Preferential Flow under Streets and Sidewalks. (5320)
Authors:
T. Nehls* - Techn.Univ. of Berlin H. Stoffregen - Techn.Univ. of Berlin D. Scherer - Techn.Univ. of Berlin G. Wessolek - Techn.Univ. of Berlin
Abstract:
Increasing rainwater infiltration in urban areas is a main idea of ecological urban planning. De-sealing of sealed areas and increased use of pavements instead of tar are the corresponding strategies, but there is no knowledge about the consequences for the groundwater quality. Besides chemical properties of the infiltrating water the flow characteristics in paved urban soils may be important for risk assessments.
Do pavement geometries affect the flow patterns in the underlying soils? Dye tracer experiments on paved urban soils in Berlin revealed the susceptibility of some paved soils for preferential flow.
Preferential flow patterns are shown as an effect of pavement geometry. Moreover a new image analysis tool has been developed, that is suitable for heterogeneously coloured soils in general and which might be useful for other applications too.
Speaker Information: Thomas Nehls, Techn.Univ. of Berlin, TU Berlin, Institut für Ökologie, FG
Standortkunde & Bodenschutz, Salzufer 12, 10587 Berlin, Germany, Berlin, ; Phone: 0049-30-314 73 535;
E-mail: [email protected]
Session Information: Monday, November 1, 2004, 5:00 PM-6:00 PM Presentation Start: 5:00 PM (Poster Board Number: 2807)
Keywords: preferential flow; dye tracer; paved urban soils; image analysis
