Low Flow Conditions - Revision history

Mpollei@gfnet.com at 04:54, 21 July 2023

2023-07-21T04:54:36Z

← Older revision		Revision as of 04:54, 21 July 2023
Line 9:		Line 9:

	==Best Practices Resources==		==Best Practices Resources==
	{{Document Icon}} [[National Engineering Handbook: Chapter 5 - Streamflow Data \| National Engineering Handbook: Chapter 5 - Streamflow Data, NRCS~~, 2020~~]]		{{Document Icon}} [[National Engineering Handbook: Chapter 5 - Streamflow Data \| National Engineering Handbook: Chapter 5 - Streamflow Data, NRCS]]

	<!-- For information on notation for in text citations visit https://www.mediawiki.org/wiki/Help:Cite Or simply enclose the citation as shown <ref> citation </ref> in the location of the in text mention. Citations will automatically populate below-->		<!-- For information on notation for in text citations visit https://www.mediawiki.org/wiki/Help:Cite Or simply enclose the citation as shown <ref> citation </ref> in the location of the in text mention. Citations will automatically populate below-->

Rmanwaring at 19:50, 19 December 2022

2022-12-19T19:50:36Z

← Older revision		Revision as of 19:50, 19 December 2022
Line 9:		Line 9:

	==Best Practices Resources==		==Best Practices Resources==
	{{Document Icon}} [[National Engineering Handbook: Chapter 5 - Streamflow Data \| National Engineering Handbook: Chapter 5 - Streamflow Data ~~(Natural Resources Conservation Service)~~]]		{{Document Icon}} [[National Engineering Handbook: Chapter 5 - Streamflow Data \| National Engineering Handbook: Chapter 5 - Streamflow Data, NRCS, 2020]]

	<!-- For information on notation for in text citations visit https://www.mediawiki.org/wiki/Help:Cite Or simply enclose the citation as shown <ref> citation </ref> in the location of the in text mention. Citations will automatically populate below-->		<!-- For information on notation for in text citations visit https://www.mediawiki.org/wiki/Help:Cite Or simply enclose the citation as shown <ref> citation </ref> in the location of the in text mention. Citations will automatically populate below-->

Grichards at 00:12, 13 December 2022

2022-12-13T00:12:29Z

@@ Line 5: / Line 5: @@
 “Continuous low-flow releases are required at some dams to satisfy [[environmental]] objectives, water supply, downstream water rights, etc.”.<ref name="EM 1110-2-1602">[[Hydraulic Design of Reservoir Outlet Works (EM 1110-2-1602) | Hydraulic Design of Reservoir Outlet Works (EM 1110-2-1602), USACE, 1980]]</ref> The following are low flow condition hydrologic analyses relating to dams:
-==Flow Regulation==
+*[[Flow Regulation]]
-“[[Reservoirs]] may improve water quality by merely <noautolinks>permitting</noautolinks> the management of flow. This management may include maintenance of minimum flows, blending selective releases from one or more reservoirs to maintain a given stream quality, and the exclusion of a flow from a system by diversion.<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>
+*[[Water Availability]]
 ==Best Practices Resources==

Grichards at 00:11, 13 December 2022

2022-12-13T00:11:47Z

← Older revision		Revision as of 00:11, 13 December 2022
Line 3:		Line 3:
	----		----
	<!-- Delete any sections that are not necessary to your topic. Add pictures/sections as needed -->		<!-- Delete any sections that are not necessary to your topic. Add pictures/sections as needed -->
	“Continuous low-flow releases are required at some dams to satisfy [[environmental]] objectives, water supply, downstream water rights, etc.”.<ref name="EM 1110-2-1602">[[Hydraulic Design of Reservoir Outlet Works (EM 1110-2-1602) \| Hydraulic Design of Reservoir Outlet Works (EM 1110-2-1602), USACE, 1980]]</ref>		“Continuous low-flow releases are required at some dams to satisfy [[environmental]] objectives, water supply, downstream water rights, etc.”.<ref name="EM 1110-2-1602">[[Hydraulic Design of Reservoir Outlet Works (EM 1110-2-1602) \| Hydraulic Design of Reservoir Outlet Works (EM 1110-2-1602), USACE, 1980]]</ref> The following are low flow condition hydrologic analyses relating to dams:

	==Flow Regulation==		==Flow Regulation==
	“[[Reservoirs]] may improve water quality by merely <noautolinks>permitting</noautolinks> the management of flow. This management may include maintenance of minimum flows, blending selective releases from one or more reservoirs to maintain a given stream quality, and the exclusion of a flow from a system by diversion.<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>		“[[Reservoirs]] may improve water quality by merely <noautolinks>permitting</noautolinks> the management of flow. This management may include maintenance of minimum flows, blending selective releases from one or more reservoirs to maintain a given stream quality, and the exclusion of a flow from a system by diversion.<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>

	“Minimum flow is often maintained in a stream for [[navigation]], [[recreation]], fish and wildlife, and water rights purposes. Such flows may also aid in maintaining acceptable water quality.<ref name="EM 1110-2-1420" />		“Minimum flow is often maintained in a stream for [[navigation]], [[recreation]], fish and wildlife, and water rights purposes. Such flows may also aid in maintaining acceptable water quality.<ref name="EM 1110-2-1420" />

	“There is general agreement that water may be stored and selectively released to help reduce natural water quality problems where source control is not possible, and also that water should not be stored and released solely to improve water quality where similar improvement may be achieved by treatment at the source. The use of a water resource to dilute treatable waste materials is regarded as the misuse of a valuable resource in most cases”.<ref name="EM 1110-2-1420" />		“There is general agreement that water may be stored and selectively released to help reduce natural water quality problems where source control is not possible, and also that water should not be stored and released solely to improve water quality where similar improvement may be achieved by treatment at the source. The use of a water resource to dilute treatable waste materials is regarded as the misuse of a valuable resource in most cases”.<ref name="EM 1110-2-1420" />

Grichards at 00:06, 13 December 2022

2022-12-13T00:06:57Z

← Older revision		Revision as of 00:06, 13 December 2022
Line 21:		Line 21:
	#"Select the appropriate method, one that meets the study objectives and provides reliable information to evaluate results based on accepted criteria.<ref name="EM 1110-2-1420" />		#"Select the appropriate method, one that meets the study objectives and provides reliable information to evaluate results based on accepted criteria.<ref name="EM 1110-2-1420" />
	#"Perform the analysis, evaluate the results, and present the information.”<ref name="EM 1110-2-1420" />		#"Perform the analysis, evaluate the results, and present the information.”<ref name="EM 1110-2-1420" />


	==Best Practices Resources==		==Best Practices Resources==

Grichards at 00:06, 13 December 2022

2022-12-13T00:06:33Z

← Older revision		Revision as of 00:06, 13 December 2022
Line 5:		Line 5:
	“Continuous low-flow releases are required at some dams to satisfy [[environmental]] objectives, water supply, downstream water rights, etc.”.<ref name="EM 1110-2-1602">[[Hydraulic Design of Reservoir Outlet Works (EM 1110-2-1602) \| Hydraulic Design of Reservoir Outlet Works (EM 1110-2-1602), USACE, 1980]]</ref>		“Continuous low-flow releases are required at some dams to satisfy [[environmental]] objectives, water supply, downstream water rights, etc.”.<ref name="EM 1110-2-1602">[[Hydraulic Design of Reservoir Outlet Works (EM 1110-2-1602) \| Hydraulic Design of Reservoir Outlet Works (EM 1110-2-1602), USACE, 1980]]</ref>

			==Flow Regulation==
	“[[Reservoirs]] may improve water quality by merely <noautolinks>permitting</noautolinks> the management of flow. This management may include maintenance of minimum flows, blending selective releases from one or more reservoirs to maintain a given stream quality, and the exclusion of a flow from a system by diversion.<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>		“[[Reservoirs]] may improve water quality by merely <noautolinks>permitting</noautolinks> the management of flow. This management may include maintenance of minimum flows, blending selective releases from one or more reservoirs to maintain a given stream quality, and the exclusion of a flow from a system by diversion.<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>

Line 13:		Line 14:
	“In designing a reservoir to supply water for navigation and low-flow augmentation, the objective is significantly different from objectives for the other purposes that have been discussed previously in this chapter. The objective is to supplement flows at one or more points downstream from the reservoir. For navigation, these flows aid in maintaining the necessary depth of water and alleviate silting problems in the navigable channel. Low-flow augmentation serves a number of purposes including recreation, fish and wildlife, ice control, pollution abatement, and run-of-river power projects. Under certain conditions, low-flow augmentation provides water for the other purposes discussed in this chapter. For instance, if the intake for a municipal and industrial water supply is at some point downstream of the reservoir, the objective may be to supplement low flows at that point”.<ref name="EM 1110-2-1420" />		“In designing a reservoir to supply water for navigation and low-flow augmentation, the objective is significantly different from objectives for the other purposes that have been discussed previously in this chapter. The objective is to supplement flows at one or more points downstream from the reservoir. For navigation, these flows aid in maintaining the necessary depth of water and alleviate silting problems in the navigable channel. Low-flow augmentation serves a number of purposes including recreation, fish and wildlife, ice control, pollution abatement, and run-of-river power projects. Under certain conditions, low-flow augmentation provides water for the other purposes discussed in this chapter. For instance, if the intake for a municipal and industrial water supply is at some point downstream of the reservoir, the objective may be to supplement low flows at that point”.<ref name="EM 1110-2-1420" />

	~~'''~~Water Availability~~'''~~		==Water Availability==
			“The determination of storage-yield relationships for a reservoir project is one of the basic hydrologic analyses for reservoirs. The basic objective can be to determine the reservoir yield given a storage allocation, or find the storage required to obtain a desired yield. The determination follows a traditional [[engineering]] approach:<ref name="EM 1110-2-1420" />
	“The determination of storage-yield relationships for a reservoir project is one of the basic hydrologic analyses for reservoirs. The basic objective can be to determine the reservoir yield given a storage allocation, or ~~fine~~ the storage required to obtain a desired yield. The determination follows a traditional [[engineering]] approach:<ref name="EM 1110-2-1420" />
	#"Determine the study objectives. This includes the project purposes, [[operation]] goals, and the evaluation criteria.<ref name="EM 1110-2-1420" />		#"Determine the study objectives. This includes the project purposes, [[operation]] goals, and the evaluation criteria.<ref name="EM 1110-2-1420" />
	#"Determine the physical and hydrologic constraints for the site. This includes the reservoir storage and outflow capability, as well as the downstream channel system.<ref name="EM 1110-2-1420" />		#"Determine the physical and hydrologic constraints for the site. This includes the reservoir storage and outflow capability, as well as the downstream channel system.<ref name="EM 1110-2-1420" />

Grichards at 23:56, 12 December 2022

2022-12-12T23:56:59Z

← Older revision		Revision as of 23:56, 12 December 2022
Line 5:		Line 5:
	“Continuous low-flow releases are required at some dams to satisfy [[environmental]] objectives, water supply, downstream water rights, etc.”.<ref name="EM 1110-2-1602">[[Hydraulic Design of Reservoir Outlet Works (EM 1110-2-1602) \| Hydraulic Design of Reservoir Outlet Works (EM 1110-2-1602), USACE, 1980]]</ref>		“Continuous low-flow releases are required at some dams to satisfy [[environmental]] objectives, water supply, downstream water rights, etc.”.<ref name="EM 1110-2-1602">[[Hydraulic Design of Reservoir Outlet Works (EM 1110-2-1602) \| Hydraulic Design of Reservoir Outlet Works (EM 1110-2-1602), USACE, 1980]]</ref>

	“[[Reservoirs]] may improve water quality by merely [[permitting]] the management of flow. This management may include maintenance of minimum flows, blending selective releases from one or more reservoirs to maintain a given stream quality, and the exclusion of a flow from a system by diversion.<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>		“[[Reservoirs]] may improve water quality by merely <noautolinks>permitting</noautolinks> the management of flow. This management may include maintenance of minimum flows, blending selective releases from one or more reservoirs to maintain a given stream quality, and the exclusion of a flow from a system by diversion.<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>

	“Minimum flow is often maintained in a stream for [[navigation]], [[recreation]], fish and wildlife, and water rights purposes. Such flows may also aid in maintaining acceptable water quality.<ref name="EM 1110-2-1420" />		“Minimum flow is often maintained in a stream for [[navigation]], [[recreation]], fish and wildlife, and water rights purposes. Such flows may also aid in maintaining acceptable water quality.<ref name="EM 1110-2-1420" />

Grichards at 02:13, 18 November 2022

2022-11-18T02:13:06Z

← Older revision		Revision as of 02:13, 18 November 2022
Line 1:		Line 1:
	__NOTOC__		__NOTOC__
			[[Category:Hydrology]]
	----		----
	<!-- Delete any sections that are not necessary to your topic. Add pictures/sections as needed -->		<!-- Delete any sections that are not necessary to your topic. Add pictures/sections as needed -->

Rmanwaring at 18:05, 28 October 2022

2022-10-28T18:05:58Z

← Older revision		Revision as of 18:05, 28 October 2022
Line 2:		Line 2:
	----		----
	<!-- Delete any sections that are not necessary to your topic. Add pictures/sections as needed -->		<!-- Delete any sections that are not necessary to your topic. Add pictures/sections as needed -->
	“Continuous low-flow releases are required at some dams to satisfy [[environmental]] objectives, water supply, downstream water rights, etc.”.<ref name="EM 1110-2-1602">[[ Hydraulic Design of Reservoir Outlet Works (EM 1110-2-1602) \| Hydraulic Design of Reservoir Outlet Works (EM 1110-2-1602), USACE, 1980]]</ref>		“Continuous low-flow releases are required at some dams to satisfy [[environmental]] objectives, water supply, downstream water rights, etc.”.<ref name="EM 1110-2-1602">[[Hydraulic Design of Reservoir Outlet Works (EM 1110-2-1602) \| Hydraulic Design of Reservoir Outlet Works (EM 1110-2-1602), USACE, 1980]]</ref>

	“[[Reservoirs]] may improve water quality by merely [[permitting]] the management of flow. This management may include maintenance of minimum flows, blending selective releases from one or more reservoirs to maintain a given stream quality, and the exclusion of a flow from a system by diversion.<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>		“[[Reservoirs]] may improve water quality by merely [[permitting]] the management of flow. This management may include maintenance of minimum flows, blending selective releases from one or more reservoirs to maintain a given stream quality, and the exclusion of a flow from a system by diversion.<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>

Rmanwaring at 20:02, 21 October 2022

2022-10-21T20:02:43Z

← Older revision		Revision as of 20:02, 21 October 2022
Line 2:		Line 2:
	----		----
	<!-- Delete any sections that are not necessary to your topic. Add pictures/sections as needed -->		<!-- Delete any sections that are not necessary to your topic. Add pictures/sections as needed -->
	“Continuous low-flow releases are required at some dams to satisfy environmental objectives, water supply, downstream water rights, etc.”.<ref name="EM 1110-2-1602">[[ Hydraulic Design of Reservoir Outlet Works (EM 1110-2-1602) \| Hydraulic Design of Reservoir Outlet Works (EM 1110-2-1602), USACE, 1980]]</ref>		“Continuous low-flow releases are required at some dams to satisfy [[environmental]] objectives, water supply, downstream water rights, etc.”.<ref name="EM 1110-2-1602">[[ Hydraulic Design of Reservoir Outlet Works (EM 1110-2-1602) \| Hydraulic Design of Reservoir Outlet Works (EM 1110-2-1602), USACE, 1980]]</ref>

	~~“Reservoirs~~ may improve water quality by merely permitting the management of flow. This management may include maintenance of minimum flows, blending selective releases from one or more reservoirs to maintain a given stream quality, and the exclusion of a flow from a system by diversion.<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>		“[[Reservoirs]] may improve water quality by merely [[permitting]] the management of flow. This management may include maintenance of minimum flows, blending selective releases from one or more reservoirs to maintain a given stream quality, and the exclusion of a flow from a system by diversion.<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>

	“Minimum flow is often maintained in a stream for navigation, recreation, fish and wildlife, and water rights purposes. Such flows may also aid in maintaining acceptable water quality.<ref name="EM 1110-2-1420" />		“Minimum flow is often maintained in a stream for [[navigation]], [[recreation]], fish and wildlife, and water rights purposes. Such flows may also aid in maintaining acceptable water quality.<ref name="EM 1110-2-1420" />

	“There is general agreement that water may be stored and selectively released to help reduce natural water quality problems where source control is not possible, and also that water should not be stored and released solely to improve water quality where similar improvement may be achieved by treatment at the source. The use of a water resource to dilute treatable waste materials is regarded as the misuse of a valuable resource in most cases”.<ref name="EM 1110-2-1420" />		“There is general agreement that water may be stored and selectively released to help reduce natural water quality problems where source control is not possible, and also that water should not be stored and released solely to improve water quality where similar improvement may be achieved by treatment at the source. The use of a water resource to dilute treatable waste materials is regarded as the misuse of a valuable resource in most cases”.<ref name="EM 1110-2-1420" />
Line 14:		Line 14:
	'''Water Availability'''		'''Water Availability'''

	“The determination of storage-yield relationships for a reservoir project is one of the basic hydrologic analyses for reservoirs. The basic objective can be to determine the reservoir yield given a storage allocation, or fine the storage required to obtain a desired yield. The determination follows a traditional engineering approach:<ref name="EM 1110-2-1420" />		“The determination of storage-yield relationships for a reservoir project is one of the basic hydrologic analyses for reservoirs. The basic objective can be to determine the reservoir yield given a storage allocation, or fine the storage required to obtain a desired yield. The determination follows a traditional [[engineering]] approach:<ref name="EM 1110-2-1420" />
	#"Determine the study objectives. This includes the project purposes, operation goals, and the evaluation criteria.<ref name="EM 1110-2-1420" />		#"Determine the study objectives. This includes the project purposes, [[operation]] goals, and the evaluation criteria.<ref name="EM 1110-2-1420" />
	#"Determine the physical and hydrologic constraints for the site. This includes the reservoir storage and outflow capability, as well as the downstream channel system.<ref name="EM 1110-2-1420" />		#"Determine the physical and hydrologic constraints for the site. This includes the reservoir storage and outflow capability, as well as the downstream channel system.<ref name="EM 1110-2-1420" />
	#"Compile the basic data. The basic data include demands, flow, and losses. Also, the appropriate time interval for analysis, which depends on the data and its variations in time.<ref name="EM 1110-2-1420" />		#"Compile the basic data. The basic data include demands, flow, and losses. Also, the appropriate time interval for analysis, which depends on the data and its variations in time.<ref name="EM 1110-2-1420" />
Line 22:		Line 22:

	==Best Practices Resources==		==Best Practices Resources==
	{{Document Icon}} [[~~Hydrology~~ National Engineering Handbook: Chapter 5- Streamflow Data\|National Engineering Handbook: Chapter 5- Streamflow Data (Natural Resources Conservation Service)]]		{{Document Icon}} [[National Engineering Handbook: Chapter 5 - Streamflow Data \| National Engineering Handbook: Chapter 5 - Streamflow Data (Natural Resources Conservation Service)]]

	<!-- For information on notation for in text citations visit https://www.mediawiki.org/wiki/Help:Cite Or simply enclose the citation as shown <ref> citation </ref> in the location of the in text mention. Citations will automatically populate below-->		<!-- For information on notation for in text citations visit https://www.mediawiki.org/wiki/Help:Cite Or simply enclose the citation as shown <ref> citation </ref> in the location of the in text mention. Citations will automatically populate below-->