Indian Brook - Tier 3 Report - 10/05/21

Physical Parameters Assessment

Investigator Name(s):

Ella, Courtney, Stephanie, Addie

Collection Date & Time:

Tuesday, October 5, 2021 - 12:00pm

School:

Colchester High School

River:

Indian Brook

Monitoring Site:

Mill Pond

Water Appearance:

Cloudy

Green

Tea-colored

Average Embeddedness:

51-75%

Average Velocity:

14.33m/s

Average Transparency/Turbidity

No Impact: >60 cm - 17cm = 0-50 ntu
Possible Impact: 17 - 8cm = 65-150 ntu
Impacted: 8 - < 6 cm = >150 ntu

Height of Water Column:

74.00cm

Turbidity:

40.00NTU

Chemical Assessment

Introduction:

Materials and Methods:

Results:

Discussion:

Stream Habitat Assessment

Good Habitat: Score of 80 to 60 ----- Fair Habitat: Score of 59 to 40 ----- Poor Habitat: Score of 39 to 0

Substrate Habitat Types (Score):

40 to 70% has mix of stable habitat types (6)

Embeddedness:

0 to 25% embedded; rocks easy to move (8)

Sediment Deposition:

5 to 30% of riverbed effected by new deposition (6)

Velocity / Depth Types (Score):

All four velocity/depth types present (8)

Channel Flow Status:

Water fills > 75% of channel; < 25% of substrate exposed (6)

Channel Alteration:

Some alteration present; usually near bridges (3)

Frequency of Riffles:

Occurrence of riffles very frequent (4)

Bank Stability (Left Bank):

Stable; < 5% eroded or collapsed (4)

Bank Stability (Right Bank):

Stable; < 5% eroded or collapsed (4)

Riparian Vegetation (Left Bank):

< 50% covered by natural vegetation (1)

Riparian Vegetation (Right Bank):

> 90% covered by natural vegetation (4)

Riparian Zone Width (Left Bank):

Width < 6 meters; little or no riparian vegetation (1)

Riparian Zone Width (Right Bank):

Width > 18 meters; no human impact (4)

Stream Habitat Quality Score

Calculated by adding all of the points from the above fields.

60-80 (Good)
40-59 (Fair)
0-39 (Poor)

Stream Habitat Quality Score for This Report:

Biological Assessment

The Water Quality Score is calculated by adding together the the Index Values calculated for each Sensitivity Group on the field sheet.

40+ (Excellent)
30-39 (Good)
20-29 (Fair)
0-19 (Poor)

Group I (Sensitive) Index Value:

10.0

Group II (Moderately Sensitive) Index Value:

16.2

Group III (Tolerant) Index Value:

0.0

Water Quality Score for This Report: