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ThiefWatershed

CleanWaterWork

Geomorphicassessmentofstreamsandchannelsthroughoutthewatershed

Channelstability

and

bank

erosion

Sourcesofsediment streamchanneloroutsidesource

Linksto

impairments

and

suggestions

for

improvements

DaveFriedl,JasonVinje,MinnesotaDNR

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RiverStabilityTheabilityofastreamtotransportthesediment

and

flows

produced

by

its

watershed,whilemaintainingaconsistentdimension,pattern,andprofilewithoutaggradingordegrading(DaveRosgen,1996).

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Dimension

Pattern

Profile

(Topview)

(CrossSection)

WaterSurfaceStreamBedThalweg

Bankfull

LongitudinalProfile

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ENERGY PATHWAYS / CONNECTI VI TY

Month

0

50

100

150

200

250

300

FLOW(cfs)

J F M A M J J A S O N D

HYDROLOGY

GEOMORPHOLOGY

BIOLOGY

COMPONENTS OF RIVER SYSTEMS

WATER QUALIT Y

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Variable C G G F F CInstreamCover

OverheadCover

SubstrateComposition PoolQuality

HoldingCoverVelocity

Temperature DissolvedOxygen

MacroInvertebrates

SpawningHabitat

Diversity

RearingHabitat

IBIScore

SedimentSupply

BankErosion

AquaticHabitatResponse

StreamTypeSuccession

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IndicesofChannelStability BHR Incision

Entrenchment

Vegetation

Depositionalpatterns Channelsuccession Dimension

Pattern

Profile

Aggradation

Degradation

Competence

Capacity

BankErosionRates

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Root

Depth

RootDensity

StudyBankHeight

BankfullHeight

45Surface

Protection

VeryHighBankErosionHazardIndex

BankMaterial

and

StratificationAdjustments

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BankAngle55

BankfullHeight

StudyBank

Height

RootDepth

SurfaceProtection

80%

ModerateBEHI

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LowBEHI,StudyBankSite

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Virtuallynochangeintheriffleareaorelevation2011to2012hydrauliccontrolremainsthesame.

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Toepin

Studybanklocation

Crosssectionbankpin

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Workthat

will

continue

Assesschannelsedimentsourcesandstream

stability

Identifyandprioritizeproblemareastorestore

orapply

BMPs

Prioritizeandprotectatrisknonproblemareas

Identifybest

places

and

ways

to

use

CWL

funds

DaveFriedlMNDNR

218.846.8385

david.friedl@state.mn.us

Protect the best and

restore the rest.-Rosgen