The study Environmental status-quo assessment in Cai Son channel, Ba Bau channel and Ong Manh channel" was conducted to evaluate the level of pollution through the measurement of physical, biological criteria and heavy metal in water and sediment in Cai Son channel, Ba Bau channel and Ong Manh channel. The analysis of 6 water and 6 sediment samples in 3 channels shows the parameters such as dissolved oxygen in water (DO), total suspended solids content (TSS), biological oxygen demand (BOD5), Chemical oxygen demand (COD), Ammonium, Phosphate, Coliform contents all exceed the permissible limits of QCVN 08-MT:2015/BTNMT - National technical regulation on surface water quality. The parameters of Nitrate, Vegetable oil and fat content are still within the allowed limits of the regulation. The contents of nutrients, nitrogen, and phosphorus are high. No heavy metals such as Pb, Cr, Cu are detected in all water samples, Cd is detected at 0.001 mg/l in Cai Son channel, within the permissible limits of QCVN 14:2008/BTNMT - National technical regulation on domestic wastewater. The content of As, Cd, Cr in the sediment is within the permissible limits for all type of soil according to QCVN 03:2017/BTNMT - National technical regulation on the allowable limits of heavy metals in the soils. The level WQI is at the level of serious pollution. The samples of sediment, heavy metals such as Cr, Cd, As, Fe are within the permissible limits of QCVN 43:2017/BTNMT - National technical regulation on sediment quality. Hg is not detected. The contents of Al, Mg are quite high. Sediment is rich in organic matter, high in nitrogen and phosphorus

Keywords: Remote sensing; floodplain; deposited sediment; An Giang