eng Science and Education Publishing American Journal of Water Resources 2333-4819 2020-04-22 8 2 92 107 10.12691/ajwr-8-2-5 AJWR2020825 article Tran Thi Hong Ngoc tthngocagu@gmail.com 1 Vo Khac Tri 2 Faculty of Engineering-Technology-Environment, An Giang University - Vietnam National University, Ho Chi Minh City, Vietnam. No 18 Ung Van Khiem Street, Dong Xuyen Ward, Long Xuyen City, An Giang Province, Vietnam The Southern Institute of Water Resources Research, 658 Vo Van Kiet Street, Ward 1, District 5, Ho Chi Minh City, Vietnam This paper presents the result of suspended and deposited sediment measurements on the floodplain of Long Xuyen Quadrangle-An Giang (LXQ-AG) along the Cambodia - Vietnam border during a flood event in 2018. GIS and Remote sensing techniques were used to build maps for the flooded areas. Water level and discharge were also measured on main channels and on the floodplain. The two correlation equations between deposition sediment, Suspended Sediment concentration (SSC) and discharge were build. The results of Landsat interpretting showed that inundation area of the floodplain was 35,765 ha. SSC and deposited sediment decreased with distance from the main channels. The results showed thattotal deposited sediment mass brought to the floodplain during a single flood event in 2018 was 5.023 million tons (14.04 kg/m2). http://pubs.sciepub.com/ajwr/8/2/5/ajwr-8-2-5.pdf GIS remote sensing ?oodplain deposited sediment suspended sediment Long Xuyen Quadrangle