Understanding Toronto’s Flood risk

Archyde: With Toronto facing increased rainfall and potential flooding, we’re joined today by Dr. anya Sharma, a leading researcher in Low Impact Development (LID) and urban stormwater management. Dr. Sharma, thanks for being with us. Could you paint a picture of Toronto’s current vulnerability to flooding?

dr. Sharma: thanks for having me. Toronto, like many urban centers, faces a growing challenge due to increasing rainfall intensity and aging infrastructure. We’re seeing more frequent and severe storms that overwhelm our existing stormwater drainage systems, leading to localized flooding and water damage.

The Role of Low Impact Development (LID)

Archyde: Your research focuses on Low Impact development, or LID. Can you explain what LID is and how it helps mitigate flooding risks in a city like Toronto?

Dr. Sharma: Absolutely. LID is an approach to land development (or re-development) that works with nature to manage stormwater as close to its source as possible.Think of green roofs, permeable pavements, rain gardens—these are all examples of LID technologies.They help to reduce the volume and rate of stormwater runoff, alleviating pressure on our customary drainage systems and minimizing flood impacts.

Green Roofs and Urban Water Security

Archyde: You’re also involved with the Green Roof Innovation Testing Laboratory. What specific benefits do green roofs offer regarding urban water security and flood prevention in Toronto?

Dr.sharma: Green roofs act like sponges, absorbing a meaningful portion of the rainfall that lands on them. This reduces the amount of water that enters the stormwater system and slows down the rate of runoff. Beyond flood control, green roofs also offer other benefits like reducing urban heat island effect, improving air quality, and even providing habitat for pollinators. It’s a multi-faceted solution to urban challenges.

Wet Weather Policy and Future Solutions

Archyde: What changes in wet weather policy or infrastructure investment do you think are crucial for Toronto to effectively manage stormwater and prevent future flooding?

Dr. Sharma: A multi-pronged approach is key. First, we need to integrate LID principles into all new development projects. this requires policy changes and incentives for developers. Second, we need to invest in upgrading our existing infrastructure to handle larger volumes of stormwater. public awareness and individual actions, like disconnecting downspouts, are very crucial.

A Question for Our Readers

Archyde: a thought-provoking question for our readers: what simple changes could residents make in their own homes and gardens to help alleviate the strain on Toronto’s stormwater system during heavy rainfall events? Share your ideas in the comments below!