DesignFlow

Urban Lake Management
Review of Shallow Lake Ecology and Detention Time Criteria
Client: Water by Design
A scientific review was undertaken of shallow lake ecology to access the potential effectiveness of manipulating lake retention times to reduce the risk of cyanobacterial growth in constructed lakes. The review included:
The review concluded that the manipulation of urban lake detention times using the current probabilistic method represents a precautionary approach at best, and that no strategy will guarantee full protection against cyanobacterial blooms. The control of cyanobacterial biomass via lake retention time design criteria will be most likely facilitated by constant flushing of cyanobacterial biomass from the lake system, whereas control of cyanobacterial biomass via episodic washout (stormwater runoff) is unlikely to provide acceptable management of cyanobacterial blooms.
 
 
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