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11 - Modelling

from Part III - Quantifying Connectivity in Geomorphology

Published online by Cambridge University Press:  10 April 2025

By
John Wainwright
Edited by
Ronald Pöppl ,
Anthony Parsons  and
Saskia Keesstra
Ronald Pöppl
Affiliation:
BOKU University Vienna
Anthony Parsons
Affiliation:
University of Sheffield
Saskia Keesstra
Affiliation:
Wageningen Universiteit, The Netherlands
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Summary

Modelling connectivity is a three-stage process. Foremost, is the conceptualization of the connectivity problem. Two end-members of connectivity may be defined. The first considers connectivity to be an emergent property of a system. The second imposes on the system a specific definition of what connectivity is. The former conceptualisation is useful for applications where feedbacks between functional and structural connectivity occur over a shorter timescale than the duration of the model application, and for developing understanding based on model development and application. The latter is better used where prediction or application of the model results is required. It is further necessary to answer questions about space and time scales of the application and data available to support it. Once the basic units of spatial scale can be defined, development of the model can move on to considering what data are most appropriate at that scale, and how to collect them. In the final stage, different model structures that reflect the emerging and parameterized connectivity end-members are considered. The chapter gives examples of these stages with reference to modelling of water flows and consequent erosion.

Keywords

conceptualisation of connectivity in modellingtime and space scales of modellingdata requirementsmodel structures and connectivity
Type
Chapter
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Connectivity in Geomorphology , pp. 256 - 284
Publisher: Cambridge University Press
Print publication year: 2025

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