MURAL - Maynooth University Research Archive Library



    Geographically weighted methods and their use in network re-designs for environmental monitoring


    Harris, Paul and Clarke, Annemarie and Juggins, Steve and Brunsdon, Chris and Charlton, Martin (2014) Geographically weighted methods and their use in network re-designs for environmental monitoring. Stochastic Environmental Research and Risk Assessment, 28. pp. 1869-1887. ISSN 1436-3240

    [img]
    Preview
    Download (3MB) | Preview


    Share your research

    Twitter Facebook LinkedIn GooglePlus Email more...



    Add this article to your Mendeley library


    Abstract

    Given an initial spatial sampling campaign, it is often of importance to conduct a second, more targeted campaign based on the properties of the first. Here a net- work re-design modifies the first one by adding and/or removing sites so that maximum information is preserved. Commonly, this optimisation is constrained by limited sampling funds and a reduced sample network is sought. To this extent, we demonstrate the use of geographically weighted methods combined with a location-allocation algorithm, as a means to design a second-phase sampling campaign in univariate, bivariate and multivariate contexts. As a case study, we use a freshwater chemistry data set covering much of Great Britain. Applying the two-stage procedure enables the optimal identification of a pre- specified number of sites, providing maximum spatial and univariate/bivariate/multivariate water chemistry informa- tion for the second campaign. Network re-designs that account for the buffering capacity of a freshwater site to acidification are also conducted. To complement the use of basic methods, robust alternatives are used to reduce the effect of anomalous observations on the re-designs. Our non-stationary re-design framework is general and provides a relatively simple and a viable alternative to geostatistical re-design procedures that are commonly adopted. Particu- larly in the multivariate case, it represents an important methodological advance.

    Item Type: Article
    Keywords: Non-stationarity; Summary statistics; PCA; Location-allocation; Robust; � Acidification
    Academic Unit: Faculty of Science and Engineering > Research Institutes > National Centre for Geocomputation, NCG
    Item ID: 5896
    Identification Number: https://doi.org/10.1007/s00477-014-0851-1
    Depositing User: Prof. Chris Brunsdon
    Date Deposited: 21 May 2015 10:27
    Journal or Publication Title: Stochastic Environmental Research and Risk Assessment
    Publisher: Springer Verlag
    Refereed: Yes
    URI:
    Use Licence: This item is available under a Creative Commons Attribution Non Commercial Share Alike Licence (CC BY-NC-SA). Details of this licence are available here

    Repository Staff Only(login required)

    View Item Item control page

    Downloads

    Downloads per month over past year

    Origin of downloads