Modelling of sediment transport and deposition in reservoir Norðursjór, Iceland
(2011) In TVVR11/5004 VVR820 20082Division of Water Resources Engineering
- Abstract
- The objective of the study was to analyse the sediment load into the reservoir Norðursjór, which would form in the case of a dam construction in Vestari kvísl, an upstream part of the river Skaftá, in southern Iceland. The main part of the problem studied was to quantify the sediment transported into the reservoir Norðursjór and to model the bed elevation change of the reservoir as a result of this transport. Hydrologic and sediment data from sampling stations along the Skaftá river were used to make a hydrodynamic record and sediment rating curve employed as model input. The procedure followed to solve the main issues of the study was to make a geographic model of the reservoir using ArcGIS combined with HEC-GeoRAS mapping techniques by... (More)
- The objective of the study was to analyse the sediment load into the reservoir Norðursjór, which would form in the case of a dam construction in Vestari kvísl, an upstream part of the river Skaftá, in southern Iceland. The main part of the problem studied was to quantify the sediment transported into the reservoir Norðursjór and to model the bed elevation change of the reservoir as a result of this transport. Hydrologic and sediment data from sampling stations along the Skaftá river were used to make a hydrodynamic record and sediment rating curve employed as model input. The procedure followed to solve the main issues of the study was to make a geographic model of the reservoir using ArcGIS combined with HEC-GeoRAS mapping techniques by extracting cross-sectional data from a digital elevation model of the reservoir area. The geographic model was imported into HEC-RAS where the sediment transport and hydraulic modelling was performed. Four different scenarios were studied with the results giving sediment deposition from 1.2 million tons per year up to 2.9 million tons per year. The rate of sedimentation in the reservoir showed that almost half of the storage capacity was lost after 20 years of regular flow not considering jökulhlaups. In a best case scenario the model suggests a life time of the reservoir of 40 ± 20 years, although the addition of frequent jökulhlaups would greatly shorten this estimation. (Less)
Please use this url to cite or link to this publication:
http://lup.lub.lu.se/student-papers/record/2203094
- author
- Georgsdottir, Linda LU
- supervisor
- organization
- course
- VVR820 20082
- year
- 2011
- type
- H2 - Master's Degree (Two Years)
- subject
- publication/series
- TVVR11/5004
- report number
- 11/5004
- ISSN
- 1101-9824
- language
- English
- additional info
- Examiner: Lars Bengtsson
- id
- 2203094
- date added to LUP
- 2011-11-10 16:29:26
- date last changed
- 2019-03-27 15:25:28
@misc{2203094, abstract = {{The objective of the study was to analyse the sediment load into the reservoir Norðursjór, which would form in the case of a dam construction in Vestari kvísl, an upstream part of the river Skaftá, in southern Iceland. The main part of the problem studied was to quantify the sediment transported into the reservoir Norðursjór and to model the bed elevation change of the reservoir as a result of this transport. Hydrologic and sediment data from sampling stations along the Skaftá river were used to make a hydrodynamic record and sediment rating curve employed as model input. The procedure followed to solve the main issues of the study was to make a geographic model of the reservoir using ArcGIS combined with HEC-GeoRAS mapping techniques by extracting cross-sectional data from a digital elevation model of the reservoir area. The geographic model was imported into HEC-RAS where the sediment transport and hydraulic modelling was performed. Four different scenarios were studied with the results giving sediment deposition from 1.2 million tons per year up to 2.9 million tons per year. The rate of sedimentation in the reservoir showed that almost half of the storage capacity was lost after 20 years of regular flow not considering jökulhlaups. In a best case scenario the model suggests a life time of the reservoir of 40 ± 20 years, although the addition of frequent jökulhlaups would greatly shorten this estimation.}}, author = {{Georgsdottir, Linda}}, issn = {{1101-9824}}, language = {{eng}}, note = {{Student Paper}}, series = {{TVVR11/5004}}, title = {{Modelling of sediment transport and deposition in reservoir Norðursjór, Iceland}}, year = {{2011}}, }