Effects of cascade dams on phosphorus bioavailability in surface sediments:A comparative study between the Nu River and the Upper Mekong River

The dataset include sediments phosphorus concentrations in the Nu River and the Lancang River for January 2018. Seven different phosphorus fractions in sediment samples were extracted, including  total inorganic phosphorus (TIP), exchangeable phosphorus (Ex-P), aluminum-bound phosphorus (Al-P), iron-bound phosphorus (Fe-P), Calcium-bound phosphorus (Ca-P),  residual phosphorus (Res-P) and organic phosphorus (Org-P) (sheet 1). Sediments particle size, mineral composition and environmental factors (ORP, DO, TOC, TP, Temp, pH, etc.) also were measured at the sampling sites (sheet 2,3,4).