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.
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You are here : eLibrary : IAHR World Congress Proceedings : 36th Congress - The Hague (2015) ALL CONTENT : Hydro-environment : Daily eco-hydrograph determination method based on fish spawning habitat
Daily eco-hydrograph determination method based on fish spawning habitat
Global conflict over water has become increasingly prominent. In China, to meet the great demand of water use for
economic growth, numbers of hydro-projects have been set up, which alter the natural hydrological regime of rivers, and
exert profound impact on aquatic ecosystem. Therefore, an elaborated method of eco-hydrograph determination has
been in great necessity for both maintaining river health and maximizing economic benefit. This research put forward an
innovative method for river eco-hydrograph determination with fish spawning habitat as the protected objective. An
integrated hydro-environmental-habitat model was developed and applied in the water reduced segment due to water
diversion generating of Yalong River Big Bend, Sichuan Province, China. Schizothoracinae, the dominated and
commercial indigenous fish, was selected as target species. Different from previous research, the impacts of
fragmentation and water level variation on fish habitat were analyzed focused on fish spawning period, as well as
suitability. Eco-hydrograph for different preservation level of Schizothoracinae spawning habitat was estimated and the
optimal one has been recommended according to the developed model. Compared with traditional hydrological and
hydraulic methods, the innovative habitat method was not only able to determine ecological water demand of species
accurately, but maximize the quantity of water for power generation.
File Size : 686,396 bytes
File Type : Adobe Acrobat Document
Chapter : IAHR World Congress Proceedings
Category : 36th Congress - The Hague (2015) ALL CONTENT
Article : Hydro-environment
Date Published : 18/08/2015
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