Fig. 2: Spatial and temporal distribution of P concentrations in different forms in the Yellow River.

(a) TP in the rainy season; (b) TDP in rainy season; (c) DRP in rainy season; (d) TP in dry season; (e) TDP in dry season; (f) DRP in dry season. “TP”, “TDP” and “DRP” mean total phosphorus, total dissolved phosphorus and dissolved reactive phosphorus. There is no data for QH1-15 in dry season, which is represented in black.