#

Total sediment transport in the lower reaches of river Þjórsá : results from the year 2003

Skoða fulla færslu

Titill: Total sediment transport in the lower reaches of river Þjórsá : results from the year 2003Total sediment transport in the lower reaches of river Þjórsá : results from the year 2003
Höfundur: Jórunn Harðardóttir 1968 ; Svava Björk Þorláksdóttir 1975 ; Orkustofnun. Vatnamælingar. ; Landsvirkjun
URI: http://hdl.handle.net/10802/19307
Útgefandi: Orkustofnun
Útgáfa: 2004
Ritröð: OS ;
Efnisorð: Þjórsá; Krókur (Rangárvallasýsla); Urriðafoss; Þjórsártún (býli); Vhm 30 (vatnshæðarmælir)
Tungumál: Íslenska
Tengd vefsíðuslóð: http://www.os.is/gogn/Skyrslur/OS-2004/OS-2004-011.pdf
Tegund: Bók
Gegnir ID: 001515001
Athugasemdir: Prepared for Landsvirkjun.Myndefni: myndir, töflur, línurit.
Útdráttur: This report introduces results from a comprehensive sediment sampling program in the lower reaches of river Þjórsá that was initiated in 2001. This year, suspended sediment samples were taken in five sampling campaigns from cableways at Krókur and Urriðafoss and from beneath the old bridge on Highway 1. In four of these campaigns bedload samples were also obtained at Krókur. The main objectives of the program is to get more suspended sediment samples from the lower reaches of Þjórsá, evaluate the older suspended samples taken at this site by taking comparison samples, and obtain some estimation of bedload transport in lower Þjórsá. The total concentration and grain size of suspended samples varies greatly between campaigns, but tend to increase with discharge, especiallly the bridge samples. Those and the Krókur samples appear to underestimate the concentration of total sediment and the coasest size fraction (>0.2mm) compared to samples taken at the Urriðafoss cableway. Bedload transport was highest at the 50 to 80 m stations and total transport was from 1.7 to 16.5 kg/ (values adjusted by extra sampling). The bedload material was mainly medium and coarse grained samd with pebbles smaller tha -5.0 ö.


Skrár

Skrá Stærð Skráartegund Skoða Lýsing
OS-2004-011.pdf 1.462Mb PDF Skoða/Opna Heildartexti

Þetta verk birtist í eftirfarandi flokki:

Skoða fulla færslu

Leita


Fletta