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Rapid Assessment of The October 2020 Hyderabad Urban Flood and Risk Analysis Using Geospatial Data


Affiliations
1 Department of Civil Engineering, Sree Vidyanikethan Engineering College, Tirupati 517 102, India
2 Disaster Management Division, Indian Institute of Remote Sensing, Dehradun 248 001, India
3 Department of Civil Engineering, National Institute of Technology, Warangal 506 004, India
 

The present study looks into the Hyderabad urban floods of October 2020 from a geospatial perspective. The spatial extent and severity of the flooding event for a part of the urban catchment (Zone-12) of Hyderabad city are modelled using HEC-RAS 1D–2D considering 13 October 2020 rainfall event. The study compares the present flooding to the previous flooding incidence which impacted Hyderabad, almost a decade back on 24 August 2000. The study shows that rapid unplanned urbanization ignoring the regional and local hydrological landscape has aggravated the flooding severity. The study highlights the fact that rapid, uncontrolled urbanization (16.5% increase) over the last two decades have substantially influenced the urban hydrology producing higher flood volumes for comparatively small rainfall event. Thus regulating urbanization, providing enhanced drain capacity, rejuvenating the water bodies and streams is need of an hour to check and reduce the spatial flooding extent.

Keywords

Geospatial Extent, HEC-RAS, Mapping, Modelling, Urban Floods.
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  • Agilan, V. and Umamahesh, N. V., What are the best covariates for developing non-stationary rainfall intensity – duration – frequency relationship? Adv. Water Resour., 2017, 101, 11–22; https://doi.org/10.1016/j.advwatres.2016.12.016.

  • Cavanaugh, N. R., Gershunov, A., Panorska, A. K. and Kozubowski, T. J., The probability distribution of intense daily precipitation. Geophys. Res. Lett., 2015, 42(5), 1560–1567; https://doi.org/10.1002/2015GL063238.

  • Xu, H. and Luo, Y., Climate change and its impacts on river discharge in two climate regions in China. Hydrol. Earth Syst. Sci., 2015, 19(11), 4609; https://doi.org/10.5194/hess-19-46092015.

  • Emilsson, T. and Sang, A. O., Impacts of climate change on urban areas and nature-based solutions for adaptation. In Nature-based Solutions to Climate Change Adaptation in Urban Areas. Theory and Practice of Urban Sustainability Transitions (eds Kabisch, N. et al.), Springer Nature, Switzerland, 2017; https://doi.org/10.1007/978-3-319-56091-5_2.

  • UN, United Nations Expert Group Meeting on population distribution, urbanization, internal migration and development. United Nations Population Division, United Nations Secretariat, New York, 2008; http://sustainabledevelopment.un.org/content/ documents/2529P01_UNPopDiv.pdf

  • Mondal, A. and Mujumdar, P. P., Hydrologic extremes under climate change: non-stationarity and uncertainty. In Sustainable Water Resources Planning and Management under Climate Change, Springer, Singapore, 2017, pp. 39–60; https://doi.org/ 10.1007/978-981-10-2051-3_2.

  • Bayazit, M., Nonstationarity of hydrological records and recent trends in trend analysis: a state-of-the-art review. Environ. Process., 2015, 2, 527–542; http://dx.doi.org/10.1007/s40710-0150081-7.

  • Duan, W. et al., Floods and associated socioeconomic damages in China over the last century. Nat. Hazards, 2016, 82, 401–413; https://doi.org/10.1007/s11069-016-2207-2.

  • GoI, Urban flooding standard operating procedure. Ministry of Urban Development, Government of India, 2017; https://amrut.gov.in/writereaddata/SOP_Urbanflooding_5May2017.pdf

  • NDMA, GoI, Guidelines on urban flooding in India, National Disaster Management Authority, GoI, New Delhi, 2010; https://ndma.gov.in/Natural-Hazards/Urban-Floods

  • CPHEEO, Manual on Storm Water Drainage Systems, Central Public Health and Environmental Engineering Organization, GoI, 2019; http://cpheeo.gov.in/cms/manual-on-storm-water-drainagesystems--2019.php

  • Gupta, K., Challenges in developing urban flood resilience in India. Philos. Trans. R. Soc. London, Ser. A, 2020, 378(2168), 20190211; https://doi.org/10.1098/rsta.2019.0211.

  • Naik, A. S., Back into the future: the city improvement board of Hyderabad. In Cities’ Identity Through Architecture and Arts: Proceedings of the International Conference on Cities’ Identity through Architecture and Arts (CITAA 2017) (eds Catalani, A. et al.), Routledge, Cairo, Egypt, 11–13 May 2017, 1st edn; https://doi.org/10.1201/9781315166551.

  • Cohen, B., Modernising the urban environment: the Musi river flood of 1908 in Hyderabad, India. Environ. Hist., 2011, 17(3), 409–432; https://www.jstor.org/stable/41303522

  • Wikipedia, deep depression BOB 02, 2020; https://en. wikipedia.org/wiki/Deep_Depression_BOB_02_(2020) (accessed on October 2020).

  • Kharol, S. K., Kaskaoutis, D. G., Sharma, A. R. and Singh, R. P., Long-term (1951–2007) rainfall trends around six Indian cities: current state, meteorological, and urban dynamics. Adv. Meteorol., 2013, 2013, 15, Article ID 572954; http://dx.doi.org/10.1155/ 2013/572954.

  • Boyaj, A., Dasari, H. P., Hoteit, I. and Ashok, K., Increasing heavy rainfall events in South India due to changing land use land cover. Q. J. R. Meteorol. Soc., 2020; https://doi.org/10.1002/ qj.3826.

  • Ahmed, Z., Rao, D. R. M., Reddy, K. R. M. and Raj, Y. E., Urban flooding – case study of Hyderabad. Global J. Eng. Des. Technol., 2013, 2(4), 63–66.

  • The Hindu, Hyderabad registers second highest rainfall the city has ever received in 24 hours, 15 October 2020; https://www.thehindu.com/news/cities/Hyderabad/second-highest-recordedrainfallin-single-day-met-officials/article32865220.ece

  • Rangari, V. A., Sridhar, V., Umamahesh, N. V. and Patel, A. K., Floodplain mapping and management of urban catchment using HEC-RAS: a case study of Hyderabad city. J. Inst. Eng. (India): Ser. A, 2018, 100(1), 49–63; https://doi.org/10.1007/s40030-0180345-0.

  • Rangari, V. A., Umamahesh, N. V. and Bhatt, C. M., Assessment of inundation risk in urban floods using HEC RAS 2D. Model. Earth Syst. Environ., 2019, 5(4), 1839–1851; https://doi.org/ 10.1007/s40808-019-00641-8.

  • USGS Earth-Explorer, Earth-explorer data portal, 2019; http://earthexplorer.usgs.gov/ (accessed on October 2020).

  • Chavez, P. S., Image-based atmospheric corrections – revisited and improved. Photogramm. Eng. Remote Sensing, 1996, 62(9), 1025–1035.

  • Lillesand, T., Kiefer, R. W. and Chipman, J., Remote Sensing and Image Interpretation, Wiley, Hoboken, NJ, 2015, 7th edn; ISBN: 978-1-118-34328-9.

  • Congalton, R. G., A review of assessing the accuracy of classifications of remotely sensed data. Remote Sensing Environ., 1991, 37(1), 35–46.

  • The Times of India, Hyderabad roads flooded, 14 October 2020; https://timesofindia.indiatimes.com/topic/Hyderabad-roads-flooded

  • The New Indian Express, Hyderabad floods: 100 colonies under sheet of water, 15 October 2020; https://www.newindianexpress.com/states/telangana/2020/oct/15/hyderabad-floods-100-coloniesundersheet-of-water-2210468.html

  • Dhavale, S., Mujumdar, M. and Koll, R. M., Interactions between tropical cyclones and southwest monsoon over the Arabian Sea during the Monsoon onset phase. Geophys. Res. Abstr., 2019, 21, 5–35.

  • Sharma, M., Osuri, K. K., Bhalachandran, S., Vensiv, A., Mohanty, U. C. and Niyogi, D., Withdrawn: urbanization leads to changes in the rainfall timing: attribution experiments using WRF and urban sprawl in Hyderabad, India. In 98th American Meteorological Society Annual Meeting, Austin, TX, 2018.

  • Goyal, M. K. and Rao, Y. M., Impact of climate change on water resources in India. J. Environ. Eng., 2018, 144(7), 04018054; https://doi.org/10.1061/(ASCE)EE.1943-7870.0001394

  • Macrotrends, Hyderabad, India Metro Area Population 1950– 2020. 2020; https://www.macrotrends.net/cities/21275/hyderabad/ population (accessed on November 2020).

  • Urban flooding, India – urban climate change facts. In Urban Flooding, India – Urban Climate Change Factsheets, National Institute of Urban Affairs, New Delhi, India, 2016; https:// smartnet.niua.org/content/dea2681d-4921-4057-9b7a-3ba3d6b6ac26


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  • Rapid Assessment of The October 2020 Hyderabad Urban Flood and Risk Analysis Using Geospatial Data

Abstract Views: 362  |  PDF Views: 123

Authors

Vinay Ashok Rangari
Department of Civil Engineering, Sree Vidyanikethan Engineering College, Tirupati 517 102, India
C. M. Bhatt
Disaster Management Division, Indian Institute of Remote Sensing, Dehradun 248 001, India
N. V. Umamahesh
Department of Civil Engineering, National Institute of Technology, Warangal 506 004, India

Abstract


The present study looks into the Hyderabad urban floods of October 2020 from a geospatial perspective. The spatial extent and severity of the flooding event for a part of the urban catchment (Zone-12) of Hyderabad city are modelled using HEC-RAS 1D–2D considering 13 October 2020 rainfall event. The study compares the present flooding to the previous flooding incidence which impacted Hyderabad, almost a decade back on 24 August 2000. The study shows that rapid unplanned urbanization ignoring the regional and local hydrological landscape has aggravated the flooding severity. The study highlights the fact that rapid, uncontrolled urbanization (16.5% increase) over the last two decades have substantially influenced the urban hydrology producing higher flood volumes for comparatively small rainfall event. Thus regulating urbanization, providing enhanced drain capacity, rejuvenating the water bodies and streams is need of an hour to check and reduce the spatial flooding extent.

Keywords


Geospatial Extent, HEC-RAS, Mapping, Modelling, Urban Floods.

References





DOI: https://doi.org/10.18520/cs%2Fv120%2Fi12%2F1840-1847