications Of Lulc Change On Surface Runoffsupporting

confidence: 93%

Section: Discussionmentioning

confidence: 87%

Section: Assessing Hydrological Model Performance On Streamflowmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Impacts and Implications of Land Use Land Cover Dynamics on Groundwater Recharge and Surface Runoff in East African Watershed

Mengistu

Chung

Kim

et al. 2022

Water

View full text Add to dashboard Cite

show abstract

“…Therefore, even though the model shows a satisfactory performance at the downstream part of the basin, the calibrated model with a very good performance at the upper-part should represent the downstream part of the basin as well. Overall, according to other studies in this field (Almeida et al, 2018;Fernandez et al, 2005;Gessesse et al, 2019;Motovilov et al, 1999;Yanto et al, 2017), the calibrated and validated model is classified as satisfactory (e.g., station Melka-Selki) to very-good (e.g., station Melka-Kuntrea). Alazzy et al (2017) concluded that application of high-quality rainfall products in hydrological models produces comparable results to data from ground stations.…”

Section: Discussionmentioning

confidence: 66%