Award details

Investigating a general method to 'scale up' process models in the arable landscape

Reference	BBS/E/C/00004686
Principal Investigator / Supervisor	Professor Richard Lark
Co-Investigators / Co-Supervisors
Institution	Rothamsted Research
Department	Rothamsted Research Department
Funding type	Research
Value (£)	80,320
Status	Completed
Type	Institute Project
Start date	29/03/2005
End date	28/04/2008
Duration	37 months

Abstract

The overall aim of this proposal is to develop a generic methodology which can be used to apply a model of a process at different spatial scales of generalization. This is to be based on spatial analysis of data on model outputs and of measured parameters obtained by cost-effective spatial sampling. To this end our objectives are: 1. To show how, using a process model at a fine spatial scale (such as the soil core) and data from appropriate spatial sampling, we may identify the key model parameters and input variables for predicting outcomes of the model process at coarser spatial scales of generalization. 2. To develop a method to assess whether a model is effectively linear in its key parameters at a particular spatial scale, given both its mathematical form and the variability of key parameters and variables. 3. To show how we can cost-effectively sample key model parameters, variables and outputs so as to quantify their (co)variation at pertinent spatial scales. 4. To show how the validity of models adapted for use at particular spatial scales may be assessed. We shall address these objectives in the context of a case study, the prediction of ammonia emissions from arable soils after urea application, to be conducted at within-field, within-farm and within-region (between-parent material) scales in Mid Bedfordshire.

Summary

unavailable

Committee	Closed Committee - Agri-food (AF)
Research Topics	Soil Science, Technology and Methods Development
Research Priority	X – Research Priority information not available
Research Initiative	X - not in an Initiative
Funding Scheme	X – not Funded via a specific Funding Scheme

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