Geoplanning : Journal of Geomatics and Planning
Vol 13, No 1 (2026)

Appraising Land Use Dynamics and Dam Feasibility in Ratargul Swamp Forest, Bangladesh via Sentinel-2 Data

Imran Ahmed (Department of Forestry and Environmental Science, Shahjalal University of Science and Technology, Sylhet-3114, Bangladesh)
Kazi Mohammad Masum (Department of Forestry and Environmental Science, Shahjalal University of Science and Technology, Sylhet-3114, Bangladesh)



Article Info

Publish Date
25 Jun 2026

Abstract

Ratargul Swamp Forest (RSF), the only freshwater swamp ecosystem in Bangladesh, is well-known for its rich biodiversity and unique wetland features that attract significant tourist traffic. However, dry season water scarcity restricts tourism, reducing local income and driving communities to illegally harvest resources, which accelerates forest degradation. This study aims to analyze land use and land cover (LULC) changes in the RSF from 2016 to 2024 and evaluate the feasibility of placing a dam to regulate dry-season water flow. Sentinel-2A satellite imagery was utilized to assess long-term LULC dynamics. Additionally, a Digital Elevation Model (DEM) was applied to identify optimal dam locations along the Chengir Khal to control water flow during the dry season. LULC analysis revealed that forest vegetation decreased at an annual rate of 1.23% while bare land expanded by 1.04% annually.  Thus, highlight an urgent need for emergency conservation efforts in this special biodiversity area. The current dry season watershed area spans 80 hectares. DEM identified potential dam location to control water flow during the dry season. Establishing a dam at Chengir Khal is projected to increase the dry season water area to 121 hectares, without subverting or damaging existing forest plant habitats. Constructing a dam at Chengir Khal offers a sustainable solution to mitigate dry season water scarcity. By maintaining water levels, the dam will enhance the travel activity, secure local livelihoods, eliminate resource-dependence degradation, and promote long-term forest conservation.

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Journal Info

Abbrev

geoplanning

Publisher

Subject

Earth & Planetary Sciences

Description

Geoplanning, Journal of Geomatics and Planning (E-ISSN: 2355-6544), is an open access journal (e-journal) focusing on the scientific works in the field of applied geomatics technologies for urban and regional planning including GIS, Remote Sensing and Satellite Image Processing. This journal is ...