OPTIMAL LONG-TERM SCHEDULING OF STORMWATER DRAINAGE REHABILITATION

A mathematical model is developed to optimally schedule long-term stor mwater infrastructure rehabilitation activities. The model is capable of considering multiple rehabilitation projects and is driven by overa ll cost considerations. Rehabilitation activities are scheduled based on perceived reliabilities and future deterioration expected within th e specified planning horizon. Future growth within the stormwater drai nage basin is incorporated using chance constraints that limit the lik elihood that a stormwater discharge exceeds system conveyance capacity . Model structure and development are discussed, and a hypothetical ex ample using a drainage network is presented.