Comparative Analysis of Comparative Analysis of Munroe Brook and Munroe Brook and

Headwaters of the LaPlatte Headwaters of the LaPlatte RiverRiver

Group A4Group A4

Lindsay Harrington, Maury Lindsay Harrington, Maury LynchLynch

Jared Nunery, Chris VanceJared Nunery, Chris Vance

MethodsMethods

Stream Geomorphic Assessment Stream Geomorphic Assessment Protocols Protocols

Phase 1 Phase 1 – Fully completedFully completed

Phase 2 Phase 2 – Rapid Habitat Assessment (RHA)Rapid Habitat Assessment (RHA)– Rapid Geomorphic Assessment Rapid Geomorphic Assessment

(RGA)(RGA)

LaPlattLaPlatte Rivere River

M18

M20

M21

MunroMunroe e BrookBrook

M2

M4

M5

Reach Comparisons -Reach Comparisons -LaPlatte M18 to Munroe LaPlatte M18 to Munroe

M2 M2

Parking Lot at bottom of M18

Runoff from Route 7 into M2

LaPlatte M18 Munroe M2

Reach Comparisons -Reach Comparisons -LaPlatte M18 to Munroe LaPlatte M18 to Munroe

M2 M2 LaPlatte M18 Munroe M2

Woody Debris and large Buffer Zone

Lack of Woody Debris in majority of M2

Reach Comparisons -Reach Comparisons -LaPlatte M20 to Munroe LaPlatte M20 to Munroe

M5 M5 LaPlatte M20 Munroe M5

Golf Course within Reach Watershed

Reach Within Golf Course – Directly impacting Stream

Reach Comparisons -Reach Comparisons -LaPlatte M20 to Munroe LaPlatte M20 to Munroe

M5 M5 LaPlatte M20 Munroe M5

Vegetated Banks and Thin Buffer

Upstream buffered area

Reach Comparisons -Reach Comparisons -LaPlatte M21 to Munroe LaPlatte M21 to Munroe

M4 M4

LaPlatte M21

Munroe M4

Reach Comparisons -Reach Comparisons -LaPlatte M21 to Munroe LaPlatte M21 to Munroe

M4 M4 LaPlatte M21 Munroe M4

Sandy Silt and gravel within the reach

Clay with some cobble and gravel in upper part

of the reach

Phase 1 - ResultsPhase 1 - Results

Stream Reach Condition Score

0

0.2

0.4

0.6

0.8

1

ATT 1-M18 ATT 2-M20 ATT 3-M21 IMP 1-M2 IMP 2-M4 IMP 3-M5

Phase 1 - ResultsPhase 1 - Results

Average Stream Condition Indices for Impaired vs. Attainment Streams

0

0.1

0.2

0.3

0.4

0.5

0.6

0.7

0.8

0.9

ATT- LaPlatte IMP- Munroe

Str

ea

m C

on

dit

ion

Ind

ex

Phase 2 - ResultsPhase 2 - Results

Habitat and Geomorphic Assessment Scores for Attainment and Impaired Streams

0

0.1

0.2

0.3

0.4

0.5

0.6

0.7

0.8

RHA RGA

Rep

ort

Sco

re

ATT

IMP

Phase 2 - ResultsPhase 2 - Results

Habitat vs. Geomorphic Scores

y = 0.7542x + 0.1076R2 = 0.6966

0.000.100.200.300.400.500.600.700.800.90

0.00 0.20 0.40 0.60 0.80 1.00

RGA

RH

A

Phase 1 Phase 2 Phase 1 Phase 2 ComparisonComparison

RGA vs. Condition Index

y = 0.2631x + 0.4935R2 = 0.1902

0.00

0.10

0.20

0.30

0.40

0.50

0.60

0.70

0.80

0.90

0.00 0.20 0.40 0.60 0.80 1.00

Condition Index

RG

A

Phase 1 Phase 2 Phase 1 Phase 2 ComparisonComparison

Condition Index vs. RGA Score for the LaPlatte River (ATT)

y = 0.4233x + 0.3897R2 = 0.2419

0.00

0.10

0.20

0.30

0.40

0.50

0.60

0.70

0.80

0.90

0.00 0.20 0.40 0.60 0.80 1.00

CI

RG

A

Condition Index vs. RGA Score for Munroe Brook (IMP)

y = -0.1401x + 0.6034R2 = 0.019

0.000.10

0.200.30

0.400.50

0.600.70

0.80

0.00 0.10 0.20 0.30 0.40 0.50 0.60

CI

RG

A

Phase 1 Phase 2Phase 1 Phase 2Total ComparisonTotal ComparisonRHA vs. Condition Index averaged for all six reaches

y = 0.4132x + 0.3579R2 = 0.5742

0.000.100.200.300.400.500.600.700.800.90

0.00 0.20 0.40 0.60 0.80 1.00

Condition Index

RH

A

Adjustment ProcessesAdjustment Processes

0

1

2

3

4

5

6

7

8

9

Report Score

Deg Agg Wide Plan

Process

Relative Impact of Adjustment Processes

ATT

IMP

AcknowledgmentsAcknowledgments

Breck BowdenBreck Bowden Bill GillBill Gill Mike Snyder Mike Snyder