JSM 2004 - Toronto

Abstract #301046

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Activity Number: 294
Type: Topic Contributed
Date/Time: Wednesday, August 11, 2004 : 8:30 AM to 10:20 AM
Sponsor: Section on Statistics and the Environment
Abstract - #301046
Title: Spatial-temporal-frequency Analysis of Run-off and Groundwater in the Greater Toronto Area, Canada
Author(s): Qiuming Cheng*+
Companies: York University/China University of Geosciences
Address: 4700 Keele St., Toronto, ON, M3J1P3, Canada
Keywords: spatial analysis ; water systems ; statistical analysis ; hydrological modelling ; glacier landscape ; GIS
Abstract:

It is essential to understand the interactions among precipitation, groundwater recharge/discharge, and surface water run-off for environmental planning and water resources management in an area. Modeling landscape with high-resolution digital elevation model (DEM) in a geographic information system can associate rainfall, run-off, and groundwater systems and model their interactions in the watershed context using various statistical models. It has been statistically demonstrated that topological, hydrological, and geological characteristics of drainage basins in the Oak Ridges Moraine Area have significant influences on locations of springs and flowing wells, response of river flow to rainfall events, and the short-term and long-term dependency of run-off. Base flow component was separated from the total river flow using an integrated spatial-frequency analysis model to reflect the flow components supplied by ground water discharge. The remaining surface run-off was further associated to rainfall event through a surface run-off SCS model with the input parameters estimated using a non-linear multivariate regression.

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