A systematic analysis of the constraints to urban stream enhancements

Citation
Aj. Hess et Pa. Johnson, A systematic analysis of the constraints to urban stream enhancements, J AM WAT RE, 37(1), 2001, pp. 213-221
Citations number
16
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Environment/Ecology
Journal title
JOURNAL OF THE AMERICAN WATER RESOURCES ASSOCIATION
ISSN journal
1093-474X → ACNP
Volume
37
Issue
1
Year of publication
2001
Pages
213 - 221
Database
ISI
SICI code
1093-474X(200102)37:1<213:ASAOTC>2.0.ZU;2-1
Abstract
The environment surrounding urban streams imposes constraints upon stream e nhancement projects. Constraints include bridges, culverts, highways, sewer and water lines, lack of easements, and other floodplain structures. The c onsequences of failure of these infrastructure constraints can be significa nt and should be considered in the design process. Fault tree analysis prov ides a systematic technique for analyzing the interactions of events that c ould lead to infrastructure failure. A case study of a stream in Pittsburgh , Pennsylvania, shows that fault tree analysis can effectively model the in teractions between the stream system and the infrastructure constraints and predict the most likely modes of failure. In addition, the relative succes s of alternative designs and failure mitigation techniques can be assessed using this analysis tool, lending insight into the urban stream enhancement design process. The method could also provide justification in the design permitting process and input for risk assessment.