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

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

 Parameter

 Value

Ephemeroptera 10 individuals/m2
Plecoptera 10 individuals/m2
Trichoptera 12 individuals/m2
Coleoptera 329 individuals/m2
Diptera: Chironomidae 5707 individuals/m2
Other Diptera 0 individuals/m2
Megaloptera 0 individuals/m2
Crustacea 9 individuals/m2
Annelida 312 individuals/m2
Mollusca 0 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 E in Bear Creek Watershed.

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

 Parameter

 Value

pH 6
alkalinity 22 ppm
hardness 128 ppm
nitrates 37 mg N/L
nitrites 3.6 mg N/L
ammonia 7.2 mg N/L
total phosphorus 0.8 mg P/L
dissolved oxygen 1.5 ppm
fecal coliform 450 colonies/100 mL
conductivity 1.5 ohms

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

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

 Parameter

 Value

stream order (4)
catchment area 2300 km2
elevation 255 m
water temperature 22 C
air temperature 16.5 C
stream width 5.1 m
average depth 1.7 m
maximum depth 2.7 m
minimum velocity 0.2 m/s
average velocity 0.34 m/s
maximum velocity 0.54 m/s
forest canopy 70% shaded
average rock size 46 cm2
maximum rock size 138 cm2
turbidity 100 NTU (for 24 h)
total dissolved solids 2000 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 E.

 

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