From ceginfo@u.washington.edu Tue Jun 1 09:57:13 2004 Received: from mxi2.u.washington.edu (mxi2.u.washington.edu [140.142.33.12]) by lists.u.washington.edu (8.12.11+UW04.02/8.12.11+UW04.05) with ESMTP id i51GvC1q091644 for ; Tue, 1 Jun 2004 09:57:13 -0700 Received: from mxout3.cac.washington.edu (mxout3.cac.washington.edu [140.142.32.166]) by mxi2.u.washington.edu (8.12.11+UW04.02/8.12.11+UW04.05) with ESMTP id i51GvBAF009433 for ; Tue, 1 Jun 2004 09:57:11 -0700 Received: from homer40.u.washington.edu (homer40.u.washington.edu [140.142.16.6]) by mxout3.cac.washington.edu (8.12.11+UW04.02/8.12.11+UW04.03) with ESMTP id i51GvA2f029756; Tue, 1 Jun 2004 09:57:11 -0700 Received: from localhost (ceginfo@localhost) by homer40.u.washington.edu (8.12.11+UW04.02/8.12.11+UW04.05) with ESMTP id i51GvApc056832; Tue, 1 Jun 2004 09:57:10 -0700 Date: Tue, 1 Jun 2004 09:57:10 -0700 (PDT) From: Civil and Environmental Engineering To: faculty@ce.washington.edu, cegrads@u.washington.edu Subject: MSCE Defense June 7, 2004 - Amy Engstrom Message-ID: MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII X-Uwash-Spam: Gauge=IIIIIIII, Probability=8%, Report='__TO_MALFORMED_2 0, TO_HAS_SPACES 0.000, SUBJECT_MONTH 0, SUBJECT_MONTH_2 0, __HAS_MSGID 0, __SANE_MSGID 0, __MIME_VERSION 0, __CT_TEXT_PLAIN 0, __CT 0, __C230066_P2 0, __CHILD_PORN_NOT_1 0, __MIME_TEXT_ONLY 0' The final examination for the MSCE degree for Amy Engstrom will be held on Monday, June 7, 2004 in More 219 at 3:30 p.m. Title: Characterizing Water Quality of Urban Stormwater Runoff: Heavy Metals and Solids Interactions in Seattle Residential Catchments Abstract: Stormwater quality and quantity were investigated in urbanized catchments in the Pipers Creek watershed in North Seattle in order to characterize existing rates and processes of stormwater runoff in areas of moderate-density residential development. Hydrologic monitoring and water-quality sampling during storm events were performed as part of this project from fall 2002 through spring 2004. Results of the sampling program indicate that concentrations of total and dissolved metals, total suspended solids, nutrients, total petroleum hydrocarbons, pesticides, herbicides, and e coli and fecal coliform bacteria present in the runoff from these areas are not insignificant, especially because they represent only a fraction of the total pollutant loading experienced by the receiving stream. Detailed analysis of heavy metal concentrations, total suspended solids concentrations, and concentrations of solids in the clay and silt sizes ranges has provided insight into how solids and metals interact in an urban stormwater environment. Since solids can affect the bioavailable portion of metals in aqueous environments and act as transportation mechanisms for constituents such as heavy metals, the relationships between solids and metals in urban runoff cannot be ignored. These findings indicate the importance of mitigating the impacts that urban development has had on the runoff from these catchments, given the regional goal of improved instream aquatic conditions for native biota, particularly salmon. This research is part of the City of Seattle's Natural Drainage Systems project, which has been responsible for several stormwater management projects already constructed within the watershed. As additional projects are implemented in the coming years, results from this research will allow for a comparison of pre- and post-improvement stormwater runoff conditions. This should document the effectiveness of these various stormwater management techniques on alleviating the effects of urbanization, both in the catchments themselves and on downstream natural systems. Professor Derek Booth, Chair > ************************************************* > Amy M. Engstrom > Graduate Student, University of Washington > Center for Water and Watershed Studies > Dept. of Civil and Environmental Engineering > Box 352700 > Seattle, Washington 98195-2700 > phone: 206-543-6272 > ************************************************* > > > > .