Aspenden Road Bridge (Site 14)

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Weather observations

• Current weather

  Community scientist interpretation

  • Sunny
  • Cloudy

• Rain in previous 24 hours

  Community scientist interpretation

  None

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Qualitative readings

• Colour

  Community scientist interpretation

  Colourless

• Clarity

  Community scientist interpretation

  Clear

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Plants/wildlife

• Aquatic vegetation

  Community scientist interpretation

  Submerged (fully under the water)	Absent
  Plants floating on the surface	Absent
  Plants emerging out of the water	Absent
  Algae (crusts or thin mats)	Less than 5%
  Algae (thick mats, can be free floating)	Absent

• Vegetation on shore or riverbank

  Community scientist interpretation

  No plants – bare soil, Short plants (grasses, flowers), Mature trees

• Problem plant species spotted during survey (UK)

  Community scientist interpretation

  None

• Wildlife spotted during survey (UK)

  Community scientist interpretation

  Butterflies

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Issue reporting

• Evidence of recent pollution

  Community scientist interpretation

  Litter

  Small amount

• Outfalls, pipes and drains

  Community scientist interpretation

  Outfall present – no flow

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Physical tests

• Water level

  Community scientist interpretation

  Average

• Water flow

  Community scientist interpretation

  Steady

• Natural obstacles to fish or flow

  Community scientist interpretation

  Debris dam - full width

• Channel bed materials

  Community scientist interpretation

  Cobble, Gravel - pebble, Sand

• Estimated width at water level

  Community scientist estimate (width)

  2 m

• Estimated average water depth

  Community scientist estimate (depth)

  0.08 m

• Turbidity

  Turbidity tube (50 cm)

  < 12 NTU

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Chemistry tests

• Water temperature

  Water Rangers pen-type meter (temperature)

  22.1 °C

• Conductivity

  Water Rangers pen-type meter (conductivity)

  1,257 μS/cm

• Phosphate

  Hanna checker (phosphate - low range)

  0.64 mg/L

• Nitrate-nitrogen

  WaterWorks Nitrate/Nitrite Test Strips (nitrate-nitrogen)

  ≥ 50 mg/L

• Nitrite-nitrogen

  WaterWorks Nitrate/Nitrite Test Strips (nitrite-nitrogen)

  0.15 mg/L

• Ammonia-nitrogen

  Simplex Health teststrip (ammonia-nitrogen - low range)

  0.5 mg/L