First Step Towards Coastal Hazard Line Mapping
The Stereo Digital Aerial Photography (SDAP) started as the first step towards Coastal Hazard Line Mapping to help in management of country’s coastal zone. For the purpose of SDAP, the mainland coastline has been divided into eight blocks. They are, from the Indo-Pakistan Border to Somnath in Gujarat; Somnath to Ulhas River in Maharashtra; Ulhas River to Sharawati River in Karnataka; Sharawati River to Cape Comorine in Tamil Nadu; Ponniyur River to Krishna River in Andhra Pradesh;Krishna River to Chhattapur in Orissa; and Chhattapur to Indo-Bangla Desh border in West Bengal. Based on this, the maps will be prepared in 1: 10,000 scale and pillars will be erected demarcating the hazard line.
The data of these areas will be collected and presented, flood lines over last 40 years will be identified, and sea level rise impacts of the same period will be identified. After collecting these data, a prediction of erosions to take place over next100 years will be assessed. This will be undertaken under the World Bank assisted Integrated C0astal Zone Management Project. The estimated cost of this survey is Rs 125 crore.
The Ministry also released the Shoreline Change Atlas of Orissa recently. The Atlas contains precise interpretation of shoreline change of the State. The Institute of Ocean Management, Anna University, Chennai had prepared the map. The information will be extremely useful in providing an overview of areas that are likely to be more vulnerable toto coastal erosion, identifying areas for development, conservation of coastal and marine resources and to safeguard coastal population from highly eroding and hazard areas.
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