Backwater definition

Backwater means the increase in water surface level immediately upstream from any structure, dam, obstruction or deposit, erected, used, or maintained in the floodway or on the flood plains caused by the resulting reduction in conveyance area.
Backwater means the increase in the water surface ele- vation that results from a bridge and any associated road fills under average water flow conditions.
Backwater means a temporary or permanent body of water that fills from the main river channel but excludes the coorong, lake Alexandrina and lake Albert.

Examples of Backwater in a sentence

  • Backwater on the outlet structure from the downstream drainage system shall be evaluated when designing the outlet.

  • Backwater valves shall be installed on each overflow and tank drain pipe to prevent unwanted water from draining back into the storage tank.

  • Rocky Bayou Area, Yazoo Backwater Area, Yazoo Basin, Mississippi, authorized by the Flood Control Act approved August 18, 1941.

  • Backwater valves shall be constructed and installed in accordance with Section P3008.

  • Backwater Valves: Install backwater valves in piping subject to backflow.

  • Backwater valves, when fully opened, shall have a capacity not less than that of the pipes in which they are installed.

  • Backwater valves shall be installed so that access is provided to the working parts for service and repair.

  • Backwater from a down slope conveyance system may impact a pond’s water quality and/or flood control performance.• Flap gates shall not impede flow in down slope pipes, channels or streams.• Ice accumulation within the down slope conveyance system shall be considered during flap gate and principal outlet design.

  • Backwater protection device(s) must be provided where there is the potential for backwater from OSD system into areas that are below the OSD system overflow level.

  • Second, the Backwater Analysis method is used to analyze both proposed and existing pipe systems to verify adequate capacity.


More Definitions of Backwater

Backwater means the increase in water elevation caused by an obstruction within a stream.

Related to Backwater

  • Storm water management plan means a comprehensive plan designed to reduce the discharge of pollutants from storm water after the site has under gone final stabilization following completion of the construction activity.

  • Fresh water means water, such as tap water, that has not been previously used in a process operation or, if the water has been recycled from a process operation, it has been treated and meets the effluent guidelines for chromium wastewater.

  • Virginia Stormwater Management Program or “VSMP” means a program approved by the State Board after September 13, 2011, that has been established by a locality to manage the quality and quantity of runoff resulting from land-disturbing activities and shall include such items as local ordinances, rules, permit requirements, annual standards and specifications, policies and guidelines, technical materials, and requirements for plan review, inspection, enforcement, where authorized in this article, and evaluation consistent with the requirements of this article and associated regulations.

  • Infrastructure means infrastructure serving the County and improved or unimproved real estate and personal property, including machinery and equipment, used in the operation of the Project, within the meaning of Section 4-29-68 of the Code.

  • Infrastructure project means any construction or acquisition of treatment works,

  • Runoff coefficient means the fraction of total rainfall that will appear at the conveyance as runoff.

  • infrastructure manager means any body or undertaking that is responsible in particular for establishing and maintaining railway infrastructure, or a part thereof, as defined in Article 3 of Directive 91/440/EEC, which may also include the management of infrastructure control and safety systems. The functions of the infrastructure manager on a network or part of a network may be allocated to different bodies or undertakings;

  • Stormwater management plan means the set of drawings and other documents that comprise all the information and specifications for the programs, drainage systems, structures, BMPs, concepts and techniques intended to maintain or restore quality and quantity of stormwater runoff to pre-development levels.

  • Infrastructure fund means the renewable fuel infrastructure fund created in section 159A.16.

  • Virginia Stormwater Management Program authority or "VSMP authority" means an authority approved by the State Board after September 13, 2011, to operate a Virginia Stormwater Management Program.

  • Copper Loop A stand-alone Local Loop comprised entirely of copper wire or copper cable. Copper Loops include two-wire and four-wire analog voice-grade Copper Loops, digital Copper Loops (e.g., DS0s and Integrated Services Digital Network lines), as well as two-wire and four-wire Copper Loops conditioned to transmit the digital signals needed to provide digital subscriber line services, regardless of whether the Copper Loops are in service or held as spares. A Copper Loop includes attached electronics using Time Division Multiplexing (TDM) technology, but does not include packet, cell or frame switching capabilities.

  • ATC means a measure of the transfer capability remaining in the physical transmission network for further commercial activity over and above already committed uses.

  • energy infrastructure means any physical equipment or facility which is located within the Union or linking the Union to one or more third countries and falling under the following categories:

  • Renewable energy project means (A) a project

  • Rechargeable Electrical Energy Storage System (REESS) means the rechargeable energy storage system that provides electric energy for electrical propulsion.

  • NOC means National Olympic Committee.

  • Storm water means storm water runoff, snow melt runoff, and surface runoff and drainage.

  • public service infrastructure means publicly controlled infrastructure of the following kinds:

  • Broadband infrastructure means the physical infrastructure used for the transmission of data that provides broadband services. “Broadband infrastructure” does not include land, buildings, structures, improvements, or equipment not directly used in the transmission of data via broadband.

  • Modern Slavery has the same meaning as in the Modern Slavery Act 2018 (Cth).

  • Pipeline means any pipe, pipes, or pipelines used for the intrastate transportation or transmission of any solid, liquid, or gaseous substance, except water.

  • Stormwater management BMP means an excavation or embankment and related areas designed to retain stormwater runoff. A stormwater management BMP may either be normally dry (that is, a detention basin or infiltration system), retain water in a permanent pool (a retention basin), or be planted mainly with wetland vegetation (most constructed stormwater wetlands).

  • energy storage means, in the electricity system, deferring the final use of electricity to a moment later than when it was generated, or the conversion of electrical energy into a form of energy which can be stored, the storing of such energy, and the subsequent reconversion of such energy into electrical energy or use as another energy carrier;

  • Stormwater management means the programs to maintain quality and quantity of stormwater runoff to pre-development levels.