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Methow River
Okan ogan Riv er
Sanpoil River
Colvil le River
Twi s p River
Chew
ack R
iver
Kettle RiverLo
st R
iver
Ste hekin River
Fraser River
F r a nkli n
D. R
oosev
elt L
ake
Ross Lake
Lake Chelan
Omak Lake
CurlewLake
Fraser Ri ver
Kettle R
iver
West Ket tle River
Bridge River
Okanag an Lak
e
Shuswap Lake
Adams L
ake
Kamloops LakeSeton Lake
Carpenter Lake
LillooetLake
BonaparteLake
Ander
son La
ke
Nicola
Lake
Skaha Lake
Osoyoos Lake
Spokane
Omak
Vernon
Lytton
Merritt
Kelowna
Osoyoos
Nespelem
ColvilleRepublic
Winthrop
Oroville
KamloopsLillooet
Penticton
Princeton
Grand Forks
Cache Creek
Similk
ameen
Rive
r
Tho mpson
Rive r
Salmon Arm
TwispInchelium
Tonasket
124°W
124°W
123°W
123°W
122°W
122°W
121°W
121°W
120°W
120°W
119°W
119°W
118°W
118°W
117°W
117°W
116°W
48°N
48°N
49°N
49°N
50°N
50°N
51°N
51°N
OKANAGAN ECOREGION:
Map 21. AlternativeFreshwater Portfolios:
High, Middle, andLow Risk
CANADAU.S.A.
Freshwater Portfolio Risk Level High Risk Portfolio 21%Middle Risk Portfolio (plus high risk) 33%Low Risk Portfolio (plus middle and high risk) 52%
The middle risk portfolio represents one level ofrisk to biodiversity. This map illustrates how thesize of the portfolio changes when the risk tobiodiversity is decreased or increased. Lowerrisk encompasses more area; higher riskencompasses less. The high risk portfolio isnested within the middle portfolio, and themiddle portiolio is nested within the lower riskportfolio.
PA C
I FI C
OC
EA
N
IDAHOOREGON
MONTANA
WASHINGTON
BRITISHCOLUMBIA
ALBERTA
C A N A D A
U. S. A.
Level of Riskto Biodiversity
Goal Level(% of historical)
Size of Portfolio(% of Ecoregion)
HighMiddleLow
18%30%48%
21%33%52%
Scale 1:1,900,0000 5 10 Miles
0 10 20 Kilometres
Ecoregion Boundary
International BoundaryUS State Boundary
LakeRiver
Transportation
Water
PoliticalPopulated Place
Major HighwayMinor Highway
The Nature ConservancyWashington Chapter
October 2006
Projection: BC Albers Equal Area
Sources:BC Ministry of Agriculture and Lands,Nature Conservancy of Canada,The Nature Conservancy,WA Dept. of Fish and Wildlife,WA Dept. of Natural Resources,USGS, ESRI
B.C. ConservationData Centre
The Partners (NCC, TNC, WDFW, WNHP, CDC, NatureServe) do not verify orguarantee the accuracy, reliability, or completeness of any data provided. ThePartners provide this data without any warranty of any kind whatsoever, eitherexpress or implied. The Partners shall not be liable for incidental,consequential, or special damages arising out of the use of any data provided.