Line 8: Line 8:
 
<td>Cold Temperatures</td>
 
<td>Cold Temperatures</td>
 
<td>
 
<td>
►Pipe freezing
+
*Pipe freezing
Permanent pool ice covered
+
*Permanent pool ice covered
Reduced biological activity
+
*Reduced biological activity
Reduced oxygen levels during ice cover
+
*Reduced oxygen levels during ice cover
Reduced settling velocities</td>
+
*Reduced settling velocities</td>
 
</tr>
 
</tr>
 
<tr>
 
<tr>
 
<td>Deep Frost Line</td>
 
<td>Deep Frost Line</td>
 
<td>
 
<td>
Frost heaving
+
*Frost heaving
Reduced soil infiltration
+
*Reduced soil infiltration
Pipe freezing</td>
+
*Pipe freezing</td>
 
</tr>
 
</tr>
 
<tr>
 
<tr>
 
<td>Short Growing Season</td>
 
<td>Short Growing Season</td>
 
<td>
 
<td>
Short time period to establish vegetation
+
*Short time period to establish vegetation
Different plant species appropriate to cold climates than moderate climates</td>
+
*Different plant species appropriate to cold climates than moderate climates</td>
 
</tr>
 
</tr>
 
<tr>
 
<tr>
 
<td>Significant Snowfall</td>
 
<td>Significant Snowfall</td>
 
<td>
 
<td>
High runoff volumes during snowmelt and rainon-snow
+
*High runoff volumes during snowmelt and rainon-snow
High pollutant loads during spring melt
+
*High pollutant loads during spring melt
Other impacts of road salt/deicers
+
*Other impacts of road salt/deicers
Snow management may affect BMP storage</td>
+
*Snow management may affect BMP storage</td>
  
 
</table>
 
</table>

Revision as of 15:39, 10 January 2013

Challenges to the Design of Runoff Management Practices in Cold Climates (Source: Caraco and Claytor,1997)

Climatic Condition BMP Design Challenge
Cold Temperatures
  • Pipe freezing
  • Permanent pool ice covered
  • Reduced biological activity
  • Reduced oxygen levels during ice cover
  • Reduced settling velocities
Deep Frost Line
  • Frost heaving
  • Reduced soil infiltration
  • Pipe freezing
Short Growing Season
  • Short time period to establish vegetation
  • Different plant species appropriate to cold climates than moderate climates
Significant Snowfall
  • High runoff volumes during snowmelt and rainon-snow
  • High pollutant loads during spring melt
  • Other impacts of road salt/deicers
  • Snow management may affect BMP storage