|
Region
|
Where
|
TDS
ppm
|
Other
Characteristics
|
| A)
Coast & Insular Mountains |
Northern
2/3 of Vanisle: coastal drainage of BC |
Very
low. Less than 60 ppm |
Granite
geology; high precipitation; cool summers / warm winters; very unproductive |
| B)
Insular Lowland |
Southern
1/3 of Vanisle and Gulf Islands |
40
- 100 ppm |
Sedimentary
deposits eroded from insular mountains; moderate precipitation; warm
dray summers / mild moist winters; modest productivity |
| C)
Lower Fraser Valley |
Vancouver
to Hope |
Very
low |
Delta
of Fraser River; river and marine deposits; climate similar to B above
but heavier precipitation near mountains |
| D)
Southern Interior Plateau |
Kamloops
/ Merritt / Williams Lk Areas |
High
230 ppm avg. |
Southern
glaciated plateau at elevation 900 - 1800 meters; sedimentary soils;
low precipitation; hot summers / cold winters; very productive |
| E)
Southern Interior Highland |
West
& east Okanagan highlands |
Moderate
70 ppm avg. |
Higher
precipitation; cooler summers and longer more severe winters than
D above; brown stained waters; low productivity |
| F)
Columbia Mountains |
Between
interior plateau in west and the Rocky Mtn trench in east. From Quesnel
in the north to the US border in the south |
Varied |
Varied
conditions range in similarity between A & D above. Varied productivity |
| G)
Southern Rocky Mountain Trench |
Narrow
valley of the trench |
285
ppm avg. |
Glacially
deposited substrates; low precipitation, severe winters, dry summers;
low to medium productivity. |
| H)
Northern Interior Plateau |
Headwaters
of the Fraser, Peace and Skeena Rivers; plateau around Prince George |
- |
Geology
like D above but lower in elevation; more severe winters, dry summers;
low to medium productivity |
| I)
Rocky Mountains |
Between
Rocky Mtn. trench and the Great Divide |
Low
to mederate |
Sedimentary
substrates with recent glaciation; elevations to 3500 meters; severe
winters, cool summers, moderate precipitation; low productivity |
| J)
Tramontane Plains |
Small
area in NE Peace River |
High |
Sedimentary
substrate; low precipitation; sever winter. Moderate summers; high
productivity |
