Identification of longitudinal and temporal patterns of phosphorus fractionation in river sediments by non-parametric statistics and pattern recognition techniques
Φόρτωση...
Ημερομηνία
Τίτλος Εφημερίδας
Περιοδικό ISSN
Τίτλος τόμου
Εκδότης
Elsevier
Περίληψη
Τύπος
Είδος δημοσίευσης σε συνέδριο
Είδος περιοδικού
peer reviewed
Είδος εκπαιδευτικού υλικού
Όνομα συνεδρίου
Όνομα περιοδικού
Desalination
Όνομα βιβλίου
Σειρά βιβλίου
Έκδοση βιβλίου
Συμπληρωματικός/δευτερεύων τίτλος
Περιγραφή
A combination of non-parametric explanatory procedures and pattern recognition techniques is introduced in this study as an alternative tool to the assessment of sedimentary P fractionation. The complex raw data matrix was treated with a series of parametric and non-parametric techniques such as correlation analysis, cluster analysis, factor analysis/principle components analysis, discriminant analysis, multidimensional scaling, Kruskal-Wallis analysis of variance and non-parametric median test. Each of these procedures has been directed towards the identification of specific mechanisms that control P biogeochemistry in the river sediment. Non-parametric tests were proven as a very powerful tool in interpreting temporal variations of the data in a short-term basis as opposed to previous procedures predicting seasonal or annual changes. On the other hand, parametric techniques were not always able to delineate a reduced number of indicator variables responsible for the large variations in sediment quality, necessitating the application of various techniques in order to interpret the intricate mechanisms occurring in the sediment phase. The examined procedures provide the basis for identifying the patterns of sedimentary P associated with seasonal and spatial patterns, pollution sources as well as differentiate between natural and non-natural inputs, presenting an alternative approach for environmental quality assessments.
Περιγραφή
Λέξεις-κλειδιά
phosphorous, fractionation, bioavailability, sediment quality, explanatory statistics, monitoring, water-quality, fluvial sediment, bed-sediments, land-use, lake, dynamics, greece, forms, uk, phosphate
Θεματική κατηγορία
Παραπομπή
Σύνδεσμος
<Go to ISI>://000248636500039
http://ac.els-cdn.com/S0011916407003335/1-s2.0-S0011916407003335-main.pdf?_tid=df0668d2-356a-11e3-b0a6-00000aab0f27&acdnat=1381822067_0f3d93de84ae7b08f060f64aef92628f
http://ac.els-cdn.com/S0011916407003335/1-s2.0-S0011916407003335-main.pdf?_tid=df0668d2-356a-11e3-b0a6-00000aab0f27&acdnat=1381822067_0f3d93de84ae7b08f060f64aef92628f
Γλώσσα
en
Εκδίδον τμήμα/τομέας
Όνομα επιβλέποντος
Εξεταστική επιτροπή
Γενική Περιγραφή / Σχόλια
Ίδρυμα και Σχολή/Τμήμα του υποβάλλοντος
Πανεπιστήμιο Ιωαννίνων. Σχολή Θετικών Επιστημών. Τμήμα Χημείας