Anionic Polyacrylamide Hydraulic Dredging with On-site Disposal
Prepared By: Toronto and Region Conservation Authority (TRCA) Introduction The use of polymer technology during both mechanical and hydraulic dredging operations is gaining popularity as non-conventional methods are explored by the stormwater management community. Hydraulic dredging offers a viable alternative to stormwater management facility clean out when site and project specific constraints make mechanical dredging […]
Water-Absorbing Polymer Assisted Mechanical Dredging
Prepared By: Toronto and Region Conservation Authority (TRCA) Introduction Mechanical dredging is one of the most common methods used to remove sediment accumulated in stormwater management facilities. It involves the removal of sediment by dredging the material out of the water body being cleaned, typically with an excavator. Prior to implementation, excess water is pumped […]
Polymer Assisted Hydraulic Dredging of a Stormwater Pond
Prepared By: Toronto and Region Conservation Authority (TRCA) Introduction As stormwater ponds introduced in the 1990’s continue to age, the number of ponds requiring cleanouts is increasing rapidly. Mechanical dredging of the settled sediment layer is the conventional method of choice; however, there is growing interest in alternative methods that may help reduce cost and […]
Winter Mechanical Dredging of a Stormwater Pond Forebay
Prepared By: Toronto and Region Conservation Authority (TRCA) Introduction Stormwater management ponds have been widely implemented since the 1990’s to detain and remove pollutants from urban stormwater runoff. Their primary means of water quality improvement occurs through settling of pollutant-laden sediment under low turbulence conditions. Sediment removal efficiency decreases with pond age due to the […]
Winter Mechanical Dredging of a Stormwater Pond
Prepared By: Toronto and Region Conservation Authority (TRCA) Introduction Stormwater ponds are commonly used in urban settings to control the quantity and quality of stormwater runoff. However, as ponds age, the level of accumulated sediment rises which ultimately displaces the potential volume available for water storage and treatment during storms. Mechanical dredging is the method […]
Smart Blue Roof Case Study
Prepared by: Credit Valley Conservation Blue Roof System Overview The smart blue roof (SBR) system at Credit Valley Conservation’s (CVC) head office in Mississauga, Ontario, is an innovative retrofit designed to capture, store, and reuse stormwater. The blue roof system reduces strain on the storm sewer system, mitigates the risk of downstream flooding, and provides […]
ThermalPoint Case Study 1
Prepared by The Sustainable Technologies Evaluation Program (STEP) March 2025 Contact: step@trca.ca Background The thermal balance point temperature (TBPT) is a key metric for sizing heat pumps. It represents the outdoor temperature at which a heat pump can no longer meet a home’s heating demand without supplemental heating. Graphically, the TBPT is the outdoor temperature […]
ThermalPoint Case Study 2
Prepared by The Sustainable Technologies Evaluation Program (STEP) March 2025 Contact: step@trca.ca Background The thermal balance point temperature (TBPT) is a key metric for sizing heat pumps. It represents the outdoor temperature at which a heat pump can no longer meet a home’s heating demand without supplemental heating. Graphically, the TBPT is the outdoor temperature […]
Modelling the performance of a stormwater treatment train in a residential subdivision
Table of Contents Introduction This report presents the outcomes of a calibrated stormwater management model (SWMM) that represents a residential subdivision with a low impact development treatment train and a downstream stormwater management wet pond. It includes a discussion of essential parameters and methods for stormwater modelling in future designs. This model was developed using […]
Beaver Management within Stormwater Management Features
Prepared By: Lake Simcoe Region Conservation Authority (LSRCA) Introduction The beaver is the largest rodent in North America, with the average adult weighing from 16 to 32 kg and measuring up to 1.3 m long. A beaver’s life is inextricably connected to cutting trees—for sustenance and for habitation. In nature, beaver activity plays an important ecological […]