Normal Flow Conditions: Difference between revisions
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'''Normal Streamflow Conditions''' | '''Normal Streamflow Conditions''' | ||
“Water quality releases for downstream control have both qualitative and quantitative requirements. The quality aspects relate to Corp’s policy and objectives to meet state water quality standards, maintain present water quality where standards are exceeded, and maintain an acceptable tailwater habitats for aquatic life... One of the most important measures of quality is quantity. At many projects authorized for water quality control, a minimum flow at some downstream control point is the primary water quality objective. Other common objectives include temperature, dissolved oxygen, and turbidity targets at downstream locations”.<ref name="EM 1110-2-1420" /> | “Water quality releases for downstream control have both qualitative and quantitative requirements. The quality aspects relate to Corp’s policy and objectives to meet state water quality standards, maintain present water quality where standards are exceeded, and maintain an acceptable tailwater habitats for aquatic life... One of the most important measures of quality is quantity. At many projects authorized for water quality control, a minimum flow at some downstream control point is the primary water quality objective. Other common objectives include temperature, dissolved oxygen, and turbidity targets at downstream locations”.<ref name="EM 1110-2-1420">[[Hydrologic Engineering Requirements for Reservoirs (EM 1110-2-1420) | EM 1110-2-1420 Hydrologic Engineering Requirements for Reservoirs, USACE, 1997]]</ref> | ||
'''Reservoir Drawdown''' | '''Reservoir Drawdown''' | ||
“Where practicable, reservoir release facilities should be provided to lower the pool to a safe level adequate to correct conditions that might threaten the integrity f the dam”.<ref name="FEMA94" /> | “Where practicable, reservoir release facilities should be provided to lower the pool to a safe level adequate to correct conditions that might threaten the integrity f the dam”.<ref name="FEMA94">[[Selecting and Accommodating Inflow Design Floods for Dams (FEMA P-94) | FEMA P-94 Federal Guidelines for Dam Safety: Selecting and Accommodating Inflow Design Floods for Dams, FEMA, 2013]]</ref> | ||
“Low level outlets are provided to maintain downstream flows for all levels of the reservoirs operational pool. The outlets may also serve to empty the reservoir to permit inspection, to make needed repairs, or to maintain the upstream face of the dam or other structures normally inundated”.<ref name="EM 1110-2-1420" /> | “Low level outlets are provided to maintain downstream flows for all levels of the reservoirs operational pool. The outlets may also serve to empty the reservoir to permit inspection, to make needed repairs, or to maintain the upstream face of the dam or other structures normally inundated”.<ref name="EM 1110-2-1420" /> | ||
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{{Website Icon}} | {{Website Icon}} | ||
==Best Practices Resources== | ==Best Practices Resources== | ||
{{Document Icon}} | {{Document Icon}} [[Hydrologic Engineering Requirements for Reservoirs (EM 1110-2-1420)]] | ||
{{Document Icon}} [[Selecting and Accommodating Inflow Design Floods for Dams (FEMA P-94)]] | |||
==Trainings== | ==Trainings== | ||
{{Video Icon}} | {{Video Icon}} | ||
Revision as of 23:21, 8 September 2022
[Paragraph here]
Normal Streamflow Conditions
“Water quality releases for downstream control have both qualitative and quantitative requirements. The quality aspects relate to Corp’s policy and objectives to meet state water quality standards, maintain present water quality where standards are exceeded, and maintain an acceptable tailwater habitats for aquatic life... One of the most important measures of quality is quantity. At many projects authorized for water quality control, a minimum flow at some downstream control point is the primary water quality objective. Other common objectives include temperature, dissolved oxygen, and turbidity targets at downstream locations”.[1]
Reservoir Drawdown
“Where practicable, reservoir release facilities should be provided to lower the pool to a safe level adequate to correct conditions that might threaten the integrity f the dam”.[2]
“Low level outlets are provided to maintain downstream flows for all levels of the reservoirs operational pool. The outlets may also serve to empty the reservoir to permit inspection, to make needed repairs, or to maintain the upstream face of the dam or other structures normally inundated”.[1]
Examples
Best Practices Resources
Hydrologic Engineering Requirements for Reservoirs (EM 1110-2-1420)
Selecting and Accommodating Inflow Design Floods for Dams (FEMA P-94)
Trainings
Citations:
Revision ID: 2619
Revision Date: 09/08/2022