|Title:||Performance evaluation of potential inland flood management options through a three-way linked hydrodynamic modelling framework for a coastal urban watershed|
Prakash Mohanty, MohitP.
|Published in:||Hydrology Research|
|Abstract:||This study proposes a novel comprehensive hydrodynamic flood modelling framework over Mithi river watershed in Mumbai, India, a coastal urban area, to reduce the inundation extent by incorporation of different inland hydraulic scenarios. First, the study addresses the issue of data scarcity by adapting alternate robust techniques to estimate design rainfall, tidal elevation and discharge, the key inputs for a flood model. Following that, a three-way linked flood model has been developed in the MIKE FLOOD platform, considering river, stormwater, overland flow and tidal influence to generate flood inundation and subsequently hazard maps for various inland hydraulic scenarios, by incorporating different feasible cross-sections and lining materials. The flood inundation and hazard maps have been derived for 10-, 50- and 200-year return periods of design rainfall, discharge and tide to identify the best possible flood-reducing hydraulic scenario. It is observed that a 'trapezoidal river cross-section lined with concrete' relatively maximizes the reduction in flooding extent. The proposed framework can be implemented as an effective flood mitigation strategy in data-scarce, densely populated and space-constrained areas. © 2021 The Authors Hydrology Research|
|Citation:||Hydrology Research, 52(1): 61-77|
|Author Scopus IDs:||57222094503|
|Author Affiliations:||Ghosh, M., Interdisciplinary Program in Climate Studies, Indian Institute of Technology Bombay, Mumbai, 400076, India|
Mohanty, M.P., Environmental Science and Engineering Department, Indian Institute of Technology Bombay, Mumbai, 400076, India
Kishore, P., Environmental Science and Engineering Department, Indian Institute of Technology Bombay, Mumbai, 400076, India
Karmakar, S., Interdisciplinary Program in Climate Studies, Indian Institute of Technology Bombay, Mumbai, 400076, India, Environmental Science and Engineering Department, Indian Institute of Technology Bombay, Mumbai, 400076, India, Centre for Urban Science and Engineering, Indian Institute of Technology Bombay, Mumbai, 400076, India
|Funding Details:||The work presented here is supported by the Ministry of Earth Sciences (MoES), Govt. of India (Project No. 14MES003) and Department of Science & Technology (SPLICE-Climate Change Programme), Government of India (Project reference number DST/CCP/CoE/140/2018, Grant Number: 00000000000010013072 (UC ID: 18192442)). The authors are grateful to the editor Prof. Qi Zhang and the anonymous reviewers for their insightful comments which helped us to improve the manuscript. The authors thank the MCGM for providing the shapefile and network cross-section details for the study area. The authors are also grateful to NRSC for providing the LULC maps, IMD Pune for rainfall data and Indian National Centre for Ocean Information Services, Hyderabad for the tidal elevation data. The authors are also grateful to Ms Sheeba Sekharan for her contribution in shaping the manuscript. The support towards computational resources has been provided by IIT Bombay. Department of Science and Technology, Ministry of Science and Technology, India, डीएसटी: 18192442, 00000000000010013072, DST/CCP/CoE/140/2018; Ministry of Earth Sciences, एमओईएस: 14MES003|
|Corresponding Author:||Karmakar, S.; Interdisciplinary Program in Climate Studies, India; email: firstname.lastname@example.org|
|Appears in Collections:||Journal Publications [WR]|
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