HR: 1340h
AN: H33D-1615    [Abstracts]
TI: Modeling of the Assiniboine Delta Aquifer (ADA) of Manitoba using the Groundwater Storage from GRACE
AU: * Yirdaw-Zeleke, S
EM: umyirdaw@cc.umanitoba.ca
AF: University of Manitoba, Department of Civil Engineering, Winnipeg, MB R3T 5V6, Canada
AU: Snelgrove, K
EM: ksnelgrove@engr.mun.ca
AF: Memorial University of Newfoundland, Faculty of Engineering and Applied Science, St. John's, NL A1B 3X5, Canada
AB: This paper investigates the use of GRACE (Gravity Recovery and Climate Experiment) moisture storages for modeling of the Assiniboine Delta Aquifer (ADA) of Manitoba, Canada. There are great promises from GRACE in capturing regional groundwater storages that are potentially used for modeling application. However, it is well known that these storages are difficult to measure over the scales needed for hydrological model applications. Therefore, prior to modeling the aquifer using GRACE moisture storages, the storages need to be downscaled in to regional groundwater storages using the measured groundwater head data available in the area. Previous studies in the ADA have shown that the downscaled moisture storage estimates compared favorably with the measured groundwater storage over the area. This study focuses on the modeling of the ADA aquifer using the downscaled GRACE moisture storages. These storages will be used to initialize, calibration and potentially steer the hydrologic simulation. The calibrated model then will be validated independently using the measured data. These validations will hopefully provide better explanations for the underlying reasons for the differences in model predictions and measurements. This will identify some of the key assumptions and uncertainties in predicting moisture storage, and so highlight topics for further discussion and research.
DE: 1839 Hydrologic scaling
DE: 1847 Modeling
DE: 1866 Soil moisture
DE: 1876 Water budgets
DE: 1878 Water/energy interactions (0495)
SC: Hydrology [H]
MN: 2007 Fall Meeting