For the first time, this study estimates the interannual and monthly variabilities of nutrient fluxes (nitrate – NO3−) and total phosphorus – TP) in the lower Mekong River and Tonle Sap River in Cambodia, and assesses the nutrient linkage between the them. The results of the nutrient exchange budget indicated that the NO3− and TP fluxes from the Mekong River into Tonle Sap Lake were ~ 35.8 ± 12.5 kt/y and ~ 8.7 ± 3.3 kt/y, respectively, while these were 34.0 ± 13.8 kt/y and 6.6 ± 1.4 kt/y, respectively, from Tonle Sap Lake into the Mekong system. The results demonstrate that the Mekong River is a vital nutrient source, especially during the flood season, to Tonle Sap Lake and its floodplain.
Sok, T., C. Oeurng, V. Kaing, S. Sauvage, X. Lu, and J.M. Sánchez Pérez
01 March 2022
nutrient transport, Mekong River, Tonle Sap Lake