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91.
Cardoso-Silva Sheila Frascareli Daniele Silva Daniel C. V. R. Figueira Rubens César Lopes Bittencourt Marisa Dantas Moschini-Carlos Viviane Pompêo Marcelo 《Environmental science and pollution research international》2021,28(13):16029-16041
Environmental Science and Pollution Research - The establishment of reference conditions and typology are two important steps in water resources management. The reference conditions enable the... 相似文献
92.
This is a study of the scientific component of an effort to restore an urban river by removing a low-head dam. The Secor Dam
is owned by a local government entity near Toledo, Ohio. The proposed removal of the last structure impeding flow on the Ottawa
River has broad appeal, but the owner is concerned about liability issues, particularly potential changes to the flood regime,
the presence of contaminated sediments behind the dam, and possible downstream transport of reservoir sediments. Assessing
sediment contamination involved sediment sampling and analysis of trace metals and organic contaminants. Forecasting sediment
transport involved field methods to determine the volume and textural properties of reservoir and upstream sediment and calculations
to determine the fate of reservoir sediments. Forecasting changes in the flood regime involved HEC-RAS hydrological models
to determine before and after dam removal flood scenarios using LiDAR data imported into an ArcGIS database. The resulting
assessment found potential sediment contamination to be minor, and modeling showed that the removal of the dam would have
minimal impacts on sediment transport and flood hazards. Based on the assessment, the removal of the dam has been approved
by its owners. 相似文献