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Student Disclaimer The work comprising this project report is substantially my own and to the extent that any part of this work is not my own I have indicated that it is not my own by acknowledging the source of that part or those parts of the work I have read and understood the University of Sydney Student Plagiarism Coursework Procedure I understand that failure to comply with the University of Sydney Student Plagiarism Coursework Policy and Procedure can lead to the University commencing proceeding against me for potential student misconduct under chapter 8 of the University of Sydney By-Law 1999 as amendedIntroduction11 BackgroundThe procedure of nature remaking of human are always inevitably accompanied by the influences to the ecological environment Roads and railways are built for transportation they definitely bring conveniences on the other hand some species are suffering silently from the relevant constructions of these such as culverts The main purpose of building a culvert under road is to allow water to drain inside it rather than pooling on top of the road Obviously with large amounts of water flowing it will be unsafe for cars running on it and will conceal hazards After putting a culvert into a river the water velocities will definitely increase with the reduction in stream width for the part which passes through the culvert As a result it creates a high water velocity area in which some species of fauna usually fishes cannot pass through successfully upstream Or in some cases the water depth within that area decreases down to a level making fishes hard to pass These circumstances may greatly restrict their ability to reproduce upstream resulting possibility of reduction in population of some species or even dying out With the study of such phenomenon fishway arises to save those innocent fishesFishway is a structure built to help fish overcome their artificial migration barriers such as dams and weirsRoss Kapizke 2010 The design of fishway is
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