Estimation of suspended sediment loads using copula functions

Bezak, Nejc (author), Rusjan, Simon (author), Kramar Fijavž, Marjeta (author), Mikoš, Matjaž (author), Šraj, Mojca (author)

Suspended sediment load (SSL) observations are usually less frequent than precipitation and river discharge measurements; therefore a reliable procedure is needed for the estimation of SSL. One year of precipitation, SSL, and discharge measurements at 20-min intervals were performed at the Kuzlovec torrent in Slovenia. The Frank copula was selected to construct an event-based model using the following variables: precipitation sum (P), peak discharge (Q), and SSL. The idea was to estimate the SSL based on the measured P and Q. The proposed model was additionally tested using the daily data from the Gornja Radgona station on the Mura River, for which 29 years of data were available and where Khoudraji-Liebscher copulas were used. The estimated SSL values using the copula were compared with different regression models. The proposed copula model yielded meaningful SSL estimates. Some performance criteria and tests indicated that the copula model gives a better fit to the measured data than other tested methods.

• Language: English
• Keywords: turbidity, extremes, copula, torrent, multivariate approach, sediments
• Work type: Article
• Typology: 1.01 - Original Scientific Article
• Organization: FGG - Faculty of Civil and Geodetic Engineering
• Publication status: Published
• Publication version: Version of Record
• Year: 2017
• Number of pages: 23 str.
• Numbering: Vol. 9, iss. 8, art. 628
• PID: 20.500.12556/RUL-131074
• UDC: 556.5(497.4)
• ISSN on article: 2073-4441
• DOI: 10.3390/w9080628
• COBISS.SI-ID: 8124769
• Publication date in RUL: 22.09.2021

Record is a part of a journal

• Title: Water
• Shortened title: Water
• Publisher: Molecular Diversity Preservation International - MDPI
• ISSN: 2073-4441
• COBISS.SI-ID: 36731653

Licences

• License: CC BY 4.0, Creative Commons Attribution 4.0 International
• Link: http://creativecommons.org/licenses/by/4.0/
• Description: This is the standard Creative Commons license that gives others maximum freedom to do what they want with the work as long as they credit the author.
• Licensing start date: 22.08.2017

Secondary language

• Language: Slovenian
• Keywords: motnost, ekstremni dogodki, funkcija kopula, hudournik, multivarianten pristop, sedimenti

Projects

• Funder: ARRS - Slovenian Research Agency
• Project number: J2-7322
• Name: Modeliranje hidrološkega odziva nehomogenih povodij

• Funder: ARRS - Slovenian Research Agency
• Project number: P2-0180
• Name: Vodarstvo in geotehnika: orodja in metode za analize in simulacije procesov ter razvoj tehnologij