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Hydraulics of simple habitat structu...

Shamloo, Hamid.

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Hydraulics of simple habitat structures in open channels.

紀錄類型:	書目-電子資源 : Monograph/item
正題名/作者:	Hydraulics of simple habitat structures in open channels./
作者:	Shamloo, Hamid.
面頁冊數:	342 p.
附註:	Source: Dissertation Abstracts International, Volume: 58-09, Section: B, page: 4538.
Contained By:	Dissertation Abstracts International58-09B.
標題:	Agriculture, Fisheries and Aquaculture. -
電子資源:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=NQ21631
ISBN:	0612216314

Hydraulics of simple habitat structures in open channels.
Shamloo, Hamid.

Hydraulics of simple habitat structures in open channels. - 342 p.

Source: Dissertation Abstracts International, Volume: 58-09, Section: B, page: 4538.

Thesis (Ph.D.)--University of Alberta (Canada), 1997.

Study of the hydraulics of fish habitat structures in rivers, such as the wakes of big rocks in shallow open channel flow, can lead to a better design for these structures. The wakes of simplified obstacles like hemispheres have been studied, including the structure of the flow and the scour around such obstacles. Based on the behaviour of the free surface, four regimes of flow for different relative depths, ratio of flow depth d to body height h, have been recognized and the systems of vortices active in each regime were defined and studied.

ISBN: 0612216314Subjects--Topical Terms:

1020913
Agriculture, Fisheries and Aquaculture.

Hydraulics of simple habitat structures in open channels.
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245 1 0 $a Hydraulics of simple habitat structures in open channels.
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500 $a Source: Dissertation Abstracts International, Volume: 58-09, Section: B, page: 4538.
500 $a Adviser: N. Rajaratnam.
502 $a Thesis (Ph.D.)--University of Alberta (Canada), 1997.
520 $a Study of the hydraulics of fish habitat structures in rivers, such as the wakes of big rocks in shallow open channel flow, can lead to a better design for these structures. The wakes of simplified obstacles like hemispheres have been studied, including the structure of the flow and the scour around such obstacles. Based on the behaviour of the free surface, four regimes of flow for different relative depths, ratio of flow depth d to body height h, have been recognized and the systems of vortices active in each regime were defined and studied.
520 $a Velocity field in the longitudinal and transverse directions was measured on smooth and rough (mobile and rigid) beds. Flow regimes with the relative depth d/h $< $1 .3 had wider wakes and different scour patterns. The extent of the horse-shoe vortex and downwash of the flow from the top of the body could be found by velocity measurements. Bed shear stress measurements in smooth and rough beds indicated a significant increase in former one. The scour profiles measured at consecutive times prior to the equlibrium state at the sides and in front of the obstacle were found to be similar at different times and from experiment to experiment and could be related to the depth of scour. Other body shapes such as cubes and natural rocks were also examined. The shape of the scour pattern and its geometry downstream of the body were found to be a function of the flow regime and the shape of the body.
520 $a The analysis of velocity profiles behind the body at the plane of symmetry and the transverse direction was satisfactory for a limited distance. Several pier scour prediction methods were examined to determine if they can be used for predicting the scour depth for simple habitat structures. It was found that these methods overestimate the depth of scour for these structures for the relative depths studied and these would have to be revised to predict the scour for habitat structures. It is recommended that further investigations be performed to study the effects of different parameters on the scour of single rocks as well as rock clusters.
590 $a School code: 0351.
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792 $a 1997
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