FLOW STRUCTURE AND SAFE REGION FOR FISH HABITAT IN RIVERS

Keshavarzy, A; Ball, JE; Moghadam, MK

FLOW STRUCTURE AND SAFE REGION FOR FISH HABITAT IN RIVERS

Keshavarzy, A Ball, JE

Moghadam, MK

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Publisher:: IAHR
Publication Type:: Conference Proceeding
Citation:: 9th International Symposium on Ecohydraulics 2012, 2012, pp. 1 - 8
Issue Date:: 2012-01

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Field	Value	Language
dc.contributor.author	Keshavarzy, A	en_US
dc.contributor.author	Ball, JE https://orcid.org/0000-0001-8342-1916	en_US
dc.contributor.author	Moghadam, MK	en_US
dc.contributor.editor	Mader, H	en_US
dc.contributor.editor	Kraml, J	en_US
dc.date	2012-09-17	en_US
dc.date.issued	2012-01	en_US
dc.identifier.citation	9th International Symposium on Ecohydraulics 2012, 2012, pp. 1 - 8	en_US
dc.identifier.isbn	978-3-200-02862-3	en_US
dc.identifier.uri	http://hdl.handle.net/10453/31537
dc.description.abstract	In large rivers, the life of animals including fish is at risk due to establishment of some hydraulic structures like dams and weirs. Few fish habitat activities including the installation of rocks, rock clusters, rock weirs and other instream works have been done in rivers to minimize the problem. The most important advantage of the habitat structures are their downstream hydraulic condition such as large depth and smaller velocity. These hydraulic conditions provide an area for fish to rest and to feed. In this study, to determine the fish habitat safe region area, evaluations were done in laboratory flume to simulate natural conditions. A quartersphere made of concrete was installed at the bed of flume and then flow velocity in two directions was measured using small electromagnetic velocimeter and PIV. To find the geometry of safe region behind a quarter-sphere the streamlines, contour vectors, location and size of safe region was determined. By drawing the contour lines of velocity and detection of contour vectors, location and size of safe region, it was found that close to the body, the safe region is located adjacent to the bed, and far away from the body. Furthermore, it is concluded that far away from the body, safe region is located in upper depths and by moving toward body peak, safe region area decreases.	en_US
dc.publisher	IAHR	en_US
dc.relation.ispartof	9th International Symposium on Ecohydraulics 2012	en_US
dc.relation.ispartof	International Symposium on Ecohydraulics	en_US
dc.title	FLOW STRUCTURE AND SAFE REGION FOR FISH HABITAT IN RIVERS	en_US
dc.type	Conference Proceeding
utslib.location	Boku	en_US
utslib.location.activity	Austria	en_US
utslib.for	0502 Environmental Science and Management	en_US
dc.location.activity	Austria
pubs.embargo.period	Not known	en_US
pubs.organisational-group	/University of Technology Sydney
pubs.organisational-group	/University of Technology Sydney/Faculty of Engineering and Information Technology
pubs.organisational-group	/University of Technology Sydney/Faculty of Engineering and Information Technology/School of Civil and Environmental Engineering
pubs.organisational-group	/University of Technology Sydney/Strength - CTWW - Centre for Technology in Water and Wastewater Treatment
utslib.copyright.status	closed_access
pubs.consider-herdc	true	en_US
pubs.finish-date	2012-09-22	en_US
pubs.place-of-publication	Boku	en_US
pubs.publication-status	Published	en_US
pubs.start-date	2012-09-17	en_US

Abstract:

In large rivers, the life of animals including fish is at risk due to establishment of some hydraulic structures like dams and weirs. Few fish habitat activities including the installation of rocks, rock clusters, rock weirs and other instream works have been done in rivers to minimize the problem. The most important advantage of the habitat structures are their downstream hydraulic condition such as large depth and smaller velocity. These hydraulic conditions provide an area for fish to rest and to feed. In this study, to determine the fish habitat safe region area, evaluations were done in laboratory flume to simulate natural conditions. A quartersphere made of concrete was installed at the bed of flume and then flow velocity in two directions was measured using small electromagnetic velocimeter and PIV. To find the geometry of safe region behind a quarter-sphere the streamlines, contour vectors, location and size of safe region was determined. By drawing the contour lines of velocity and detection of contour vectors, location and size of safe region, it was found that close to the body, the safe region is located adjacent to the bed, and far away from the body. Furthermore, it is concluded that far away from the body, safe region is located in upper depths and by moving toward body peak, safe region area decreases.

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http://hdl.handle.net/10453/31537