The anthropogenic influence on the estuarine system of Gosaba Island, Sundarban, India

Autor: Biswaranjan Mistri, Soumen Ghosh
Rok vydání: 2021
Předmět:
Zdroj: Arabian Journal of Geosciences. 14
ISSN: 1866-7538
1866-7511
Popis: The spatial pattern and morphological characteristics of creek channels have been altered due to anthropogenic interferences such as the construction of embankment, erection of closures and unsystematic human encroachment on drainage channels of Gosaba Island. The saucer-like appearance of the island and the deterioration of drainage channels have adverse impacts on the estuarine environment. To address these issues, this study highlights the spatial pattern and morphological change of drainage channels and illustrates their negative impacts on Gosaba Island. In this study, US Army Toposheet of 1955, multi-temporal Landsat data from 1972 to 2017, ALOS-PALSAR DEM, high-resolution Google Earth images, and cadastral maps were incorporated in remote sensing and GIS environment to assess the drainage density, morphological characteristics of creeks, spatial risk of flood inundation, and proximity analysis of households along the drainage channels. Furthermore, the direction of surface slopes was measured by instrumental surveying, as well as collecting a variety of information about drainage congestion and the resulting problems during field surveys. The study revealed that channel decay, the morphological changes in creek characteristics, and embedded drainage systems are increasing the risk of flood inundation and waterlogging problems in the agricultural field, especially in times of natural calamity. For the future sustainability of Gosaba, the government must take control over the imprudent human interventions on the drainage system.
Databáze: OpenAIRE
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