A Comprehensive System for the Exploration and Analysis of Hydrological Data

George Tsakalias and Demetris Koutsoyiannis ()

Water Resources Management: An International Journal, Published for the European Water Resources Association (EWRA), 1999, vol. 13, issue 4, 269-302

Abstract: A new approach is developed for the automatic (computer based) exploration and analysis of hydrological data, particularly focused on the identification of shifting relationships among hydrological variables. The methodology developed is applicable to many hydrological problems, such as identification of multiple stage-discharge relationships in a river section, data homogeneity analysis, analysis of temporal consistency of hydrological data, detection of outliers, and determination of shifts and trends in hydrological time series. Such problems are examined here as particular applications of the single methodology developed. A general mathematical representation of the data exploration problem is initially proposed, based on set theory considerations. Several statistical tests, as well as auxiliary information of physical conditions, are systematically combined to form an objective function to be optimised. This objective function represents the performance of a solution, (where a solution is a specific partitioning of a data set into subperiods), in a manner, that holds in each subperiod a single relationship among data values. It is shown that an exhaustive search of all candidate solutions is intractable. Therefore, a heuristic algorithm is proposed, which emulates the exploratory data analysis of the human expert. This algorithm encodes a number of search strategies in a pattern directed computer program and results in an automatic determination of a satisfactory solution. Copyright Kluwer Academic Publishers 1999

Keywords: blackboard systems; consistency of hydrological data; exploratory data analysis; heuristic algorithms; homogeneity of hydrological data; hydrological data processing; pattern directed programming; river stage-discharge relationships; statistical tests (search for similar items in EconPapers)
Date: 1999
References: View complete reference list from CitEc
Citations:

Downloads: (external link)
http://hdl.handle.net/10.1023/A:1008197511426 (text/html)
Access to full text is restricted to subscribers.

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:spr:waterr:v:13:y:1999:i:4:p:269-302

Ordering information: This journal article can be ordered from
http://www.springer.com/economics/journal/11269

DOI: 10.1023/A:1008197511426

Access Statistics for this article

Water Resources Management: An International Journal, Published for the European Water Resources Association (EWRA) is currently edited by G. Tsakiris

More articles in Water Resources Management: An International Journal, Published for the European Water Resources Association (EWRA) from Springer, European Water Resources Association (EWRA)
Bibliographic data for series maintained by Sonal Shukla () and Springer Nature Abstracting and Indexing ().