HR: 1340h
AN: H23G-1696    [Abstracts]
TI: Modeling of Thermal Runoff From an Asphalt-Paved Plot in the Framework of the Mass Response Functions
AU: * Kim, K
EM: emailmatthias@gmail.com
AF: Guem River Environmental Research Center, National Institute of Environmental Research, Choongbook Okcheon-goon Annae-myun Dongdae-ri 395-1, Okcheon, 373-812, Korea, Republic of
AU: Thompson, A M
EM: amthompson2@wisc.edu
AF: Department of Biological Systems Engineering, University of Wisconsin-Madison, 460 Henry Mall, Madison, WI 53706, United States
AU: Botter, G
EM: botter@idra.unipd.it
AF: Dipartimento IMAGE and International center for Hydrology "D. Tonini", University of Padova, dept. IMAGE, via Loredan 20, Padova, 35131, Italy
AB: During hot summer months, impervious surfaces within urban areas may store significant amounts of thermal energy, which may be rapidly transferred to stream waters during runoff events. Modeling of heat release from impervious areas to stream waters thus represents a first, necessary step to quantify possible negative impacts of increased stream water temperature on nearby aquatic ecosystems. In this paper, a stochastic Lagrangian approach is developed to simulate heat transfer from an impermeable surface to runoff. The approach is based on the framework of the mass response functions (MRFs), which was originally developed for modeling non-point source pollutant transport in watersheds. The MRF approach has been adapted to describe heat transfer from impervious surfaces to runoff by coupling a heat balance at the asphalt/water interface and a one-dimensional heat diffusion equation within the asphalt. The model incorporates a simplified, physically based description of all the heat fluxes possibly affecting the ensuing thermal response of impervious areas (e.g., solar radiation, evaporation). The model was applied to an artificial asphalt-paved plot of 90 m2 where it was able to accurately reproduce the temperature variation of the asphalt surface and runoff during an artificially produced rainfall event. The effect of the heat diffusivity on the surface temperature response to rainfall input was also examined, showing that the effect could be significant depending on vertical temperature distributions of the plot.
DE: 1814 Energy budgets
DE: 1847 Modeling
DE: 1850 Overland flow
DE: 1871 Surface water quality
SC: Hydrology [H]
MN: 2007 Fall Meeting