Kamal Nag
*
http://dx.doi.org/10.12944/CWE.16.3.24
Terrestrial sediment is a major source of sediment to all coasts. Suspended sediment is carried away by the rivers and supplied to the coast to maintain sediment budget. The construction of dams across the rivers arrest sediment behind it and affect the sediment budget of littoral cells along the coast. Reduction in sediment supply induces ecological as well as geomorphological changes along the shoreline. Coastal erosion may accelerate due to reduced sediment influx. With the growing number of cross-river dams and water diversion projects, it has become a major concern before the scientific community to measure, understand and find solutions to multi-fold geo-environmental problems that are arising out of river damming. The present study aims to find out the impact of dams on the coast. It examines how the changes in the suspended sediment supply of an Indian river impact the coast in terms of loss of area due to erosion. Temporal analysis of geomorphological changes along the shoreline in relation to sediment influx holds immense importance to coastal management essential for the sustainable life and livelihood of coastal communities. Scientific investigation into the impact of river dams on the coastal environment is likely to provide a strong ground to reconsider the way present basin development projects function. Areal changes in littoral sediment cells adjacent to the river mouth have been quantified and correlated with changes in sediment influx. Changes along the shorelines have been detected through multispectral satellite images of Landsat belonging to different dates. Image processing and quantification of changes have been performed in QGIS 3.14 “Pi” platform. Virtual raster, raster calculator, field calculator and other required tools in QGIS were used during image processing.
Landsat; Littoral Cell; QGIS; River Dam; Sediment Influx; Shoreline
Copy the following to cite this article:
Nag K. Impact of River Dams on Littoral Cells Located Adjacent to the River Mouth. Curr World Environ 2021;16(3).
DOI:http://dx.doi.org/10.12944/CWE.16.3.24
Copy the following to cite this URL:
Nag K. Impact of River Dams on Littoral Cells Located Adjacent to the River Mouth. Curr World Environ 2021;16(3). Available From:
