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

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

 Parameter

 Value

Ephemeroptera 1571 individuals/m2
Plecoptera 624 individuals/m2
Trichoptera 1391 individuals/m2
Coleoptera 808 individuals/m2
Diptera: Chironomidae 2385 individuals/m2
Other Diptera 157 individuals/m2
Megaloptera 11 individuals/m2
Crustacea 527 individuals/m2
Annelida 387 individuals/m2
Mollusca 549 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 C in Bear Creek Watershed.

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

 Parameter

 Value

pH 7.2
alkalinity 25.8 ppm
hardness 85.7 ppm
nitrates 7.0 mg N/L
nitrites 0.5 mg N/L
ammonia 0.3 mg N/L
total phosphorus 0.06 mg P/L
dissolved oxygen 9 ppm
fecal coliform 48 colonies/100 mL
conductivity 0.4 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 C in Bear Creek Watershed.

 Parameter

 Value

stream order (3)
catchment area 940 km2
elevation 263 m
water temperature 15 °C
air temperature 16 °C
stream width 2.7 m
average depth 0.9 m
maximum depth 1.4 m
minimum velocity 0.19 m/s
average velocity 0.3 m/s
maximum velocity 0.5 m/s
forest canopy 80% shaded
average rock size 49 cm2
maximum rock size 147 cm2
turbidity 2 NTU (for 24 h)
total dissolved solids 220 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 C.

 

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