IAHR, founded in 1935, is a worldwide independent member-based organisation of engineers and water specialists working in fields related to the hydro-environmental sciences and their practical application. Activities range from river and maritime hydraulics to water resources development and eco-hydraulics, through to ice engineering, hydroinformatics, and hydraulic machinery.
Log On
About IAHRDirectoryCommitteesMy IAHRNews & JournalseLibraryeShopEventsJoin IAHRWorld CongressDonate
spacer.gif
spacer.gif eLibrary
spacer.gif eLibrary
You are here : eLibrary : IAHR World Congress Proceedings : 36th Congress - The Hague (2015) ALL CONTENT : Sediment management and morphodynamics : Effects of dam construction on the planimetric changesof downstream rivers
Effects of dam construction on the planimetric changesof downstream rivers
Author : CHALACHEW ABEBE(1), A. CROSATO(2), A. MYNETT(3) & MICHAEL MEHARI(4)
ABSTRACT The construction of dams affects water and sediment supply to the downstream river reach, which then adjustsitself to the new state by changing its slope, planimetry, reference width, and water depth. This work deals with the assessment of the long-term planimetric adaptation of meandering rivers after upstream dam construction. In particular, the work, which is now in its preliminary phase, aims at anticipating the changes that will occur on the meandering Ribb River (Ethiopia) a long time after the completion of the Ribb Dam.To analyze the effects of dams and generalize the results, two additional case studies are considered: the Tana River (Kenya) and the Blue Nile River (Sudan). These two rivers have been affected by dams for a long time already, whereas more dams are planned or in construction. The effects of large dams on these three rivers will be analyzed and compared, and based on the findings a methodology for the prediction of the effects of planned dams on the downstream river planimetry will be developed. The method includes field and historical investigations, GIS, image analysis and numerical modelling.
File Size : 437,559 bytes
File Type : Adobe Acrobat Document
Chapter : IAHR World Congress Proceedings
Category : 36th Congress - The Hague (2015) ALL CONTENT
Article : Sediment management and morphodynamics
Date Published : 28/08/2015
Download Now