Impacts of Climate and Land Use Change on Hydrological Response in Gumara Watershed, Ethiopia

<div> <p>In this study, we investigated the separate and combined impacts of climate and land-use changes on hydrological response in the Central Highlands of Vietnam during the period 1981-2009. The Mann-Kendall and Pettit tests were applied to detect the trends in the hydro-meteorological data. The Soil and Water Assessment Tool (SWAT) was setup in the region, and evaluation based on daily data highlights the models adequacy. From this, the responses of hydrology to climate variability and land-use changes were considered. Overall, variability in climate seems to strongly drive the variability in the hydrological response in comparison to alternations in the hydrological regime due to land-use change during the period 1981-2009. The results indicate that land-use change had a minor impact on the annual flow (0.4% reduction), whilst the impact from climate variability had been more significant (13.5% change). Under the impact of coupled climate variability and land-use change, the annual streamflow increased by 13.1%.</p> </div> <p> </p>

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MODELLING THE HYDROLOGICAL RESPONSE TO LARGE SCALE LAND USE CHANGE

Space and Time Scale Variability and Interdependencies in Hydrological Processes ◽

10.1017/cbo9780511564475.007 ◽

1995 ◽

pp. 63-88 ◽

Cited By ~ 3

Author(s):

A. Henderson-Sellers ◽

K. McGuffie ◽

T.B. Durbidge

Keyword(s):

Land Use ◽

Land Use Change ◽

Large Scale ◽

Hydrological Response ◽

Large Scale Land

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Assessing the impact of climate and land-use change on the hydrological response of the upper Betwa River basin

10.5194/egusphere-egu21-14062 ◽

2021 ◽

Author(s):

Amit Kumar ◽

Kumar Gaurav

Keyword(s):

Land Use ◽

Land Use Change ◽

River Basin ◽

Assessment Tool ◽

Hydrological Cycle ◽

Central India ◽

Hydrological Response ◽

Open Land ◽

The Mean ◽

The Impact

<p>Climate and land-use change have altered the regional hydrological cycle. As a result, the mean summer monsoon rainfall has decreased by 10 % over central India during 1950-2015. This study evaluates the combined effect of climate and land-use change on the hydrological response of the upper Betwa River basin in Central India. We use Landsat satellite images from 1990 to 2018 to compute the changes in various land-use types; waterbody, built-up, forest, agriculture, and open land. In the past two decades, we found that the water body, built-up, and cropland have increased by 63 %, 65 %, and 3 %, respectively. However, forest and open land have decreased by 16 % and 23 %. Further, we observed a significant increase in annual average temperature and a decrease in the mean rainfall in the study area during 1980-2018.</p><p>We then coupled the land-use change with weather parameters (precipitation, temperature, wind speed, solar radiation, and relative humidity) and setup the SWAT (Soil and water assessment tool) model to simulate the hydrological responses in the catchment. We have run this model for two different time steps, 1980-2000 and 1998-2018, using the land-use of 1990 and 2018. Calibration and validation are performed for (1991-1994, 2000-2004) and (1995-1998, 2005-2008) respectively using SUFI-2 method. Our results show that the surface runoff and percolation decreased by -21 and -9 %, whereas evapotranspiration increased by 3 % in the upper Betwa River basin during 2001-2018. A decrease in rainfall, runoff, and percolation will have considerable implications on regional water security.</p>

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Land use change and hydrological response in the Camel catchment, Cornwall

Applied Geography ◽

10.1016/j.apgeog.2003.11.002 ◽

2004 ◽

Vol 24 (2) ◽

pp. 119-137 ◽

Cited By ~ 36

Author(s):

A Sullivan ◽

J.L Ternan ◽

A.G Williams

Keyword(s):

Land Use ◽

Land Use Change ◽

Hydrological Response

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Modeling change of Land use on Hydrological Response of River by Remedial Measures using Arc SWAT: Case of Weib Catchment, Ethiopia

International Journal of Innovative Technology and Exploring Engineering - Special Issue ◽

10.35940/ijitee.j9531.0981119 ◽

2019 ◽

Vol 8 (11) ◽

pp. 2381-2390

Keyword(s):

Land Use ◽

Land Use Change ◽

Land Cover ◽

Assessment Tool ◽

Base Flow ◽

Coefficient Of Determination ◽

Hydrological Response ◽

Cultivated Land ◽

Natural Ecosystems ◽

The Impact

Ethiopia has altered natural ecosystems through experiencing a huge amount of land use change has effect on the hydrological condition. Therefore, this study was initiated to compare the past and potential future change of land use with its effect the hydrological response of the Weib catchment which is found in the upper Genale Dawa River basin which covers a total area of 7407.42km2. The Soil and Water Assessment Tool model was used to compare the impact of land use change on stream flow of the study area. The study was used model by using readily available spatial and temporal data and calibrated against measured discharge. The analysis of land use change has shown that the Settlement area has increased from 12.8% to 30.8%, cultivated land from 10.8% to 39.1% between 1986 and 2010, while area of Forest has reduced from 32.5% to 9.4 % and Grassland from 20.9% to 12.3%. The performance of the model was evaluated based on performance rating criteria, coefficient of determination, Nash and Sutcliff efficiency values for monthly runoff were 0.85 and 0.81during calibration, 0.88 and 0.87 during validation, respectively. The evaluation of the model response to changes indicated that the mean wet monthly flow for 2010 land cover enlarged by 40.7 % from 1986 land cover. Similarly, the 1986 land cover mean month flow was higher by 10% than the 1995 land cover flow for wet months. The dry average monthly flow was less by 45.2 %, for 2010 and 26 % for 1995 land covers when compared to that of 1986 land cover. The rapid conversion of Forest and Grassland cover to Urban and cultivated land resulted in higher peak flow and less base flow on Weib river hydrology.

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