Gis Based Flood Hazard Mapping of Adyar Watershed, Chennai, India

Suriya, S.; Mudgal, B. V.

doi:10.5176/2301-394x_ace16.42

Cited by 2 publications

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“…To set the scene for the following analyses, Chennai's growth and the evolution of its periurban shall receive attention with a special focus on administrative setup and planning challenges. Eris in peri-urban areas have recently gained attention to relieve the city from water stress for both, water retention to reduce urban flood risk as well as drinking water to ease water scarcity in the city (Anuradha et al, 2009;Ramakrishnan Harishankar and Vedamuthu, 2019;Sharmila et al, 2015;Suriya and Mudgal, 2014). A prominent example for this is Chembarambakkam Reservoir, which was a rural eri with its own irrigation area in the past.…”

Section: Planning Strategies and Activitiesmentioning

confidence: 99%

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Urban Eris: Water body transformation in peri-urban Chennai, South India

Haufe

2024

Preprint

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Peri-urbanisation has been conceptualised during the recent years. In this research work, peri-urbanisation is viewed through the lens of water body conversion from rural to eventually urban use. Underlying power relations and networks are examined, using an assemblage thinking approach combined with the framework of Situated (Urban) Political Ecology on a case study in peri-urban Chennai, Tamil Nadu, South India. Chennai experiences rapid expansion and its peri-urban zone tells numerous stories of transformation. The underlying rural landscape was defined by the eri (or tank) system and has evolved as a cultural landscape within the past centuries. An eri (Tamil: lake, reservoir) is a semi-natural water body, which catches water during monsoon to retain and release it during the dry season. With the help of eris, agriculture was enabled throughout the year by creating a balance between wet and dry seasons. Eris are connected to each other and form a system of water bodies, which increases the efficiency of water retention as the capacities of the entire system can be utilised through spillover from one eri to another. Within the current context of urbanisation however, eris have to change their meaning to fit into the new setting. This research is focussed on how eris in peri-urban Chennai are being transformed from rural irrigation reservoirs to urban water bodies - a transformation with very diverse outcomes, ranging from modern drinking water reservoirs to decaying water bodies used as landfills. Moreover, the eri defines its surroundings in the traditional cultural landscape, by creating two types of land: irrigated farmland under individual ownership and common land. Peri-urbanisation of eris usually includes their disconnection from their immediate surroundings on the physical, social and administrative level. The characteristics of the two traditional land types and their connection to the eri shape the peri-urbanisation process in regard to legal security, pace of change, land value, environmental and social impact. This results in urban areas of different characteristics, which are based on their former rural land type. The eri as defining landscape feature can therefore be seen as peri-urban development nucleus. Hence, the term "urban eri" is established to define a water body, which has undergone disconnection from its earlier rural surroundings to be reintegrated into its later urban context, thus (re)shaping access mechanisms and the future urban form.

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Section: Planning Strategies and Activitiesmentioning

confidence: 99%

“…The point of convergence of the major feeders into Adyar River near Thiruneer Malai were selected as defining points. Alternatively, other works suggest four subbasins for the Adyar Basin(Suriya and Mudgal, 2014).Urban Eris. Water body transformation in peri-urban Chennai, South India…”

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confidence: 98%

Urban Eris: Water body transformation in peri-urban Chennai, South India

Haufe

2024

Preprint

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“…A flood hazard map of the Adayar river using Remote Sensing (RS) and a Geographic Information System (GIS) was developed by [36]. Numerical modelling of the Adayar river flooding using HEC RAS software was done by [3].…”

Section: Studies On the Adayar Rivermentioning

confidence: 99%

Socio–Economic Analysis of Riverine Flooding on Low-Income Dwellings: Adayar River, a Case Study

Saravanan¹,

Basavaraj

Nelliyat

2020

Civil and Environmental Engineering Reports

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Flood damage assessment plays a vital role in providing information to policy developers. Nowadays, due to urbanization, the impact of flooding on communities is extensive, including tangible damage to property, the environment, and infrastructure as well as intangible damage due to stress, health hazards, and hardship. This paper provides an overview of a detailed flood assessment study conducted in the Kotturpuram Housing board area, located on the flood plain of the Adayar River in Chennai, India. A relatively simple approach to data collection was adopted, being a Questionnaire Survey (QS) as well as semi-structured interviews and observation techniques, due to data and research limitations. Losses due to damage to belongings and extra spending to buy essential commodities during flooding are also dealt with in this study. The flood mitigation costs for flooding that occurred in the year 2015 are also evaluated. A stage-damage curve was arrived at based on the information collected. Optimal and sustainable mitigation measures can be achieved only when the socio-economic aspects are adequately considered. Thus, this analysis was designed to estimate the effects of flooding on a community’s social and economic welfare, and thereby help to educate the community, including residents and officials, about the impact and magnitude of flooding. The outputs of the study will be the key inputs for designing flood mitigation and relief measures.

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Gis Based Flood Hazard Mapping of Adyar Watershed, Chennai, India

Cited by 2 publications

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Urban Eris: Water body transformation in peri-urban Chennai, South India

Urban Eris: Water body transformation in peri-urban Chennai, South India

Socio–Economic Analysis of Riverine Flooding on Low-Income Dwellings: Adayar River, a Case Study

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