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 : Hyporheic flow caused by bar morphology on chum salmon spawning area
Hyporheic flow caused by bar morphology on chum salmon spawning area
Author : MASAAKI YANO(1), YASUHARU WATANABE(2), KOUKI SUGIHARA(1), KAZUYOSHI WATANABE(1) & YASUYUKI HIRAI(1)
ABSTRACT
To understand relationship among bar morphology, hyporheic flow and chum salmon spawning environment, the cross
sectional profile, simultaneous water level distribution around bar and hypoheic flow were surveyed. Numeric calculation
was also conducted to understand hyporheic flow path. The results revealed that a river water elevation difference
between bar crest and front, generates welling up hyporheic flow around bar front. Numeric calculation also revealed flow
path of hyporheic flow which sink into river bed on the bar crest and well up on the bar front. Spawning redds were mainly
found around bar front where hyporheic flow well up. Thereby, we conclude that bar morphology contribute generating suit
hypoheic flow for spawning environment on bar front.
File Size : 1,823,933 bytes
File Type : Adobe Acrobat Document
Chapter : IAHR World Congress Proceedings
Category : 36th Congress - The Hague (2015) ALL CONTENT
Article : Hydro-environment
Date Published : 17/08/2015
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