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Standard Step Method
The standard step method (STM) is a computational technique utilized to estimate one-dimensional surface water profiles in open channels with gradually varied flow under steady state conditions. It uses a combination of the energy, momentum, and continuity equations to determine water depth with a given a friction slope (S_f), channel slope (S_0), channel geometry, and also a given flow rate. In practice, this technique is widely used through the computer program HEC-RAS, developed by the US Army Corps of Engineers Hydrologic Engineering Center (HEC). Open channel flow fundamentals The energy equation used for open channel flow computations is a simplification of the Bernoulli Equation (See Bernoulli Principle), which takes into account pressure head, elevation head, and velocity head. (Note, energy and head are synonymous in Fluid Dynamics. See Pressure head for more details.) In open channels, it is assumed that changes in atmospheric pressure are negligible, therefore th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
HEC-RAS
HEC-RAS is simulation software used in computational fluid dynamics – specifically, to model the hydraulics of water flow through natural rivers and other channels. The program was developed by the United States Army Corps of Engineers in order to manage the rivers, harbors, and other public works under their jurisdiction; it has found wide acceptance by many others since its public release in 1995. The Hydrologic Engineering Center (HEC) in Davis, California, developed the River Analysis System (RAS) to aid hydraulic engineers in channel flow analysis and floodplain determination. It includes numerous data entry capabilities, hydraulic analysis components, data storage and management capabilities, and graphing and reporting capabilities. Functionality The basic computational procedure of HEC-RAS for steady flow is based on the solution of the one-dimensional energy equation. Energy losses are evaluated by friction and contraction / expansion. The momentum equation may ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Large Standard Step Method Problem Statement
Large means of great size. Large may also refer to: Mathematics * Arbitrarily large, a phrase in mathematics * Large cardinal, a property of certain transfinite numbers * Large category, a category with a proper class of objects and morphisms (or both) * Large diffeomorphism, a diffeomorphism that cannot be continuously connected to the identity diffeomorphism in mathematics and physics * Large numbers, numbers significantly larger than those ordinarily used in everyday life * Large ordinal, a type of number in set theory * Large sieve, a method of analytic number theory ** Larger sieve, a heightening of the large sieve * Law of large numbers, a result in probability theory * Sufficiently large, a phrase in mathematics Other uses * ''Large'' (film), a 2001 comedy film * Large (surname), an English surname * LARGE, an enzyme * Large, a British English name for the maxima (music), a note length in mensural notation * Large, or G's, or grand, slang for $1,000 US dollars * Large, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
HEC-RAS Model Downstream Of Gate With Jump
HEC-RAS is simulation software used in computational fluid dynamics – specifically, to model the hydraulics of water flow through natural rivers and other channels. The program was developed by the United States Army Corps of Engineers in order to manage the rivers, harbors, and other public works under their jurisdiction; it has found wide acceptance by many others since its public release in 1995. The Hydrologic Engineering Center (HEC) in Davis, California, developed the River Analysis System (RAS) to aid hydraulic engineers in channel flow analysis and floodplain determination. It includes numerous data entry capabilities, hydraulic analysis components, data storage and management capabilities, and graphing and reporting capabilities. Functionality The basic computational procedure of HEC-RAS for steady flow is based on the solution of the one-dimensional energy equation. Energy losses are evaluated by friction and contraction / expansion. The momentum equation may b ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Downstream Water Surface Profile
Downstream may refer to: * Downstream (hydrology), the direction towards the mouth of a stream, i.e. the direction the current flows * Downstream (bioprocess), when a cell mass from an upstream process (isolated, grown and harvested) is further processed to meet purity and quality requirements * Downstream (manufacturing), processes which occur later on in a production sequence or production line * Downstream (networking), data sent from a network service provider to a customer * Downstream (software development), direction away from the original authors or maintainers of software * Downstream (petroleum industry), oil and gas industry sector concerned with refining, processing and purifying, as well as consumer marketing and distribution of products * Downstream (DNA), the direction of an RNA molecule based on its 3' relative position of genetic code * Downstream (transduction), direction of cell signals opposite to that which are triggered by the binding of signal molecules (recept ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Upstream Water Surface Profile
Upstream may refer to: * Upstream (hydrology), the direction towards the source of a stream (against the direction of flow) * Upstream (bioprocess), part of therapeutic cell manufacturing processes from early cell isolation and cultivation until final harvest * ''Upstream'' (film), a 1927 film by John Ford * Upstream (networking), direction in which data can be transferred from the client to the server (uploading) * ''Upstream'' (newspaper), a newspaper covering the oil and gas industry * Upstream (petroleum industry), sector of the oil and gas industry concerned with searching, exploratory drilling, and well operation * Upstream (software development), direction towards the original authors or maintainers of software * Upstream (streaming service), a Philippine digital over-the-top streaming service * Upstream (DNA), the direction of an RNA molecule based on its 5' relative position of genetic code * Upstream (transduction), direction of cell signals which are triggered by th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Large Standard Step Spreadsheet
Large means of great size. Large may also refer to: Mathematics * Arbitrarily large, a phrase in mathematics * Large cardinal, a property of certain transfinite numbers * Large category, a category with a proper class of objects and morphisms (or both) * Large diffeomorphism, a diffeomorphism that cannot be continuously connected to the identity diffeomorphism in mathematics and physics * Large numbers, numbers significantly larger than those ordinarily used in everyday life * Large ordinal, a type of number in set theory * Large sieve, a method of analytic number theory ** Larger sieve, a heightening of the large sieve * Law of large numbers, a result in probability theory * Sufficiently large, a phrase in mathematics Other uses * ''Large'' (film), a 2001 comedy film * Large (surname), an English surname * LARGE, an enzyme * Large, a British English name for the maxima (music), a note length in mensural notation * Large, or G's, or grand, slang for $1,000 US dollars * Large, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Conjugate Depth
Hydraulic jump in a rectangular channel, also known as classical jump, is a natural phenomenon that occurs whenever flow changes from supercritical to subcritical flow. In this transition, the water surface rises abruptly, surface rollers are formed, intense mixing occurs, air is entrained, and often a large amount of energy is dissipated. Numeric models created using the standard step method or HEC-RAS are used to track supercritical and subcritical flows to determine where in a specific reach a hydraulic jump will form. There are common hydraulic jumps that occur in everyday situations such as during the use of a household sink. There are also man-made hydraulic jumps created by devices like weirs or sluice gates. In general, a hydraulic jump may be used to dissipate energy, to mix chemicals, or to act as an aeration device. To produce equations describing the jump, since there is an unknown energy loss, there is a need to apply momentum–depth relationship in a rectangular chann ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Large Standard Step Method Step 3
Large means of great size. Large may also refer to: Mathematics * Arbitrarily large, a phrase in mathematics * Large cardinal, a property of certain transfinite numbers * Large category, a category with a proper class of objects and morphisms (or both) * Large diffeomorphism, a diffeomorphism that cannot be continuously connected to the identity diffeomorphism in mathematics and physics * Large numbers, numbers significantly larger than those ordinarily used in everyday life * Large ordinal, a type of number in set theory * Large sieve, a method of analytic number theory ** Larger sieve, a heightening of the large sieve * Law of large numbers, a result in probability theory * Sufficiently large, a phrase in mathematics Other uses * ''Large'' (film), a 2001 comedy film * Large (surname), an English surname * LARGE, an enzyme * Large, a British English name for the maxima (music), a note length in mensural notation * Large, or G's, or grand, slang for $1,000 US dollars * Large, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
