Assessing the impacts of urbanization on hydrological processes in a semi-arid river basin of Maharashtra, India

Assessing the impacts of urbanization on hydrological processes in a semi-arid river basin of... This study investigates the influence of changes in spatial urbanization on the hydrological processes of Upper Bhima River basin of Maharashtra state, India using Soil and Water Assessment Tool hydrological model based simulations. The simulated and observed monthly stream flow rates at the basin outlet were compared for calibration (1985–2004) and validation (2005–2014) of the SWAT model. For both the periods, Nash–Sutcliffe efficiency values were > 0.70, root mean square error observations standard deviation ratio (RSR) values were < 0.50 and percent bias values were < 10. Hence, with coefficient of determination (R2) of 0.89 and 0.96 both the periods showed good agreement between simulated and observed stream flow rates. Urbanization indicators viz. population urbanization level (U p ) and spatial urbanization level (U s ) were estimated to quantify the growth patterns in population and urban areas respectively. Further, correlation analysis and Multivariate analysis of variance were performed between U s and hydrological variables to study the influence of spatial urbanization on hydrological components for comprehending the existing relationships between them. Results reveal that from 1992 to 2014 with increase in U s of 1.44 to 6.31, the average annual surface runoff increased from 438.22 to 448.61 mm [standard deviation (σ) = 4.40; sum of squares (SS) = 58.20], whereas percolation decreased from 153.53 to 139.08 mm (σ = 6.06; SS = 110.10). These hydrological parameters are highly influenced by increase in urbanization. This study is relevant for water sources planners and policy makers for assessment of water resources for sustainable development in the urbanizing semi-arid river basins. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Modeling Earth Systems and Environment Springer Journals

Assessing the impacts of urbanization on hydrological processes in a semi-arid river basin of Maharashtra, India

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Publisher
Springer Journals
Copyright
Copyright © 2018 by Springer International Publishing AG, part of Springer Nature
Subject
Earth Sciences; Earth System Sciences; Math. Appl. in Environmental Science; Statistics for Engineering, Physics, Computer Science, Chemistry and Earth Sciences; Mathematical Applications in the Physical Sciences; Ecosystems; Environment, general
ISSN
2363-6203
eISSN
2363-6211
D.O.I.
10.1007/s40808-018-0446-9
Publisher site
See Article on Publisher Site

Abstract

This study investigates the influence of changes in spatial urbanization on the hydrological processes of Upper Bhima River basin of Maharashtra state, India using Soil and Water Assessment Tool hydrological model based simulations. The simulated and observed monthly stream flow rates at the basin outlet were compared for calibration (1985–2004) and validation (2005–2014) of the SWAT model. For both the periods, Nash–Sutcliffe efficiency values were > 0.70, root mean square error observations standard deviation ratio (RSR) values were < 0.50 and percent bias values were < 10. Hence, with coefficient of determination (R2) of 0.89 and 0.96 both the periods showed good agreement between simulated and observed stream flow rates. Urbanization indicators viz. population urbanization level (U p ) and spatial urbanization level (U s ) were estimated to quantify the growth patterns in population and urban areas respectively. Further, correlation analysis and Multivariate analysis of variance were performed between U s and hydrological variables to study the influence of spatial urbanization on hydrological components for comprehending the existing relationships between them. Results reveal that from 1992 to 2014 with increase in U s of 1.44 to 6.31, the average annual surface runoff increased from 438.22 to 448.61 mm [standard deviation (σ) = 4.40; sum of squares (SS) = 58.20], whereas percolation decreased from 153.53 to 139.08 mm (σ = 6.06; SS = 110.10). These hydrological parameters are highly influenced by increase in urbanization. This study is relevant for water sources planners and policy makers for assessment of water resources for sustainable development in the urbanizing semi-arid river basins.

Journal

Modeling Earth Systems and EnvironmentSpringer Journals

Published: Mar 31, 2018

References

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