However, significant flood risk remains for Calgary until upstream mitigation is built. We help our clients through the process of identifying potential failure modes, evaluating the likelihood of failure, potential consequences, and the adequacy of in-place control measures; developing reasonable risk-reduction methods, and providing input to prioritize action plans. The Flood Mitigation Measures Assessment showed: • Investment in flood mitigation in Calgary has decreased flood damage risk by 30 per cent. During construction, environmental protection and mitigation involves implementation of standard construction practices, conformance with commitments made during the environmental assessment process, and recognition of additional control measures that may be identified through good construction environmental practice.
It is found that the peak outflow rate could be reduced from the recorded 6500 m3/s to 2900 m3/s using the optimal design. This dam Construction of a spillway across a dam or an adjacent abutment is the most common long-term measure for landslide dam risk mitigation. Previous affiliation: Department of Civil and Environmental Engineering, The Hong Kong University of Science and Technology, Hong Kong. An optimization method is proposed and applied to the spillway design for the Tangjiashan landslide dam, which is the largest one caused by the Wenchuan earthquake. © Copyright 2020 International Rivers | Privacy Policy, Designing Low Carbon Electricity Futures for African and Other Developing Countries (2015), Report | Reckless Endangerment: Assessing Responsibility for the Xe Pian-Xe Namnoy Dam Collapse (2019), State of Knowledge: Women and Rivers in the Mekong Region. Specific assessments and related actions that can be taken by stakeholders are described in the paragraphs that Regulations, such as those in the US, which insist that dams include mitigation measures can therefore render many projects uneconomic (especially as the economic viability of most dam projects at present is marginal at best). A spillway with a shallow and broad cross section is suitable for low-erodibility dams, while a spillway with a deep and narrow cross section is suitable for high-erodibility dams. This paper aims to summarize the engineering measures taken to mitigate the landslide-dam risks; provide a method for optimal design of spillways to minimize the risks; and quantitatively evaluate practical options for spillway design with a physically-based dam breach model. A spillway with a large longitudinal gradient is beneficial for high-erodibility dams with large dam widths and gentle downstream dam slopes. %PDF-1.6
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These changes and mitigation measures in design require structural analyses for estimating and comparing their effectiveness. International Rivers protects rivers and defends the rights of communities that depend on them. A method for optimal design of spillways for landslide dams has been proposed. endstream
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DR-4285-NC / DR-4286-SC TA – 1: Risk Reduction Measures for Dams (December 2017) Page 3 other pre-event actions described in this advisory, including planning, mitigation, capital improvement, and dam- specific actions. h�\��N�0EeV�H)qB�KU���TQ$6�L�ic��������%��3]�s.�1�N�s��`A�k�i��dd�RC�A��Y��"[�aM,�WG�~dB����Q�_�"��H�4���HL��8���_e�m�����1$ l,óe�wԿ�G�nw��:9DG��i#h��[��lP�S�]sd[k��l�o�we�%��� �*|GV�j��kW�_�Z��$��YN�����e��#�lI More than 257 sizable landslide dams were induced by the 2008 Wenchuan earthquake, which required timely risk mitigation measures. Practical options for spillway design are quantitatively evaluated using DABA. 1172 0 obj
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The engineering measures for mitigating the risks of these dams are reviewed. ScienceDirect ® is a registered trademark of Elsevier B.V. ScienceDirect ® is a registered trademark of Elsevier B.V. Engineering risk mitigation measures for the landslide dams induced by the 2008 Wenchuan earthquake. Although the loss of species is not solely a consequence of dams, they are one of the principal factors. Mitigation measures generally reduce the amount of electricity and water which can be provided by dams and increases their construction and running costs. A spillway may be designed to be erosion-resistant for preventing rapid breaching with a large flood. Transforming Power: a gender guide for organizations campaigning on dams and for rivers. In some cases, ... design, construction, operation to minimise or eliminate impacts Used as a last resort to offset impacts 6 7. Copyright © 2020 Elsevier B.V. or its licensors or contributors. • The Province’s Springbank Off-Stream Reservoir project and improved Glenmore Dam gates will �@lc��_�W�`h�R
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