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Table 1 Water quality and nutrient levels in a multiple-reservoir water recycling system at the time of sampling

From: Seasonal dynamics of cyanobacteria and eukaryotic phytoplankton in a multiple-reservoir recycling irrigation system

Season (date) Reservoiry Water qualityz Nutrient level
Chla (μg/L) DO (mg/L) EC (μS/cm) pH Temp (°C) Turb (NTU) NH4 NO3 NO2 PO4
(mg/L)
Springx (4/11/12) VA10 0.55 8.58 243.00 5.40 12.28 3.90 0.29 7.42 0.09 < 0.01
VA11 24.30 9.07 437.33 6.32 16.42 52.10 5.18 12.07 0.09 1.76
VA12 32.90 9.49 252.00 6.65 18.08 7.7 2.54 5.17 0.09 0.69
VA13 2.5 9.85 192.93 7.46 17.60 45.3 0.29 0.46 0.09 0.01
Summer (7/16/12) VA10 0.70 6.79 241.67 5.87 20.75 3.60 0.29 25.78 0.11 0.09
VA11 23.60 6.20 741.33 6.12 28.95 17.00 0.65 165.52 0.81 18.92
VA12 31.40 10.40 328.33 7.75 29.85 2.17 0.48 50.31 1.79 6.56
VA13 3.71 10.39 311.00 10.3 29.66 17.02 0.29 0.15 0.09 0.09
Fall (10/1/12) VA10 0 8.11 244.00 6.02 17.32 2.60 0.29 39.42 0.09 0.09
VA11 26.73 5.83 343.67 6.65 19.92 6.20 1.16 86.82 1.72 15.64
VA12 51.07 7.38 230.00 7.22 22.35 14.57 0.29 41.8 0.66 8.14
VA13 24.87 7.06 181.33 9.42 21.63 76.07 0.29 0.09 0.09 0.09
Winter (1/22/13) VA10 1.33 9.75 236.00 5.57 8.39 1.27 0.09 21.94 0.16 0.09
VA11 11.60 11.88 71.00 6.23 6.59 37.17 0.45 6.81 0.19 2.25
VA12 13.60 11.4 79.67 6.79 7.47 33.30 0.21 4.01 0.28 2.52
VA13 45.03 8.93 240.00 5.79 12.86 6.13 0.09 2.42 0.09 0.09
  1. xData has been published (Kong et al. 2017)
  2. yRunoff from production areas was channeled into VA11 which overflowed into VA12 then to VA13. VA10 was an independent small stream
  3. zWater quality reading at the time of sampling: Chla chlorophyll a, DO dissolved oxygen, EC electrical conductivity, Temp temperature, Turb turbidity