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Activity Number: 129
Type: Contributed
Date/Time: Monday, August 10, 2015 : 8:30 AM to 10:20 AM
Sponsor: Section on Statistics and the Environment
Abstract #317201 View Presentation
Title: The Torgegram for Fluvial Variography: Characterizing Spatial Dependence on Stream Networks
Author(s): Dale Zimmerman* and Jay Ver Hoef
Companies: The University of Iowa and NOAA National Marine Mammal Lab
Keywords: Geostatistics ; Moving average models ; Semivariogram ; Spatial statistics
Abstract:

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.

Authors who are presenting talks have a * after their name.

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