Impact Assessment of Land-Use/Land-Cover Changes on Hydrology and Storm Water Drain Network in Yelhanka Watershed, Bangalore

Gouri, RL and Srinivas, VV and Soumya, SN and Amulya, M (2022) Impact Assessment of Land-Use/Land-Cover Changes on Hydrology and Storm Water Drain Network in Yelhanka Watershed, Bangalore. In: International Virtual Conference on Innovative Trends in Hydrological and Environmental Systems, ITHES 2021, 28 - 30 April 2021, Virtual, Online, pp. 279-291.

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Abstract

Globally, urban areas are witnessing rapid development in the recent decades, and there is growth in flash flood incidents following even short-duration storm events of less rarity (return period). Stormwater drains (SWDs) are an integral part of urban infrastructure. Owing to this, the existing natural drainage system gets affected, as the SWD network might replace only a part of the natural system. Further, changes in land-use/land-cover (LULC) associated with urbanization of catchments have implications on generated runoff in terms of increase in peak discharge, runoff volume, and velocity. An increase in runoff velocity causes a reduction in time to peak discharge, resulting in flash floods. In addition, encroachment into storm sewers limits their capacity to convey runoff, causing more devastation during floods due to an increase in stage for a given discharge. The present study is aimed at assessing LULC change in an urban catchment located in Bangalore (North) and evaluating its effect on runoff generation. Remote sensing satellite images corresponding to the years 1996, 2002, 2006, and 2012 have been analyzed to identify changes in LULC. The impact of the changes on runoff is investigated by inputting design hyetographs to Storm Water Management Model (SWMM) developed for the urban catchment for the various LULC scenarios and analyzing the runoff generated by the model. Vulnerable reaches in the existing stormwater drainage network of the studied urban catchment are identified, and the failure state of those drains is marked.

Item Type:	Conference Paper
Publication:	Lecture Notes in Civil Engineering
Publisher:	Springer Science and Business Media Deutschland GmbH
Additional Information:	The copyright for this article belongs to the Springer Science and Business Media Deutschland GmbH.
Keywords:	Catchments; Drainage; Floods; Land use; Network security; Remote sensing; Storms; Urban growth; Water management, Bangalore; Land use/land cover; Land-use land-cover changes; Land-use/land-cover; Storm water management model; Stormwater drain; Stormwater management model(SWMM); Stormwaters; Urban catchment; Urbanization and vulnerability, Runoff
Department/Centre:	Division of Interdisciplinary Sciences > Interdisciplinary Centre for Water Research Division of Mechanical Sciences > Civil Engineering
Date Deposited:	01 Jul 2022 06:24
Last Modified:	02 Jul 2022 06:26
URI:	https://eprints.iisc.ac.in/id/eprint/74087

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