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A Right-of-Way Stormwater Low Impact Development Practice

2015; Linguagem: Inglês

10.14796/jwmm.c390

2292-6062

James Li, Darko Joksimovic, John C. Tran,

Traffic Prediction and Management Techniques

Road right-of-way can provide a good retrofit opportunity to implement stormwater low impact development (LID) technologies.In Canada and the northern United States, stormwater management should focus not only in summer and fall but also winter and spring.A stormwater exfiltration system was designed to manage stormwater over four seasons by retrofitting roads with two 200 mm perforated pipes with ends capped below a storm sewer system.The design concept is to direct road runoff of up to 15 mm rainfall to these two perforated pipes and fill the void space of the sewer trench for exfiltration to the surround soil at all times (i.e.including snowmelts and rainfalls during winter and the early spring seasons).In 1993, 2.5 km of this exfiltration system was constructed in Etobicoke, Toronto, and subsequent monitoring results indicated that a long duration rainfall, ≤28 mm over 22.5 h, was almost completely captured without overflowing to the storm sewer above.This paper presents the planning and design criteria, construction and maintenance, performance evaluation, and costs of this LID based on the Etobicoke application.