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Description of Surveyed Area – Ecodistricts
7
Ecodistricts
Each ecoregion consists of one or more ecodistricts (Figure 3). Ecodistricts are similar in landform, relief, surficial
material, soil, vegetation and land use. Ecodistricts with less than ten sites were combined with adjacent ecodistricts
in the summaries. Climate information for major ecodistricts included in the survey is given in Table 1.
Table 1. Climate normals for the ecodistricts included in the Alberta survey
1,2
Average Daily
Annual
Precipitation
Growing
Temperature (°C)
Precipitation
Surplus/
Season
Ecoregion and Ecodistrict
3
January
July
(mm)
Deficit (mm)
Length
(days)
Fescue Grassland
Delacour Plain (798)
-11.2
16.6
416
-108
183
Cardston Plain (800)
-7.3
17.1
518
-9
189
Twin Butte Foothills (801)
-7.3
16.2
656
148
184
Moist Mixed Grassland
Majorville Upland (787)
-11.2
17.7
393
-148
186
Drumheller Plain (781)
-12.9
17.0
380
-153
182
Wintering Hills (786)
-13.3
17.2
384
-149
182
Standard Plain (788)
-11.9
17.1
374
-159
183
Blackfoot Plain (790)
-11.2
17.3
382
-154
186
Lethbridge Plain (793)
-8.5
18.1
403
-148
195
Mixed Grassland
Brooks Plain (812)
-13.3
18.4
336
-213
187
Berry Creek Plain (806)
-14.4
18.2
334
-211
184
Bindloss Plain (815)
-11.6
19.7
300
-277
194
Bow City Plain (818)
-12
18.3
348
-204
189
Vauxhall Plain (823)
-10.8
18.4
331
-223
192
Foremost Plain (828)
-10.1
19.0
341
-221
195
Purple Springs Plain (829)
-9.8
18.7
352
-209
196
1
Agriculture and Agri-Food Canada.
1997. Canadian ecodistrict climate normals 1961-1990. [Online]
Available: http://sis.agr.gc.ca/cansis/nsdb/ecostrat/district/climate.html [2 September 2009]
2
Ecodistrict names provided by
Tony Brierley
, Land Resource Unit, Agriculture and Agri-Food Canada,
Edmonton, Alberta
3
Indented ecodistricts are combined with preceding ecodistricts in summaries