OS-2000/070 - Reassessment of suspended sediment load of river Jökulsá á Dal at Hjarðarhagi
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| Title | OS-2000/070 - Reassessment of suspended sediment load of river Jökulsá á Dal at Hjarðarhagi |
| Subtitle | OS-2000/070 |
| Description | The objective of this study is to reassess the suspended sediment load of Jökulsá á Dal. The reassessment is based on improved sampling methodology and comparison with the older methodology. Mean suspended sediment load of Jökulsá á Dal at Hjarðarhagi for the interval 1970-99 is 5.8 million tons per year, but 6.7 million tons per year for the interval 1965-99. This is based on seasonal 5-year-period rating curves. The difference is caused by the surge in Brúarj6kull 1963-64. During 1970-99 about 86% of the load was transported during the interval from July to September. Seventy-two percent of the sediment is classified within the 0.002-0.2 mm grain size range, and 18% coarser than 0.2 mm. According to the calculations the difference in suspended sediment load between Hjarðarhagi and the other sampling site at Brú fits well within the error associated with sediment sampling and discharge measurements. To fully evaluate the sediment transport in Jökulsá á Dal it is very important to continue bedload studies at Hjarðarhagi. |
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| Authors | |
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| Name | Árni Snorrason |
| Name | Guðmundur H. Vigfússon |
| Name | Jórunn Harðardóttir |
| Name | Svanur Pálsson |
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| Category | Gróður |
| Year | 2000 |
| Publisher | Orkustofnunn |
| ISBN | 9979-68-066-0 |
| Keywords | Jökulsá á Dal, discharge, grain size, rating curve, suspended load, sample, sediment, surge |