Abstract Details
Activity Number:
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129
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Type:
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Contributed
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Date/Time:
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Monday, August 10, 2015 : 8:30 AM to 10:20 AM
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Sponsor:
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Section on Statistics and the Environment
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Abstract #317201
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View Presentation
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Title:
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The Torgegram for Fluvial Variography: Characterizing Spatial Dependence on Stream Networks
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Author(s):
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Dale Zimmerman* and Jay Ver Hoef
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Companies:
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The University of Iowa and NOAA National Marine Mammal Lab
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Keywords:
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Geostatistics ;
Moving average models ;
Semivariogram ;
Spatial statistics
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Abstract:
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We introduce a graphical diagnostic called the Torgegram for characterizing the spatial dependence of a variable on a stream network. The Torgegram consists of four component empirical semivariograms, each one corresponding to a particular combination of flow-connectedness within the network and model type (tail-up/tail-down). We show how an overall strategy for fluvial variography can be based on a systematic analysis of the Torgegram.
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Authors who are presenting talks have a * after their name.
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