Evaluation of Spatial and Temporal Variability of Sediment Yield on Bilate Watershed, Rift Valley Lake Basin, Ethiopia

Mesfin Amaru Ayele; Bogale Gebremariam

doi:doi:10.11648/j.wros.20200901.12

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Evaluation of Spatial and Temporal Variability of Sediment Yield on Bilate Watershed, Rift Valley Lake Basin, Ethiopia

Mesfin Amaru Ayele, Bogale Gebremariam

Published in Journal of Water Resources and Ocean Science (Volume 9, Issue 1)

Received: 5 October 2019 Accepted: 24 December 2019 Published: 8 January 2020

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Abstract

In the watershed, sediment yield spatially and temporarily variable due to the factors for instance land use land cover, type of soil, rainfall distribution, topography and management practices. The main objective of this study was to evaluate spatial and temporal variability of sediment yield on Bilate watershed using Soil and Water Assessment Tool (SWAT) model. Simulation carried out using meteorological and spatial data by dividing watershed in to 23 sub basins with 174 Hydrologic Response Units (HRUs). Model calibration period (2001-2010) and validation period (2011-2015) performed for monthly flow and sediment data using Sequential Uncertainty Fitting (SUFI-2) within SWAT Calibration of Uncertainty Program (SWAT-CUP). Model performance efficiency checked by coefficient of determination (R²), Nash-Sutcliffe model efficiency (E_NS), and observation Standard Deviation Ratio (RSR) and percent bias (PBIAS) indicating good performance of model evaluation. From 23 sub basins, 11 were categorized from moderate to very high (10-26 ton/ha/year) sediment yielding sub basins and selected for sediment management scenarios. Scenarios result showed that average annual sediment yield reduction at entire watershed level after application of grassed waterway, filter strips, terracing and contouring were 54.45%, 30.13%, 63.26% and 59.56% respectively. Also, at treated sub basins level 68.04%, 38.41%, 80.58% and 77.42% of sediment reduction revealed after application of grassed waterway, filter strips, terracing and contouring respectively. It concluded that sediment yield reduction applying terracing was more effective than other conservation measures for affected sub basins.

Published in	Journal of Water Resources and Ocean Science (Volume 9, Issue 1)
DOI	10.11648/j.wros.20200901.12
Page(s)	5-14
Creative Commons	This is an Open Access article, distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution and reproduction in any medium or format, provided the original work is properly cited.
Copyright	Copyright © The Author(s), 2020. Published by Science Publishing Group

Keywords

SWAT Model, SUFI-2, Stream Flow, Sediment Yield, Management Scenarios, Bilate Watershed

References

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[17]	Moriasi D. N., Arnold J. G, Liew M. W., Bingner R. L., Haremel R. D. and Veith T. L. (2007). Model Evaluation Guidelines for Systematic Quantification of Accuracy in Watershed Simulations, Journal of American Society of Agricultural and Biological Engineers, 50: 885-900.
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APA Style

Mesfin Amaru Ayele, Bogale Gebremariam. (2020). Evaluation of Spatial and Temporal Variability of Sediment Yield on Bilate Watershed, Rift Valley Lake Basin, Ethiopia. Journal of Water Resources and Ocean Science, 9(1), 5-14. https://doi.org/10.11648/j.wros.20200901.12

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ACS Style

Mesfin Amaru Ayele; Bogale Gebremariam. Evaluation of Spatial and Temporal Variability of Sediment Yield on Bilate Watershed, Rift Valley Lake Basin, Ethiopia. J. Water Resour. Ocean Sci. 2020, 9(1), 5-14. doi: 10.11648/j.wros.20200901.12

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AMA Style

Mesfin Amaru Ayele, Bogale Gebremariam. Evaluation of Spatial and Temporal Variability of Sediment Yield on Bilate Watershed, Rift Valley Lake Basin, Ethiopia. J Water Resour Ocean Sci. 2020;9(1):5-14. doi: 10.11648/j.wros.20200901.12

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@article{10.11648/j.wros.20200901.12,
  author = {Mesfin Amaru Ayele and Bogale Gebremariam},
  title = {Evaluation of Spatial and Temporal Variability of Sediment Yield on Bilate Watershed, Rift Valley Lake Basin, Ethiopia},
  journal = {Journal of Water Resources and Ocean Science},
  volume = {9},
  number = {1},
  pages = {5-14},
  doi = {10.11648/j.wros.20200901.12},
  url = {https://doi.org/10.11648/j.wros.20200901.12},
  eprint = {https://article.sciencepublishinggroup.com/pdf/10.11648.j.wros.20200901.12},
  abstract = {In the watershed, sediment yield spatially and temporarily variable due to the factors for instance land use land cover, type of soil, rainfall distribution, topography and management practices. The main objective of this study was to evaluate spatial and temporal variability of sediment yield on Bilate watershed using Soil and Water Assessment Tool (SWAT) model. Simulation carried out using meteorological and spatial data by dividing watershed in to 23 sub basins with 174 Hydrologic Response Units (HRUs). Model calibration period (2001-2010) and validation period (2011-2015) performed for monthly flow and sediment data using Sequential Uncertainty Fitting (SUFI-2) within SWAT Calibration of Uncertainty Program (SWAT-CUP). Model performance efficiency checked by coefficient of determination (R2), Nash-Sutcliffe model efficiency (ENS), and observation Standard Deviation Ratio (RSR) and percent bias (PBIAS) indicating good performance of model evaluation. From 23 sub basins, 11 were categorized from moderate to very high (10-26 ton/ha/year) sediment yielding sub basins and selected for sediment management scenarios. Scenarios result showed that average annual sediment yield reduction at entire watershed level after application of grassed waterway, filter strips, terracing and contouring were 54.45%, 30.13%, 63.26% and 59.56% respectively. Also, at treated sub basins level 68.04%, 38.41%, 80.58% and 77.42% of sediment reduction revealed after application of grassed waterway, filter strips, terracing and contouring respectively. It concluded that sediment yield reduction applying terracing was more effective than other conservation measures for affected sub basins.},
 year = {2020}
}

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TY  - JOUR
T1  - Evaluation of Spatial and Temporal Variability of Sediment Yield on Bilate Watershed, Rift Valley Lake Basin, Ethiopia
AU  - Mesfin Amaru Ayele
AU  - Bogale Gebremariam
Y1  - 2020/01/08
PY  - 2020
N1  - https://doi.org/10.11648/j.wros.20200901.12
DO  - 10.11648/j.wros.20200901.12
T2  - Journal of Water Resources and Ocean Science
JF  - Journal of Water Resources and Ocean Science
JO  - Journal of Water Resources and Ocean Science
SP  - 5
EP  - 14
PB  - Science Publishing Group
SN  - 2328-7993
UR  - https://doi.org/10.11648/j.wros.20200901.12
AB  - In the watershed, sediment yield spatially and temporarily variable due to the factors for instance land use land cover, type of soil, rainfall distribution, topography and management practices. The main objective of this study was to evaluate spatial and temporal variability of sediment yield on Bilate watershed using Soil and Water Assessment Tool (SWAT) model. Simulation carried out using meteorological and spatial data by dividing watershed in to 23 sub basins with 174 Hydrologic Response Units (HRUs). Model calibration period (2001-2010) and validation period (2011-2015) performed for monthly flow and sediment data using Sequential Uncertainty Fitting (SUFI-2) within SWAT Calibration of Uncertainty Program (SWAT-CUP). Model performance efficiency checked by coefficient of determination (R2), Nash-Sutcliffe model efficiency (ENS), and observation Standard Deviation Ratio (RSR) and percent bias (PBIAS) indicating good performance of model evaluation. From 23 sub basins, 11 were categorized from moderate to very high (10-26 ton/ha/year) sediment yielding sub basins and selected for sediment management scenarios. Scenarios result showed that average annual sediment yield reduction at entire watershed level after application of grassed waterway, filter strips, terracing and contouring were 54.45%, 30.13%, 63.26% and 59.56% respectively. Also, at treated sub basins level 68.04%, 38.41%, 80.58% and 77.42% of sediment reduction revealed after application of grassed waterway, filter strips, terracing and contouring respectively. It concluded that sediment yield reduction applying terracing was more effective than other conservation measures for affected sub basins.
VL  - 9
IS  - 1
ER  -

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Author Information

Mesfin Amaru Ayele

Faculty of Hydraulic and Water Resources Engineering, Arba Minch University, Arba Minch, Ethiopia
Bogale Gebremariam

Arba Minch Water Technology Institute, Arba Minch University, Arba Minch, Ethiopia

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APA Style

Mesfin Amaru Ayele, Bogale Gebremariam. (2020). Evaluation of Spatial and Temporal Variability of Sediment Yield on Bilate Watershed, Rift Valley Lake Basin, Ethiopia. Journal of Water Resources and Ocean Science, 9(1), 5-14. https://doi.org/10.11648/j.wros.20200901.12

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ACS Style

Mesfin Amaru Ayele; Bogale Gebremariam. Evaluation of Spatial and Temporal Variability of Sediment Yield on Bilate Watershed, Rift Valley Lake Basin, Ethiopia. J. Water Resour. Ocean Sci. 2020, 9(1), 5-14. doi: 10.11648/j.wros.20200901.12

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AMA Style

Mesfin Amaru Ayele, Bogale Gebremariam. Evaluation of Spatial and Temporal Variability of Sediment Yield on Bilate Watershed, Rift Valley Lake Basin, Ethiopia. J Water Resour Ocean Sci. 2020;9(1):5-14. doi: 10.11648/j.wros.20200901.12

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@article{10.11648/j.wros.20200901.12,
  author = {Mesfin Amaru Ayele and Bogale Gebremariam},
  title = {Evaluation of Spatial and Temporal Variability of Sediment Yield on Bilate Watershed, Rift Valley Lake Basin, Ethiopia},
  journal = {Journal of Water Resources and Ocean Science},
  volume = {9},
  number = {1},
  pages = {5-14},
  doi = {10.11648/j.wros.20200901.12},
  url = {https://doi.org/10.11648/j.wros.20200901.12},
  eprint = {https://article.sciencepublishinggroup.com/pdf/10.11648.j.wros.20200901.12},
  abstract = {In the watershed, sediment yield spatially and temporarily variable due to the factors for instance land use land cover, type of soil, rainfall distribution, topography and management practices. The main objective of this study was to evaluate spatial and temporal variability of sediment yield on Bilate watershed using Soil and Water Assessment Tool (SWAT) model. Simulation carried out using meteorological and spatial data by dividing watershed in to 23 sub basins with 174 Hydrologic Response Units (HRUs). Model calibration period (2001-2010) and validation period (2011-2015) performed for monthly flow and sediment data using Sequential Uncertainty Fitting (SUFI-2) within SWAT Calibration of Uncertainty Program (SWAT-CUP). Model performance efficiency checked by coefficient of determination (R2), Nash-Sutcliffe model efficiency (ENS), and observation Standard Deviation Ratio (RSR) and percent bias (PBIAS) indicating good performance of model evaluation. From 23 sub basins, 11 were categorized from moderate to very high (10-26 ton/ha/year) sediment yielding sub basins and selected for sediment management scenarios. Scenarios result showed that average annual sediment yield reduction at entire watershed level after application of grassed waterway, filter strips, terracing and contouring were 54.45%, 30.13%, 63.26% and 59.56% respectively. Also, at treated sub basins level 68.04%, 38.41%, 80.58% and 77.42% of sediment reduction revealed after application of grassed waterway, filter strips, terracing and contouring respectively. It concluded that sediment yield reduction applying terracing was more effective than other conservation measures for affected sub basins.},
 year = {2020}
}

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TY  - JOUR
T1  - Evaluation of Spatial and Temporal Variability of Sediment Yield on Bilate Watershed, Rift Valley Lake Basin, Ethiopia
AU  - Mesfin Amaru Ayele
AU  - Bogale Gebremariam
Y1  - 2020/01/08
PY  - 2020
N1  - https://doi.org/10.11648/j.wros.20200901.12
DO  - 10.11648/j.wros.20200901.12
T2  - Journal of Water Resources and Ocean Science
JF  - Journal of Water Resources and Ocean Science
JO  - Journal of Water Resources and Ocean Science
SP  - 5
EP  - 14
PB  - Science Publishing Group
SN  - 2328-7993
UR  - https://doi.org/10.11648/j.wros.20200901.12
AB  - In the watershed, sediment yield spatially and temporarily variable due to the factors for instance land use land cover, type of soil, rainfall distribution, topography and management practices. The main objective of this study was to evaluate spatial and temporal variability of sediment yield on Bilate watershed using Soil and Water Assessment Tool (SWAT) model. Simulation carried out using meteorological and spatial data by dividing watershed in to 23 sub basins with 174 Hydrologic Response Units (HRUs). Model calibration period (2001-2010) and validation period (2011-2015) performed for monthly flow and sediment data using Sequential Uncertainty Fitting (SUFI-2) within SWAT Calibration of Uncertainty Program (SWAT-CUP). Model performance efficiency checked by coefficient of determination (R2), Nash-Sutcliffe model efficiency (ENS), and observation Standard Deviation Ratio (RSR) and percent bias (PBIAS) indicating good performance of model evaluation. From 23 sub basins, 11 were categorized from moderate to very high (10-26 ton/ha/year) sediment yielding sub basins and selected for sediment management scenarios. Scenarios result showed that average annual sediment yield reduction at entire watershed level after application of grassed waterway, filter strips, terracing and contouring were 54.45%, 30.13%, 63.26% and 59.56% respectively. Also, at treated sub basins level 68.04%, 38.41%, 80.58% and 77.42% of sediment reduction revealed after application of grassed waterway, filter strips, terracing and contouring respectively. It concluded that sediment yield reduction applying terracing was more effective than other conservation measures for affected sub basins.
VL  - 9
IS  - 1
ER  -

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