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Estimation of Sediment Yield and Maximum Outflow Using the IntErO Model in the Sarada River Basin of Nepal

1
School of Environmental and Rural Science, University of New England, Armidale, NSW 2351, Australia
2
National Maize Research Program, Nepal Agricultural Research Council, P.O.B. 44209 Chitwan, Nepal
3
Geography, Faculty of Philosophy, University of Montenegro, Bojovica, 81400 Niksic, Montenegro
4
University of Donja Gorica, Donja Gorica, 81000 Podgorica, Montenegro
*
Author to whom correspondence should be addressed.
Water 2019, 11(5), 952; https://doi.org/10.3390/w11050952
Received: 9 April 2019 / Revised: 29 April 2019 / Accepted: 30 April 2019 / Published: 7 May 2019
(This article belongs to the Section Water Resources Management and Governance)
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Abstract

Soil erosion is a severe environmental problem worldwide as it washes away the fertile topsoil and reduces agricultural production. Nepal, being a hilly country, has significant erosion disputes as well. It is important to cognise the soil erosion processes occurring in a river basin to manage the erosion severity and plan for better soil conservation programs. This paper seeks to calculate the sediment yield and maximum outflow from the Sarada river basin located in the western hills of Nepal using the computer-graphic Intensity of Erosion and Outflow (IntErO) model. Asymmetry coefficient of 0.63 was calculated, which suggests a possibility of large floods to come in the river basin in the future whereas the maximum outflow from the river basin was 1918 m³ s−1. An erosion coefficient value of 0.40 was obtained, which indicates surface erosion of medium strength prevails in the river basin. Similarly, the gross soil loss rate of 10.74 Mg ha−1 year−1 was obtained with the IntErO modeling which compares well with the soil loss from the erosion plot measurements. The IntErO model was used for the very first time to calculate soil erosion rates in the Nepalese hills and has a very good opportunity to be applied in similar river basins. View Full-Text
Keywords: agriculture; land use; river basin; IntErO; Revised Universal Soil Loss Equation (RUSLE) agriculture; land use; river basin; IntErO; Revised Universal Soil Loss Equation (RUSLE)
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).
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MDPI and ACS Style

Chalise, D.; Kumar, L.; Spalevic, V.; Skataric, G. Estimation of Sediment Yield and Maximum Outflow Using the IntErO Model in the Sarada River Basin of Nepal. Water 2019, 11, 952.

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