SWAT based hydrological assessment and characterization of Lake Ziway sub-watersheds, Ethiopia

Abstract Study region Lake Ziway watershed, Ethiopia. Study focus Lake Ziway and its watershed play a significant role in supporting the livelihoods of people in the region. However, the study region is currently under heavy human pressures mainly associated with the ever increasing of human population and the subsequent intensification of agricultural development activities. The present study therefore aims at quantifying and comparing water balance components, feeder rivers’ discharge and evapotranspiration (ET) in the study region using SWAT (Soil and Water Assessment Tool) model. Flow data from 1988 to 2000 and from 2001 to 2013 were used for model calibration and validation periods respectively. New hydrological insights for the region Results show that infiltration, surface runoff, base flow and aquifer recharge were large in Katar sub-watershed while ET and lateral flow were large in Meki sub-watershed. However, surface and base flows showed decreasing trends in both sub-watersheds, yet Katar sub-watershed showed major contribution of water to Lake Ziway. The model estimated Lake Ziway and its watershed mean annual ETs as 1920 mm and 674 mm respectively, but plantation showed more ET than other land cover types in the watershed. If the current trends in irrigation development continue in the region, it is suspected that Katar and Meki Rivers are likely to cease to exist after seven decades, and so is then Lake Ziway to dry out.

[1]  H. Mooney,et al.  Human Domination of Earth’s Ecosystems , 1997, Renewable Energy.

[2]  H. Kloos,et al.  Water Resources Management in Ethiopia: Implications for the Nile Basin , 2016 .

[3]  G. Destouni,et al.  Multimethod assessment of evapotranspiration shifts due to non-irrigated agricultural development in Sweden , 2013 .

[4]  Dennis P. Lettenmaier,et al.  Effects of irrigation on the water and energy balances of the Colorado and Mekong river basins , 2006 .

[5]  B. Lemma.  Ecological changes in two Ethiopian lakes caused by contrasting human intervention , 2003 .

[6]  H. Hengsdijk,et al.  Agricultural development in the Central Ethiopian Rift valley: A desk-study on water-related issues and knowledge to support a policy dialogue , 2006 .

[7]  N. Kannan,et al.  Hydrological modelling of a small catchment using SWAT-2000 – Ensuring correct flow partitioning for contaminant modelling , 2007 .

[8]  N. Ramankutty,et al.  Estimating historical changes in global land cover: Croplands from 1700 to 1992 , 1999 .

[9]  H. Bach,et al.  From Local Watershed Management to Integrated River Basin Management at National and Transboundary Levels: Workshop Report , 2011 .

[10]  R. O G E,et al.  Interactions between the atmosphere and terrestrial ecosystems : influence on weather and climate , 1998 .

[11]  Zhengjun Liu,et al.  Changing landscape in the Three Gorges Reservoir Area of Yangtze River from 1977 to 2005: Land use/land cover, vegetation cover changes estimated using multi-source satellite data , 2009, Int. J. Appl. Earth Obs. Geoinformation.

[12]  Jesús Carrera,et al.  Multicomponent reactive transport in multicontinuum media , 2009 .

[13]  S. Seneviratne,et al.  Investigating soil moisture-climate interactions in a changing climate: A review , 2010 .

[14]  Robert B. Jackson,et al.  The hydrologic consequences of land cover change in central Argentina , 2012 .

[15]  T. Ayenew,et al.  Evapotranspiration estimation using thematic mapper spectral satellite data in the Ethiopian rift and adjacent highlands , 2003 .

[16]  K. Trenberth.  Changes in precipitation with climate change , 2011 .

[17]  S. Shang,et al.  Remote sensing temporal and spatial patterns of evapotranspiration and the responses to water management in a large irrigation district of North China , 2012 .

[18]  A. Tsunekawa,et al.  Continuing land degradation: Cause–effect in Ethiopia's Central Rift Valley , 2012 .

[19]  M. Jha.  Evaluating Hydrologic Response of an Agricultural Watershed for Watershed Analysis , 2011 .

[20]  David C. Goodrich,et al.  An integrated modelling framework of catchment‐scale ecohydrological processes: 1. Model description and tests over an energy‐limited watershed , 2014 .

[21]  C. James.  International Agricultural Research and Development , 1997 .

[22]  Lijing Wang,et al.  Using the SWAT model to assess impacts of land use changes on runoff generation in headwaters , 2014 .

[23]  J. Onyando,et al.  Lake Baringo: Addressing threatened biodiversity and livelihoods , 2006 .

[24]  Mark D. Tomer,et al.  A simple approach to distinguish land-use and climate-change effects on watershed hydrology , 2009 .

[25]  Jeffrey G. Arnold,et al.  Soil and Water Assessment Tool Theoretical Documentation Version 2009 , 2011 .

[26]  T. Ayenew.  Environmental implications of changes in the levels of lakes in the Ethiopian Rift since 1970 , 2004 .

[27]  D. J. Mulla,et al.  Hydrology and the Management of Watersheds, 3rd ed. , 2003 .

[28]  J. Nash,et al.  River flow forecasting through conceptual models part I — A discussion of principles☆ , 1970 .

[29]  Timothy K. Kratz,et al.  Effects of climate variability on lake evaporation: Results from a long-term energy budget study of Sparkling Lake, northern Wisconsin (USA) , 2005 .

[30]  Reed M. Maxwell,et al.  Feedbacks between managed irrigation and water availability: Diagnosing temporal and spatial patterns using an integrated hydrologic model , 2014 .

[31]  Jeffrey G. Arnold,et al.  Model Evaluation Guidelines for Systematic Quantification of Accuracy in Watershed Simulations , 2007 .

[32]  S. B. Awulachew,et al.  Irrigation practices in Ethiopia: characteristics of selected irrigation schemes. , 2007 .

[33]  Z. Şen,et al.  Regional fuzzy chain model for evapotranspiration estimation , 2017 .

[34]  W. Gburek.  Hydrology and the Management of Watersheds , 1998 .

[35]  J. David Allan,et al.  Landscape influences on stream biotic integrity assessed at multiple spatial scales , 1996, Landscape Ecology.

[36]  G. Yohe,et al.  Risk aversion, time preference, and the social cost of carbon , 2009 .

[37]  Xiaotong Zhang,et al.  Using Bayesian model averaging to estimate terrestrial evapotranspiration in China , 2015 .

[38]  Susanna T. Y. Tong,et al.  Modeling the relationship between land use and surface water quality. , 2002, Journal of environmental management.

[39]  Fred F. Pollitz,et al.  Geodetic slip model of the 2011 M9.0 Tohoku earthquake , 2011 .

[40]  S. Kanae,et al.  Global Hydrological Cycles and World Water Resources , 2006, Science.

[41]  René Therrien,et al.  Simulating coupled surface and subsurface water flow in a tile-drained agricultural catchment , 2015 .

[42]  E. Noordman,et al.  SEBAL model with remotely sensed data to improve water-resources management under actual field conditions , 2005 .

[43]  Günter Blöschl,et al.  A regional analysis of event runoff coefficients with respect to climate and catchment characteristics in Austria , 2009 .

[44]  C. Tol,et al.  Groundwater and unsaturated zone evaporation and transpiration in a semi-arid open woodland , 2017 .

[45]  Indrajeet Chaubey,et al.  SENSITIVITY ANALYSIS, CALIBRATION, AND VALIDATIONS FOR A MULTISITE AND MULTIVARIABLE SWAT MODEL 1 , 2005 .

[46]  Y. Travi,et al.  Lake evaporation estimates in tropical Africa (Lake Ziway, Ethiopia) , 2001 .

[47]  Ian R. Calder,et al.  The impact of land use change on water resources in sub-Saharan Africa: a modelling study of Lake Malawi , 1995 .

[48]  S. Seneviratne,et al.  A regional perspective on trends in continental evaporation , 2009 .

[49]  O. Kolditz,et al.  A coupled surface/subsurface flow model accounting for air entrapment and air pressure counterflow , 2013, Environmental Earth Sciences.

[50]  P. Döll.  Vulnerability to the impact of climate change on renewable groundwater resources: a global-scale assessment , 2009 .

[51]  N. Sriwongsitanon,et al.  Effects of land cover on runoff coefficient , 2011 .

[52]  G. McBoyle.  Climate in review , 1973 .

[53]  S. Swenson,et al.  Satellites measure recent rates of groundwater depletion in California's Central Valley , 2011 .

[54]  M. H. Costa,et al.  Effects of large-scale changes in land cover on the discharge of the Tocantins River, Southeastern Amazonia , 2003 .

[55]  S. Tyler,et al.  Evaporation and land surface energy budget at the Salar de Atacama, Northern Chile , 2005 .

[56]  Genxu Wang,et al.  Impact of land-use change on hydrological processes in the Maying River basin, China , 2006 .

[57]  John R. Williams,et al.  LARGE AREA HYDROLOGIC MODELING AND ASSESSMENT PART I: MODEL DEVELOPMENT 1 , 1998 .

[58]  E. A. Sudicky,et al.  A simple iterative method for estimating evapotranspiration with integrated surface/subsurface flow models , 2015 .

[59]  A. Robock,et al.  The Global Soil Moisture Data Bank , 2000 .

[60]  R. B. Wood,et al.  Chemical and algal relationships in a salinity series of Ethiopian inland waters , 2004, Hydrobiologia.

[61]  Erin D. Zoski,et al.  Tile Drainage Management Influences on Surface-Water and Groundwater Quality following Liquid Manure Application. , 2013, Journal of environmental quality.

[62]  Gilbert T. Bernhardt,et al.  A comprehensive surface-groundwater flow model , 1993 .

[63]  Garry R. Willgoose,et al.  A statistic for testing the elevation characteristics of landscape simulation models , 1994 .

[64]  Shuai Wang,et al.  Soil moisture and evapotranspiration of different land cover types in the Loess Plateau, China , 2012 .

[65]  F. Taheri,et al.  Urban sprawl and its impacts on land use change in Central Ethiopia , 2016 .

[66]  Misgana K. Muleta,et al.  Sensitivity and uncertainty analysis coupled with automatic calibration for a distributed watershed model , 2005 .

[67]  Y. Hong,et al.  Deriving scaling factors using a global hydrological model to restore GRACE total water storage changes for China's Yangtze River Basin , 2015 .

[68]  A. Pérez-Foguet,et al.  Assessment of water resources management in the Ethiopian Central Rift Valley: environmental conservation and poverty reduction , 2014 .

[69]  Francesca Caparrini,et al.  Estimating land cover effects on evapotranspiration with remote sensing: a case study in Ethiopian Rift Valley , 2006 .

[70]  Zhuguo Ma,et al.  Reservoir Operation with Feedback in a Coupled Land Surface and Hydrologic Model: A Case Study of the Huai River Basin, China , 2016 .

[71]  M. Coe,et al.  Deforestation offsets water balance changes due to climate variability in the Xingu River in eastern Amazonia , 2015 .

[72]  S. Kebede,et al.  Hydrogeochemical and lake level changes in the Ethiopian Rift. , 2006 .

[73]  Gordon B. Bonan,et al.  Anthropogenic land cover changes in a GCM with surface albedo changes based on MODIS data , 2010 .

[74]  Ashok Kumar,et al.  A coupled surface/subsurface flow model accounting for air entrapment and air pressure counterflow , 2013 .

[75]  J. Famiglietti,et al.  Satellite-based estimates of groundwater depletion in India , 2009, Nature.

[76]  P. Hellegers,et al.  Land and water resources assessment in the Ethiopian Central Rift Valley : project: ecosystems for water, food and economic development in the Ethiopian Central Rift Valley , 2007 .

[77]  Hans-Georg Frede,et al.  Comparison of two different approaches of sensitivity analysis , 2002 .

[78]  L. S. Pereira,et al.  Crop evapotranspiration : guidelines for computing crop water requirements , 1998 .

[79]  T. Ayenew,et al.  Effect of improper water and land resource utilization on the central Main Ethiopian Rift lakes , 2006 .