Physicochemical Characteristics of River Water Downstream of a Large Tropical Hydroelectric Dam

Figure 2

In situ and ex situ water quality parameters of (a) pH, (b) DO, (c), turbidity, (d) TS, (e) BOD₅, (f) COD, (g), TAN, and (h) TP at stations of downstream Bakun hydroelectric dam when the spillway was closed (dash line) and when it is opened (solid line) when the dam is in operation. Different letters indicate significant difference at value ≤ 0.05 along the downstream river (uppercase—spillway closed; lowercase—spillway opened).

(a)

(b)

(c)

(d)

(e)

(f)

(g)

(h)