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Dynamic fuzzy modeling of storm water infiltration in urban fractured aquifers

Journal of Hydrologic Engineering

By:
, , and
DOI: 10.1061/(ASCE)1084-0699(2002)7:5(380)

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Abstract

In an urban fractured-rock aquifer in the Mt. Eden area of Auckland, New Zealand, disposal of storm water is via "soakholes" drilled directly into the top of the fractured basalt rock. The dynamic response of the groundwater level due to the storm water infiltration shows characteristics of a strongly time-varying system. A dynamic fuzzy modeling approach, which is based on multiple local models that are weighted using fuzzy membership functions, has been developed to identify and predict groundwater level fluctuations caused by storm water infiltration. The dynamic fuzzy model is initialized by the fuzzy clustering algorithm and optimized by the gradient-descent algorithm in order to effectively derive the multiple local models-each of which is associated with a locally valid model that represents the groundwater level state as a response to different intensities of rainfall events. The results have shown that even if the number of fuzzy local models derived is small, the fuzzy modeling approach developed provides good prediction results despite the highly time-varying nature of this urban fractured-rock aquifer system. Further, it allows interpretable representations of the dynamic behavior of the groundwater system due to storm water infiltration.

Additional Publication Details

Publication type:
Article
Publication Subtype:
Journal Article
Title:
Dynamic fuzzy modeling of storm water infiltration in urban fractured aquifers
Series title:
Journal of Hydrologic Engineering
DOI:
10.1061/(ASCE)1084-0699(2002)7:5(380)
Volume
7
Issue:
5
Year Published:
2002
Language:
English
Larger Work Type:
Article
Larger Work Subtype:
Journal Article
Larger Work Title:
Journal of Hydrologic Engineering
First page:
380
Last page:
391