GEO Research

High resolution Erosion/Accretion mapping for the coast of India

India has 7,500 km coastline (~5,400 km on the mainland) and about 250 million people live within 50 km distance from the shore.

A study on High Resolution Erosion/accretion mapping for the coast of India is undertaken to identify areas of the coast with significant erosion and accretion for the period 1975 – 2010, thereby to determine the rates of erosion/ accretion and to create a national database for coastal shoreline changes with 1975 as the base year. The research study includes determination of 100 year predicted shoreline and demarcation of shoreline displacement in 0.5m elevation contour map. This predicted shoreline can be utilized to identify potential zones for suitable sector based developments. Apart from this, the study will also indicate coastal stretches prone to erosion, which is one of the noticeable stresses on the coastal and marine ecosystems. Hence this component of the study can be used to identify loss of ecosystems along the coast to asses and plan strategies for regeneration or restoration of the ecosystems which is a substantial goal of ICZM.

The major outcomes of the study includes,

  • Erosion/Accretion status of the coast of India
  • Prediction of 100 years erosion line
  • Development of national geodatabase for coastal erosion and accretion with 1973 as the base year
  • Identification of vulnerable coastal stretches to be managed for protection of livelihoods and natural resources
  • Strategies to conserve, restore and regenerate degraded coastal and marine ecosystems (Mangroves)