Overall level of expression of Eutrophic condition

1             High primary symptoms           0,6             Moderate primary symptoms           0,3             Low primary symptoms           0   0,3   0,6   1     Low secondary symptoms   Moderate secondary symptoms   High secondary symptoms

  Primary symptoms 

Zone Area(km2) (Az) Value(Vij) Az/At x Vij Chlorophyll a Macroalgal growth Chlorophyll a Macroalgal growth Mixing 37.43 1.000 0.000 0.047 0.000 Mixing 1.18 1.000 0.000 0.001 0.000 Mixing 328.95 1.000 0.000 0.412 0.000 Mixing 43.92 0.250 0.000 0.014 0.000 Seawater 19.81 1.000 1.000 0.025 0.025 Seawater 258.25 1.000 0.000 0.323 0.000 Tidal freshwater 109.5 0.500 0.000 0.069 0.000 Sum At = 799.04 km2 - - 0.890 0.025 Primary symptoms level of expression value for the estuary: 0.46 Moderate

  Secondary symptoms

Zone Area(km2) (Az) Value(Vij) Az/At x Vij Dissolved oxygen Nuisance algal blooms Toxic algal blooms Dissolved oxygen Nuisance algal blooms Toxic algal blooms Mixing 37.43 0.500 1.000 0.000 0.023 0.047 0.000 Mixing 1.18 0.500 1.000 0.000 0.001 0.001 0.000 Mixing 328.95 0.500 1.000 0.000 0.206 0.412 0.000 Mixing 43.92 0.500 1.000 0.000 0.027 0.055 0.000 Seawater 19.81 0.250 1.000 0.000 0.006 0.025 0.000 Seawater 258.25 0.250 1.000 0.000 0.081 0.323 0.000 Tidal freshwater 109.5 0.000 0.000 0.000 0.000 0.000 0.000 Sum At = 799.04 km2 - - - 0.344 0.863 0.000 Secondary symptoms level of expression value for the estuary: 0.86 High

  Synthesis

Indices Methods Parameters/ Values / EAR Index category Overall Eutrophic Condition (OEC) PSM Chlorophyll a 0.890 0.46 Moderate High Macroalgal growth 0.025 SSM Dissolved oxygen 0.344 0.86 High Nuisance algal blooms 0.863 Toxic algal blooms 0.000