Page 303 - Geosystems An Introduction to Physical Geography 4th Canadian Edition

Bering Sea
150°
150°
Beaufort Sea 120°
Babbage River
Great Bear Lake
GREENLAND
60°
Baffin Bay
ICELAND
60°
Yukon R.
Yukon R.
Yukon R.
Gulf of Alaska
Freshwater Creek
Chukchi Sea
ARCTIC OCEAN
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Churchill R
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45°
45°
Columbia R.
Columbia R.
Missouri R.
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L. Ontario
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L. Erie
average runoff for selected drainage basins ( in size from 500–1000 km2.
) ranging
FRESHWATER CREEK
High Average Low
Atlantic Ocean Hudson Bay Arctic Ocean
100 80 60 40 20
Jan. Mar. May July Sept. Nov.
400 320 240 160
BABBAGE RIVER
100
400 320 240 160
Monthly runoff (mm)
Monthly runoff (mm)
Monthly runoff (mm)
Monthly runoff (mm)
Monthly runoff (mm)
Monthly runoff (mm)
Monthly runoff (mm)
Monthly runoff (mm)
400 320 240 160
80
ISKUT RIVER
1000
SAN JUAN RIVER
High Average Low
400
NITH RIVER
400 320 240 160
80
CANAAN RIVER
High Average Low
165°
90°
High
Average 80 Low
60 40 20
Jan. Mar. May July Sept. Nov.
135°
CANADA
Great Slave Lake
Iskut River Lake Athabasca
Keeley River
Lake Winnipeg
UNITED STATES
Hudson Bay
Lake Nipigon
L. Superior
L. Huron
Rivière du Nord
Labrador Sea
Canaan River
PACIFIC OCEAN
135°
San Juan River
AVERAGE ANNUAL RIVER FLOW
85 2500 5000 7500 10 000 12 500 Great Salt Lake
HYDROGRAPHS OF MONTHLY RUNOFF
Hydrographs show the mean monthly lowest, highest, and
Smallwood Res.
Nith River
Pacific Ocean
Internal Drainage Area
KEELEY RIVER
High Average Low
45°
80 0000
Jan. Mar. May July Sept. Nov.
80
Jan. Mar. May July Sept. Nov.
High
Average 800 Low
600 400 200
105°
75°
15°
30°
ATLANTIC OCEAN
OCEAN DRAINAGE AREA
High 320 Average
Low
240 160 80
0000
Jan. Mar. May July Sept. Nov. Jan. Mar. May July Sept. Nov. Jan. Mar. May July Sept. Nov. Jan. Mar. May July Sept. Nov.
▲Figure 9.18 Streamflows in Canada. The greatest volume of streamflow in Canada exits northward through the Mackenzie river. This streamflow represents the surface runoff from that drainage basin. next in volume is the flow to the atlantic from the great lakes through the St. lawrence river. The hydrographs show the effects of seasonality on the timing of the melt. [Map and data used with permission of natural resources Canada.]
Chapter 9 Water resources 267
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Mississippi
0
250 500 KILOMETRES
60° 60
Glaciers
Diverted Drainage Areas (Diverted flow 28 m3s–1) Direction of flow
RIVIÈRE DU NORD
High Average Low
M
Platte River
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