Upper KlamathLake Drainage

North Fork Sprague River

Upper Klamath Lake Drainage LandCover Assessment

Methodology

Slide 1-15

Land Cover Assessment MethodologyStep 1. Land cover polygons and stream polylines are digitized from 1998 color aerialphotos. All digitized polygons are drawn to capture visually like land cover features. Alldigitized line work is completed at 1:5,000 or less.Step 2. Basic land cover types are developed and assigned to individual polygons. Theland cover types used in this effort are aggregate land cover groups, such as: conifers,hardwoods, shrubs, etc.Step 3. Through simple assumptions regarding land cover succession and by examiningland cover types adjacent to major anthropogenic disturbance areas (i.e. clearcuts, roads,cultivated fields, etc.), it is possible to develop a rule set that can be used to estimatepotential land cover conditions. For example, small conifers are assumed to have thepotential to become large conifers. A high and low range is developed in areas whereuncertainty remains about land cover succession or the potential for recovery.Step 4. Automated sampling is conducted on classified land cover spatial data sets in 2-dimensions. Every 100 feet along the stream (i.e. in the longitudinal direction), bothstream banks are sampled every 15 feet, starting at the channel edge, out to 135 feet.This sampling rate results in 950 measurements of land cover per every mile of stream.Step 5. Ground level land cover data is statistically summarized and sorted by land covertype. Median values for land cover height and density can then be used to describe landcover classifications.Step 6. Land cover physical attributes can then be described in 2-dimensions sinceautomated sampling occurs in both the longitudinal and transverse directions.

Slide 2-15

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Step 1Digitize Land

CoverPolygons

and StreamPolyline at

1:5,000

Slide 3-15

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Pasture/Cultivated FieldRoadLarge MixSmall MixLarge HardwoodSmall HardwoodLarge ConiferSmall ConiferShrubs - UplandShrubs - WetlandGrasses - UplandGrasses - WetlandWaterDeveloped - Residential;25% Distribution of Shrubs75% Distribution of Shrubs

Step 2Classify Land

Cover

Land Cover Types

Slide 4-15

Potential ConditionHigh Range

Potential ConditionLow Range

Step 3Develop Potential Land Cover Condition

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Slide 5-15

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Step 4Sample Land Cover

Data Sets Red dots are stream datanodes placed at

100 foot intervals in thelongitudinal direction

Green dots representtransverse sample points for

land cover that occur atstream data nodes

Slide 6-15

Gram

inoid&

Forb

Wetland

Shrub

Dryland

Shrub

Conifers

Deciduous

Western

Juniper

Land

Cov

er H

eigh

t (fe

et)

Step 5Assign Physical Attributes to Classifications

Ground level landcover data isstatistically

summarized andsorted by

vegetation type.Median valuesallow a general

description basedon site specific

data collected inthe study area.

Vegetation heightis used here as an

example.

Slide 7-15

Using the medianvalues for each landcover type, vegetationheight can be assigned tosampled land cover data sets.The derived data is 2-dimensional sincesampling occurs in the longitudinal and transverse directions.

34.232.3

30.529.0

27.626.1

24.322.6

20.919.0

17.215.6

14.411.7

10.28.6

7.05.4

3.51.6

120'

15'

60'

0

10

20

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50

60

70

80

Step 62-Dimensional Analysis of Land Cover Attributes

Cur

rent

Con

ditio

n Ve

geta

tion

Heig

ht (f

t)

River Miles

Distan

ce fr

om

Chann

el Edg

e(ft

)

Example - North Fork Sprague Vegetation Height

120’

120 ’

0’ 0’

Slide 8-15

Upper Klamath Lake Drainage LandCover Assessment

Results

South Fork Sprague RiverSlide 9-15

Fish

hole

Cre

ek

Trou

t Cre

ek

Slide 10-15

N.F

. Spr

ague

Riv

er

S.F.

Spr

ague

Riv

er

Slide 11-15

Syca

n R

iver

- U

pper

Syca

n R

iver

- Lo

wer

Slide 12-15

Spra

gue

Riv

er -

Upp

er

Spra

gue

Riv

er -

Mid

dle

Slide 13-15

Spra

gue

Riv

er -

Low

er

Slide 14-15

Will

iam

son

Riv

er -

Upp

er

Will

iam

son

Riv

er -

Low

er

Slide 15-15