2,681
edits
Changes
Jump to navigation
Jump to search
Line 213:
Line 213: − + Line 261:
Line 261: − + Line 293:
Line 293: − +
→Life Cycle Costs
===Water Balance===
===Water Balance===
Recent research indicates that a conservative runoff reduction rate of 10 to 20% can be used depending on whether soils fall in [[Soil groups| hydrologic soil groups A/B or C/D,]] respectively. The runoff reduction rates can be doubled if the native soils on which the swale is located have been tilled to a depth of 300 mm and amended with compost to achieve an organic content of between 8 and 15% by weight or 30 to 40% by volume. The mai ncontributing factors that influence runoff reduction rates for swales are:
Recent research indicates that a conservative runoff reduction rate of 10 to 20% can be used depending on whether soils fall in [[Soil groups| hydrologic soil groups A/B or C/D,]] respectively. The runoff reduction rates can be doubled if the native soils on which the swale is located have been tilled to a depth of 300 mm and amended with compost to achieve an organic content of between 8 and 15% by weight or 30 to 40% by volume. The main contributing factors that influence runoff reduction rates for swales are:
* Native [[Soil groups|soil]] types
* Native [[Soil groups|soil]] types
* [[Grading|Slope]]
* [[Grading|Slope]]
|-
|-
| colspan="2" style="text-align: center;" |'''<u><span title="Note:This estimate is provided only for the purpose of initial screening of LID practices suitable for achieving stormwater management objectives and targets. Performance of individual facilities will vary depending on site specific contexts and facility design parameters and should be estimated as part of the design process and submitted with other documentation for review by the approval authority" >Runoff Reduction Estimate*</span></u>'''
| colspan="2" style="text-align: center;" |'''<u><span title="Note:This estimate is provided only for the purpose of initial screening of LID practices suitable for achieving stormwater management objectives and targets. Performance of individual facilities will vary depending on site specific contexts and facility design parameters and should be estimated as part of the design process and submitted with other documentation for review by the approval authority" >Runoff Reduction Estimate*</span></u>'''
|colspan="2" style="text-align: center;" |'''46% on [[Soil groups|HSG A or B soils]];'''
|colspan="2" style="text-align: center;" |'''45% on [[Soil groups|HSG A or B soils]];'''
'''10% on [[Soil groups|HSG C or D soils]]'''
'''10% on [[Soil groups|HSG C or D soils]]'''
|-
|-
==Life Cycle Costs==
==Life Cycle Costs==
To learn about Life Cycle Costs associated with this practice (i.e. Pre-construction, Excavation, Materials & Installation, Project Management, Overhead, Inspection and Maintenance, Rehabilitation and other associated costs), visit the [[Enhanced Swales: Life Cycle Costs]] page to view accurate BMP cost estimates and learn to plan your own LID-based project budget with [https://sustainabletechnologies.ca/lid-lcct/ STEP's Low Impact Development Life Cycle Costing Tool (LID LCCT)].
To learn about Life Cycle Costs associated with this practice (i.e. Pre-construction, Excavation, Materials & Installation, Project Management, Overhead, Inspection and Maintenance, Rehabilitation and other associated costs), visit the [[Enhanced Swales: Life Cycle Costs]] page to view a cost estimate. Alternatively you can use the [https://sustainabletechnologies.ca/lid-lcct/ STEP's Low Impact Development Life Cycle Costing Tool (LID LCCT)] to generate cost estimates customized to your own LID stormwater design project specifications.
Take a look at the [[Enhanced Swales: Life Cycle Costs]] page by clicking below for further details:
Take a look at the [[Enhanced Swales: Life Cycle Costs]] page by clicking below for further details: