CN102023034A - Novel open channel water metering method based on multipoint water levels - Google Patents
Novel open channel water metering method based on multipoint water levels Download PDFInfo
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- CN102023034A CN102023034A CN201010296246XA CN201010296246A CN102023034A CN 102023034 A CN102023034 A CN 102023034A CN 201010296246X A CN201010296246X A CN 201010296246XA CN 201010296246 A CN201010296246 A CN 201010296246A CN 102023034 A CN102023034 A CN 102023034A
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Abstract
The invention relates to a novel open channel water metering method based on multipoint water levels. The water flow is worked out according to a modern computer computing technique by utilizing the traditional open channel hydraulic theory. In the method, three water gauges arranged in a control channel section at regular intervals are utilized to measure the overflowing water level value, the traditional open channel hydraulic theory is utilized to respectively calculate the overflowing amount of each section in a control channel section, and then the overflowing amount flowing through the control channel section is obtained through weighted average.
Description
Embodiment.
Technical field based on traditional hydraulics of open channels theoretical combine with the modern computer computing technique the new method of measurement open channel inflow-rate of water turbine
Background technology irrigated area water measure equipment and measuring technology are realize a plan water and the basic measures of controlling the quality of pouring water, are to carry out by square charge, the water-saving essential tool of promotion and means.The method that the irrigated area water gaging is commonly used comprises: the one, utilize the hydraulic structure water gaging, and characteristics are comparatively economical and easy; The 2nd, utilize ad hoc water measure equipment water gaging, characteristics are that achievement is more accurate, but cost of equipment is higher, and generally when not having hydraulic structure or existing hydraulic structure not to be used for water gaging, or the water gaging precision that requires adopts when surpassing the precision that hydraulic structure can reach; The 3rd, utilize the current meter water gaging, characteristics are that achievement is accurate, but the expense height, how testing and calculate is numerous and diversely used under the situation that no water conservancy project buildings and ad hoc water measure equipment can not utilize, and also must assist level measuring to open channel simultaneously; The 4th, utilize the buoy water gaging, characteristics are economic simple water-saving irrigation, but precision is low, also needs auxiliary level measuring simultaneously; The 5th, utilize the water gauge water gaging, common practices is in section is stablized all straight, as not have backwater effect canal section water-level measuring post to be set, and utilizes stage discharge relation to survey water, or installs the flow chi of making through converting, the direct survey read flow, but precision is poor slightly.From the basic skills of above irrigated area water gaging as can be seen, water measure equipment and the technology that adopts at present exists various shortcomings such as, installation and maintenance difficulty low such as cost height, precision, can not satisfy the whole requirement of modern irrigated areas administration.Though wherein the level measuring precision is poor slightly, because the testing simple, intuitive, is easy to be accepted and be convenient to automatic observation, thereby all occupies crucial status at the irrigated area water consumption measurement and even in the whole irrigation district informatization by numerous water users.
Summary of the invention the present invention adopts the modern computer computing technique, by measure the water level value of a plurality of positions with certain intervals in channel, utilizes traditional hydraulics of open channels theory, calculates the water amount of corresponding canal section.Concrete way is that section is stable in open channel, does not have in the control channel section of backwater effect, at interval 3 place's gauges is set according to certain distance, observes the water level value of these scale place, 3 place current respectively at synchronization.The waterlevel data that obtains according to measurement, calculate the water level gradient, in conjunction with the area of section of channel, the gradient at the bottom of the canal and the hydraulics key elements such as side slope roughness of controlling the channel section, utilize traditional hydraulics of open channels formula, adopt the modern computer computing technique, the inflow-rate of water turbine in the calculation control channel section corresponding moment of each section.By weighted average method, obtain the inflow-rate of water turbine in this moment canal section at last.Adopt this method water gaging, only need the periodic cleaning channel, constant with the roughness that guarantees control section, and the computational accuracy problem that influences that flow section does not have alluvial to cause gets final product.Adopt this method, construction is simple, and easy maintenance is lower to related personnel's technical requirement.
Description of drawings: open channel inflow-rate of water turbine surveyors' staff is provided with synoptic diagram
Claims (2)
1. open channel water gaging new method based on the multiple spot level measuring.It is characterized in that: by in open channel, measuring the water level value in a plurality of places, utilize traditional hydraulics of open channels theory, adopt the modern computer computing technique, calculate the open channel water flow with certain intervals.
2. the open channel water gaging new method that integrates traditional hydraulics of open channels theory and modern computer computing technique according to claim 1, by 3 gauges that the position that has certain intervals in the open channel section of comparison rule is provided with, gather the waterlevel data on the each point scale simultaneously.According to these waterlevel datas, determine the water level gradient, in conjunction with area of section, the canal base slope of channel fall, hydraulics key element such as side slope roughness, utilize traditional hydraulics of open channels formula, adopt the modern computer computing technique, calculate the free flow channel inflow-rate of water turbine.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201010296246XA CN102023034A (en) | 2010-09-29 | 2010-09-29 | Novel open channel water metering method based on multipoint water levels |
| CN 201110285079 CN102445239B (en) | 2010-09-29 | 2011-09-23 | Novel water metering method for open channel based on multi-point water level |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201010296246XA CN102023034A (en) | 2010-09-29 | 2010-09-29 | Novel open channel water metering method based on multipoint water levels |
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| CN102023034A true CN102023034A (en) | 2011-04-20 |
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| CN201010296246XA Pending CN102023034A (en) | 2010-09-29 | 2010-09-29 | Novel open channel water metering method based on multipoint water levels |
| CN 201110285079 Active CN102445239B (en) | 2010-09-29 | 2011-09-23 | Novel water metering method for open channel based on multi-point water level |
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| CN 201110285079 Active CN102445239B (en) | 2010-09-29 | 2011-09-23 | Novel water metering method for open channel based on multi-point water level |
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Cited By (2)
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| CN104535123A (en) * | 2014-12-29 | 2015-04-22 | 太原理工大学 | Online automatic channel flow measuring method |
| CN110567531A (en) * | 2019-08-21 | 2019-12-13 | 武汉联宇技术股份有限公司 | Rectangular cross section open channel water flow measuring device that overflows |
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| JPH1062231A (en) * | 1996-08-22 | 1998-03-06 | Hitachi Ltd | Screen display apparatus for measurement of water level and water level-measuring apparatus |
| JP2001082997A (en) * | 1999-09-10 | 2001-03-30 | Hitachi Ltd | Water level measuring method and its device |
| CN100425956C (en) * | 2004-04-23 | 2008-10-15 | 汤哲夫 | Liquid level measuring method and device |
| CN101251402A (en) * | 2008-04-08 | 2008-08-27 | 中冶京诚工程技术有限公司 | System and method for processing gas-holder location data |
| CN101718573B (en) * | 2009-12-04 | 2011-06-29 | 河海大学常州校区 | System and method for measuring water level based on image vision |
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2010
- 2010-09-29 CN CN201010296246XA patent/CN102023034A/en active Pending
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104535123A (en) * | 2014-12-29 | 2015-04-22 | 太原理工大学 | Online automatic channel flow measuring method |
| CN110567531A (en) * | 2019-08-21 | 2019-12-13 | 武汉联宇技术股份有限公司 | Rectangular cross section open channel water flow measuring device that overflows |
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| Publication number | Publication date |
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| CN102445239B (en) | 2013-01-02 |
| CN102445239A (en) | 2012-05-09 |
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Open date: 20110420 |