Analysis of Environmental Issues Related to Small-scale Hydroelectric Development VI
Author: Glenn F. Cada
Publisher:
Published: 1982
Total Pages: 106
ISBN-13:
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Author: Glenn F. Cada
Publisher:
Published: 1982
Total Pages: 106
ISBN-13:
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Publisher:
Published: 1980
Total Pages: 144
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DOWNLOAD EBOOKAuthor: J. M. Loar
Publisher:
Published: 1980
Total Pages: 152
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DOWNLOAD EBOOKAuthor: S. G. Hildebrand
Publisher:
Published: 1980
Total Pages: 94
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Published: 1982
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DOWNLOAD EBOOKResults are presented of an effort aimed at determining whether or not water quality degradation, as exemplified by dissolved oxygen concentrations, is a potentially significant issue affecting small-scale hydropower development in the US. The approach was to pair operating hydroelectric sites of all sizes with dissolved oxygen measurements from nearby downstream US Geological Survey water quality stations (acquired from the WATSTORE data base). The USGS data were used to calculate probabilities of non-compliance (PNCs), i.e., the probabilities that dissolved oxygen concentrations in the discharge waters of operating hydroelectric dams will drop below 5 mg/l. PNCs were estimated for each site, season (summer vs remaining months), and capacity category (less than or equal to 30 MW vs>30 MW). Because of the low numbers of usable sites in many states, much of the subsequent analysis was conducted on a regional basis. During the winter months (November through June) all regions had low mean PNCs regardless of capacity. Most regions had higher mean PNCs in summer than in winter, and summer PNCs were greater for large-scale than for small-scale sites. Among regions, the highest mean summer PNCs were found in the Great Basin, the Southeast, and the Ohio Valley. To obtain a more comprehensive picture of the effects of season and capacity on potential dissolved oxygen problems, cumulative probability distributions of PNC were developed for selected regions. This analysis indicates that low dissolved oxygen concentrations in the tailwaters below operating hydroelectric projects are a problem largely confined to large-scale facilities.
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Published: 1980
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DOWNLOAD EBOOKAuthor: Susan C. Turbak
Publisher:
Published: 1981
Total Pages: 128
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Published: 1980
Total Pages:
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DOWNLOAD EBOOKAuthor: J. M. Loar
Publisher:
Published: 1981
Total Pages: 142
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Published: 1981
Total Pages:
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DOWNLOAD EBOOKThe purpose of this report is to provide summary information for use by potential developers and regulators of small-scale hydroelectric projects (defined as existing dams that can be retrofitted to a total site capacity of ≤30 MW), where turbine-related mortality of fish is a potential issue affecting site-specific development. Mitigation techniques for turbine-related mortality are not covered in this report.