Paper No. 96131 of the Journal of the American Water Resources Association (formerly Water Resources Bulletin). Discussions are open until August 1, 1998.
URBANIZATION, FLOOD FREQUENCY, AND SALMON ABUNDANCE IN PUGET LOWLAND STREAMS†
Article first published online: 8 JUN 2007
JAWRA Journal of the American Water Resources Association
Volume 33, Issue 6, pages 1289–1297, December 1997
How to Cite
Moscrip, A. L. and Montgomery, D. R. (1997), URBANIZATION, FLOOD FREQUENCY, AND SALMON ABUNDANCE IN PUGET LOWLAND STREAMS. JAWRA Journal of the American Water Resources Association, 33: 1289–1297. doi: 10.1111/j.1752-1688.1997.tb03553.x
- Issue published online: 8 JUN 2007
- Article first published online: 8 JUN 2007
- urban hydrology;
- watershed management;
ABSTRACT: Urbanization history and flood frequencies were determined in six low-order streams in the Puget Lowlands, Washington, for the period between the 1940150s and the 1980190s. Using discharge records from USGS gauging stations, each basin was separated into periods prior to and after urban expansion. Four of the study basins exhibited significant changes in urbanized area, whereas two of the study basins exhibited only limited change in urbanized area and effectively serve as control basins. Each of the basins that experienced a significant increase in urbanized area exhibited increased flood frequency; pre-urbanization 10-year recurrence interval discharges correspond to 1 to 4-year recurrence interval events in post-urbanization records. In contrast, no discernible shift in flood frequency was observed in either of the control basins. Spawner survey data available for three of the study basins reveal systematic declines in salmon abundance in two urbanizing basins and no evidence for decreases in a control basin. These data imply a link between ongoing salmon population declines and either increased flood frequency or associated changes in habitat structure.