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Table 2 Water quality of inflowing streams and lake surface (median, mg L-1; Chl.a, ug L-1, (25th–75th percentile))

From: The effect of phosphorus removal from sewage on the plankton community in a hypertrophic reservoir

  BOD COD SS TN TP Chl.a BOD/COD N/P (atomic) Chl.a/TP Number
Inflow St.1
(2008–2009)
4.6
(3.1–5.0)
6.4
(5.9–6.4)
45.7
(32.0–71.5)
3.73
(3.71–4.89)
0.190
(0.124–0.244)
  0.16
(0.09–0.23)
51
(38–54)
  10
Inflow St.2
(2008–2009)
2.7
(1.3–5.0)
6.4
(5.0–8.1)
11.9
(5.7–44.1)
3.76
(3.30–4.37)
0.131
(0.113–0.222)
  0.42
(0.23–0.79)
48
(38–68)
  10
STP effluent
(2003–2007)
10.4
(8.3–12.7)
14.9
(12.3–17.7)
12.5
(7.1–23.3)
7.9
(5.9–13.6)
0.633
(0.270–1.299)
  0.65
(0.50–0.77)
28
(21–44)
  24
STP effluent
(2008–2009)
1.6
(1.0–2.2)
6.8
(6.0–7.8)
1.9
(1.4–3.6)
10.6
(8.9–12.5)
0.310
(0.185–0.355)
  0.25
(0.15–0.32)
78
(61–88)
  29
Lake surface
(May 1999–Jun. 2007)
11.4
(8.7–13.7)
15.8
(13.2–18.4)
20.4
(16.0–30.7)
4.75
(3.47–5.87)
0.232
(0.181–0.284)
112.4
(53.9–163.7)
0.70
(0.51–0.87)
42
(27–70)
0.54
(0.22–0.84)
42
Lake surface
(Aug. 2007–Nov. 2009)
5.2
(4.1–7.1)
10.2
(8.7–11.3)
19.1
(13.9–30.8)
3.56
(2.31–4.93)
0.081
(0.054–0.137)
42.2
(24.9–110.8)
0.59
(0.47–0.69)
102
(68–154)
0.61
(0.28–1.15)
20