Development of Spectral Library of Mangroves, Seagrass and Seaweed

 / Research / In-House /CMR/ Development of Spectral Library of Mangroves, Seagrass and Seaweed

The Project

Spectral signature, the unique variations of reflected electromagnetic radiations as function of wavelengths helps in identifying terrain features and is the fundamental means of data representation and analysis in all forms of passive (reflected sunlight) remote sensing. A spectral library categorizes the spectral reflectance signatures collected using spectroradiometers through a standardized procedure from laboratory or field measurements along with metadata. It helps to characterize the features on earth and its variability and diversity globally. India with a long coastline of about 7500 km bordered by Arabian Sea in the West and Bay of Bengal in the East sustains luxuriant coastal vegetation comprising of mangroves, seagrass, salt marsh and seaweeds.

Aim

Development of spectral library of coastal vegetation and implementation of a consistent method for the collection of spectral data and associated metadata

Objectives

  • Development of protocols for collection of mangroves and seagrass spectral signatures

  • Development of a standard design for spectral library of mangroves – seagrass and associated metadata
  • Optical characterization of seagrass – mangroves using hyperspectral radiometers

Key Findings

Publications

Measurement of in-vivo spectral reflectance of bottom types: Implications for remote sensing of shallow waters
Pravin Jeba Dev, Gejo Anna Geevarghese, R. Purvaja, R. Ramesh. (2022)
Advances in Space Research, Vol. 69(12), pp. 4240-4251
2022
A comprehensive geospatial assessment of seagrass distribution in India
Gejo Anna Geevarghese., Akhil B., Magesh G., Krishnan P., Purvaja R., and Ramesh R. (2018)
Ocean and Coastal Management, vol. 159, pp. 16-25
2018