IAHR, founded in 1935, is a worldwide independent member-based organisation of engineers and water specialists working in fields related to the hydro-environmental sciences and their practical application. Activities range from river and maritime hydraulics to water resources development and eco-hydraulics, through to ice engineering, hydroinformatics, and hydraulic machinery.
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You are here : eLibrary : IAHR World Congress Proceedings : 34th Congress - Brisbane (2011) : THEME 5: Environmental Hydraulics and Hydrology : Substantially better than nothing: a case study of an initial environmental flows assessment establi...
Substantially better than nothing: a case study of an initial environmental flows assessment establishing instream flow requirements for an ephemeral, pristine stream in australia
Author : G. Hadzilacos1, ML. Ng1, K. Taske1, A. Small1 and B. Loney2
Mining operations have a high potential to alter ecological processes, including flow patterns of natural waterways. Alteration of flow patterns may have an irreversible impact on ecosystems dependent on the timing, duration and frequency of these flows. As part of an Environmental Impact Study, carried out for a proposed mining operation in Australia, an appropriate waterway management scheme was proposed that required the establishment of measurable instream flow requirements. This paper describes an environmental flow analysis (EFA) carried out to identify flow regimes that achieve the desired ecological outcomes for the affected waterways. The EFA methodology was based on the range-of-variability approach using a calibrated rainfall-runoff model to form the hydrologic basis. The study established a relationship between flow components and ecological variables based upon which the flow requirements were estimated. The paper discusses the validity of such an approach for the assessment of ecological change.
File Size : 579,632 bytes
File Type : Adobe Acrobat Document
Chapter : IAHR World Congress Proceedings
Category : 34th Congress - Brisbane (2011)
Article : THEME 5: Environmental Hydraulics and Hydrology
Date Published : 01/07/2011
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