Mapping the water body area by using Sentinel 1 – SAR in dry season of 2023: A case study in Tri An reservoirHa Phuong Tran, Tuan Cuong Ha, Thi Thuy Huong Nguyen, Ngoc Thy Nguyen, Ba Man Duong, Mon Danh, Phuc Dang Tran and Tuan Nhi PhamE3S Web Conf., 496 (2024) 03001DOI: https://doi.org/10.1051/e3sconf/202449603001