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Bear Creek Watershed: Site G Data
Below are three tables that contain data collected at Site G in Bear Creek Watershed.

Table 1. Biological data collected at Site G in Bear Creek Watershed.

 Parameter

 Value

Ephemeroptera headers="value"98 individuals/m2
Plecoptera 39 individuals/m2
Trichoptera 87 individuals/m2
Coleoptera 657 individuals/m2
Diptera: Chironomidae 6220 individuals/m2
Other Diptera 603 individuals/m2
Megaloptera 9 individuals/m2
Crustacea 159 individuals/m2
Annelida 581 individuals/m2
Mollusca 11 individuals/m2

For an explanation of these parameters and the calculations that can be performed on these data, see the "Biological Assessment" section of the "Water Quality" puzzle piece. Using the data in Table 1 above, calculate the total number of organisms, EPT Index, and species diversity at Site G in Bear Creek Watershed.

Table 2. Chemical data collected at Site G in Bear Creek Watershed.

 Parameter

 Value

pH 7.1
alkalinity 26 ppm
hardness 86 ppm
nitrates 40 mg N/L
nitrites 4 mg N/L
ammonia 8 mg N/L
total phosphorus 1 mg P/L
dissolved oxygen 1.5 ppm
fecal coliform 500 colonies/100 mL
conductivity 0.5 µohms

For an explanation of these parameters, see the "Chemical Assessment" section of the "Water Quality" puzzle piece.

Table 3. Physical data collected at Site G in Bear Creek Watershed.

 Parameter

 Value

stream order (3)
catchment area 1000 km2
elevation 264 m
water temperature 22 °C
air temperature 6.5 °C
stream width 2.3 m
average depth 0.8 m
maximum depth 1.3 m
minimum velocity 0.2 m/s
average velocity 0.33 m/s
maximum velocity 0.53 m/s
forest canopy 70% shaded
average rock size 45 cm2
maximum rock size 135 cm2
turbidity 150 NTU (for 24 h)
total dissolved solids 1600 mg/L

For an explanation of these parameters, see the "Physical Assessment" section of the "Water Quality" puzzle piece. Examine the map of Bear Creek Watershed and determine stream order at Site G.

 

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