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Applying Pattern Oriented Sampling in current fieldwork practice to enable more effective model evaluation in fluvial landscape evolution research.

Briant, R. and Cohen, K. and Cordier, S. and Demoulin, A. and Macklin, M. and Mather, A. and Rixhon, G. and Wainwright, J. and Wittmann, H. and Veldkamp, T. (2018) 'Applying Pattern Oriented Sampling in current fieldwork practice to enable more effective model evaluation in fluvial landscape evolution research.', Earth surface processes and landforms., 43 (14). pp. 2964-2980.

Abstract

Field geologists and geomorphologists are increasingly looking to numerical modelling to understand landscape change over time, particularly in river catchments. The application of Landscape Evolution Models (LEMs) started with abstract research questions in synthetic landscapes. Now, however, studies using LEMs on real‐world catchments are becoming increasingly common. This development has philosophical implications for model specification and evaluation using geological and geomorphological data, besides practical implications for fieldwork targets and strategy. The type of data produced to drive and constrain LEM simulations has very little in common with that used to calibrate and validate models operating over shorter timescales, making a new approach necessary. Here we argue that catchment fieldwork and LEM studies are best synchronised by complementing the Pattern Oriented Modelling (POM) approach of most fluvial LEMs with Pattern Oriented Sampling (POS) fieldwork approaches. POS can embrace a wide range of field data types, without overly increasing the burden of data collection. In our approach, both POM output and POS field data for a specific catchment are used to quantify key characteristics of a catchment. These are then compared to provide an evaluation of the performance of the model. Early identification of these key characteristics should be undertaken to drive focused POS data collection and POM model specification. Once models are evaluated using this POM/POS approach, conclusions drawn from LEM studies can be used with greater confidence to improve understanding of landscape change.

Item Type:Article
Full text:(AM) Accepted Manuscript
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Status:Peer-reviewed
Publisher Web site:https://doi.org/10.1002/esp.4458
Publisher statement:This is the accepted version of the following article: Briant, R., Cohen, K., Cordier, S., Demoulin, A., Macklin, M., Mather, A., Rixhon, G., Wainwright, J., Wittmann, H. & Veldkamp, T. (2018). Applying Pattern Oriented Sampling in current fieldwork practice to enable more effective model evaluation in fluvial landscape evolution research. Earth Surface Processes and Landforms 43(14): 2964-2980 which has been published in final form at https://doi.org/10.1002/esp.4458. This article may be used for non-commercial purposes in accordance With Wiley Terms and Conditions for self-archiving.
Date accepted:05 June 2018
Date deposited:06 June 2018
Date of first online publication:26 July 2018
Date first made open access:26 July 2019

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