remote sensing Article Coastal Erosion and Human Perceptions of Revetment Protection in the Lower Meghna Estuary of Bangladesh Thomas W. Crawford 1,*, Md Sariful Islam 1 , Munshi Khaledur Rahman 2 , Bimal Kanti Paul 3, Scott Curtis 4 , Md. Giashuddin Miah 5 and Md. Rafiqul Islam 6 1 Department of Geography, Virginia Tech, Blacksburg, VA 24061, USA;
[email protected] 2 Department of Geology and Geography, Georgia Southern University, Statesboro, GA 30458, USA;
[email protected] 3 Department of Geography and Geospatial Sciences, Kansas State University, Manhattan, KS 66506, USA;
[email protected] 4 Lt Col James B. Near, Jr., USAF, ’77 Center for Climate Studies, Department of Physics, The Citadel, Charleston, SC 29409, USA;
[email protected] 5 Vice-Chancellor, Bangabandhu Sheikh Mujibur Rahman Agricultural University, Gazipur 1706, Bangladesh;
[email protected] 6 Department of Agronomy, Bangabandhu Sheikh Mujibur Rahman Agricultural University, Gazipur 1706, Bangladesh; rafi
[email protected] * Correspondence:
[email protected]; Tel.: +1-540-231-7216 Received: 21 July 2020; Accepted: 17 September 2020; Published: 22 September 2020 Abstract: This study investigates coastal erosion, revetment as a shoreline protection strategy, and human perceptions of revetments in the Lower Meghna estuary of the Bangladesh where new revetments were recently constructed. Questions addressed were: (1) How do rates of shoreline change vary over the period 2011–2019? (2) Did new revetments effectively halt erosion and what were the magnitudes of erosion change? (3) How have erosion rates changed for shorelines within 1 km of revetments, and (4) How do households perceive revetments? High-resolution Planet Lab imagery was used to quantify shoreline change rates.