Raw Biological Data for the RAPIDAN RIVER at Route 671 (M-16)

Cycle

Avg. Width (ft)

Avg. Depth (in)

Flow Rate

Temp (°F)

Collection Time (sec)

Worms

Flatworms

Leeches

Crayfishes

Sowbugs

Scuds

Stoneflies

Mayflies

Dragonflies Damselflies

Hellgrammites Fishflies Alderflies

Net-spinning Caddisflies

Most Caddisflies

Beetles

Midges

Black Flies

Most True Flies

Gilled Snails

Lunged Snails

Clams

Other

Total

Index Value

Summer 01

50

5

normal

83

20

5

0

0

0

2

0

29

30

2

0

30

0

12

4

51

0

1

0

3

0

288

10

Fall 01

25

8

low

58

55

16

0

0

0

1

0

23

31

0

3

62

27

12

24

4

0

5

0

0

0

208

9

Winter 02

25

10

normal

43

75

1

0

0

0

0

0

23

60

0

10

61

44

6

13

0

9

3

0

0

0

230

9

Spring 02

25

12

normal

77

50

111

0

0

0

0

0

11

24

2

0

41

0

5

0

20

0

0

6

0

0

220

2

Summer 02

20

4

no flow

 

Fall 02

25

6

low

69

75

21

10

0

0

0

0

17

33

11

4

10

4

26

4

0

1

48

1

10

1

201

8

Winter 03 25 6 high 36 70 0 0 0 0 0 0 9 87 12 2 69 38 23 2 3 4 7 0 3 0 259 11
Fall 07 25 8 low 73.4 40 36 0 0 0 0 0 25 38 0 0 10 17 50 0 78 0 81 0 2 0 337 9
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