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Delineating saltwater intrusion zones and assessing its relation with mangrove species along the coastal tracts of Raigad district of Maharashtra, India
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Delineating saltwater intrusion zones and assessing its relation with mangrove species along the coastal tracts of Raigad district of Maharashtra, India
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Journal Article
Delineating saltwater intrusion zones and assessing its relation with mangrove species along the coastal tracts of Raigad district of Maharashtra, India
2022
Overview
Abstract Climate change and anthropogenic pressure stress groundwater resources and facilitate saltwater intrusion. Raigad, a coastal district on the west side of Maharashtra, is susceptible to the problem of saltwater intrusion. Over the region, varied growth rate with increasing as well as stagnant growth trend of mangrove has been observed. The present study attempts to analyze the scenario of saltwater intrusion vulnerability and its relation to mangrove growth during the past two decades. The GALDIT model has been employed for saltwater intrusion vulnerability assessment. It is an indicator-based model that depends on the hydrogeological parameters of a region. The GALDIT scores have been calculated for the years 2000 and 2019. It has been observed that GALDIT scores have increased from moderately vulnerable to highly vulnerable. The results reveal four distinct saline hotspots in the study area. Salinity has explicitly increased over Shivardhan, Murud, Alibag, and Uran. Representative mangrove patches show that spatial growth of mangrove species depends on the area's salinity, with Avicennia marina being the most salt tolerant and Excoecaria agallocha being the least salt tolerant. The present work will help in decision-making for plantation and conservation programs of mangrove forests.
