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Risk Analysis Application for Assessing the of Low Impact Development for CSO Control Using
Book chapter

Risk Analysis Application for Assessing the of Low Impact Development for CSO Control Using

Chris Behr and Franco Montalto
Low Impact Development for Urban Ecosystem and Habitat Protection
01 Jan 2009
DOI: https://doi.org/10.1061/41009(333)112

Abstract

Conferences cost analysis Cost-benefit analysis Maintenance Q1 Sewers surface area Technology Watersheds
This paper will describe ongoing efforts to LIDRA, a previously developed model for rapidly the cost-effectiveness of investments in low development (LID) for reducing combined sewer (CSOs) in urban watersheds. The efforts discussed this paper involve the application of risk LIDRA can be used to simulate the of reducing CSOs through incremental installation LID technologies across urban watersheds, when are introduced alone, or in combination with CSO abatement technologies. The potential in CSOs resulting from various levels of LID is simulated using a simple power function. A cost analysis is used to compare LID with other Given that LID implementation on private property to reduced CSOs, a cost sharing scheme is that divides the total LID cost into a private fraction (born by the property owner) and a cost fraction (provided by a public agency). The improvements described in this paper use risk to establish ranges and probability distributions the key variables. These ranges and distributions specific to each type of land surface and BMP and (a) Existing runoff coefficient; (b) BMP runoff (c) Percent of surface area replaced with BMP; (d) Number of years until suitable BMPs maximum coverage; (e) Installation costs; and, Maintenance costs. Some sample results are

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