Canada South Nation Watershed

Site Description

Locations

WEBs Sub-Watershed
Site Extent   Centroid: 45.265, -75.176
Top left: 45.268, -75.214 Bottom Right: 45.248, -75.142

South Nation Watershed
Site Extent   Centroid: 45.332, -75.050
Top left: 45.416, -75.214 Bottom Right: 45.249, -74.886

Location:

The overall extent of the South Nation watershed is approximately 3,900 km², with a centroid at coordinates 45º 11’ 53.4”N, 75º 15’ 39.6”W . Nestled within the greater watershed are two smaller study basins of focused study and research, namely WEBs (centroid of 45º 15’ 49.1”N, 75º 10’ 41.9”W,  approximately) and Casselman.

Drainage:

WEBs (Watershed evaluation of Beneficial Management Practices) comprises a sub-‘tileshed’ (tile drained watershed) area of approximately 950 hectares.  Mean field sizes within the WEBs basin are 4.75 hectares, with the largest reaching over 24 hectares.

Crop calendar and Agriculture methods:

Livestock and cash crops in the watershed consist of corn, soybean, wheat (Triticum spp.), and forages. Field crop rotations can vary. For cropland without hay planting, crop rotations following a three year sequence: cereals-corn-soybean, can be found. Cropland with hay planting can be found to have a six year cycle: cereals-corn-soybean, and the following three years in hay. However, rotations can be heavily impacted by market conditions, and repetitive sequences of crops have been observed (for example corn).

Farms located within the WEBs basin are generally dedicated to dairy production. Manure spreading is normally done in either late summer or early fall. Conventional tillage, which is the dominant tillage practice in the study area, typically consists of spring cultivation and fall ploughing.

Just less than 50% of the WEBs study area receives liquid or solid bovine manure as a fertilizer amendment in spring and/or fall. Chemical fertilizer application rate varies according to the type of crop grown.

Climate and Weather:

Situated in a cool temperate humid continental climate in eastern Ontario Canada, mean yearly air temperatures are approximately 6.2ºC, total yearly precipitation is approximately 963 mm, and total yearly rainfalls are approximately 771 mm (Environment Canada, Government of Canada, 1971-2000 normals).

Soils:

Dominant soils at the WEBs site are Bainsville silt loams, characterized by layered silt and fine sand, overlying clayey deposits, with poor natural drainage. The lower hydraulic conductivity clayey soils lay beneath top soils at approximately 1.0–1.5m depth.

Topography:

Local slope of the study area is generally <1%.

Figure 1: South Nation Watershed JECAM Site

©2015 Joint Experiment for Crop Assessment and Monitoring
© HER MAJESTY THE QUEEN IN RIGHT OF CANADA SA MAJESTE LA REINE DU CHEF DU CANADA (2015)