Comment 32660

By JonC (registered) | Posted August 07, 2009 at 13:05:10

"Also, can you provide the name of a qualified engineer who has publicly made the same claims as you about the RHVP / "sprawl" and flooding?"

While there are a multitude of articles on the affect of urbanization on rainfall, here is a local example from 2006 based on planned development in the Davis watershed (up near the karst).

https://www.myhamilton.ca/NR/rdonlyres/D...

The whole thing is pretty interesting, but for this purpose, you'll want to focus on section 7.2 onward

Including choice quotes such as "Results in Table 7.16 further indicate that proposed development under future land use conditions would increase runoff volume by 54%, while decreasing infiltration by approximately 12%."

Or

"Potential impacts may occur due to future watershed development in the headwater area of Davis Creek, which is the only largely undeveloped area remaining. The headwater area is a major source of base flow from groundwater inputs, and loss of base flow could potentially occur due to the interception of groundwater flow by infrastructure. Urban development of the existing agricultural and naturalizing areas of the headwater area would increase watershed imperviousness, and therefore exacerbate the existing problems of erosion and extreme flow conditions that impact habitat and habitat utilization."

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