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River hydrographic survey method and device

A hydrological measurement and river technology, applied in the direction of measuring devices, fluid velocity measurement, liquid/fluid solid measurement, etc., can solve the problems of flow influence, river bottom shape change, inaccurate measurement results, etc., and achieve the effect of ensuring accuracy

Active Publication Date: 2021-08-06
CHINA INST OF WATER RESOURCES & HYDROPOWER RES
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Problems solved by technology

Furthermore, since the river water is mixed with silt, the silt will accumulate and sink to the bottom of the river continuously during the flow of the river, which will cause the shape of the river bottom to change and further affect the flow rate.
Because the above factors are not considered in the existing measurement methods, the measurement results are inaccurate

Method used

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  • River hydrographic survey method and device
  • River hydrographic survey method and device

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Embodiment 1

[0064] Please refer to Figure 1 to Figure 4 , This embodiment proposes a river hydrological measurement method, wherein, the method is used to measure rivers with a river surface width of 3-50 meters.

[0065] Specifically, this embodiment includes the following steps:

[0066] Please refer to figure 1 , S1, select the measurement location on the river to be measured. When choosing a measurement point, it is better to choose a place with flat river bank and relatively slow water flow. At the same time, when measuring, try to choose weather with lower wind speed as much as possible.

[0067] S2. Obtain the shape of the cross-section at the measurement location; specifically, the shape of the cross-section referred to here refers to the shape of the cross-section of the river water at the measurement location. That is, the cross-sectional shape of the water flow from the water level to the bottom of the river. The water surface caused by the unequal current velocity is not...

Embodiment 2

[0118] This embodiment proposes a river hydrological measurement device, including a cableway installed horizontally on the river, a water flow velocity measuring instrument, a sediment concentration detector and a water level gauge hoisted on the cableway; wherein, the water flow velocity measuring instrument, the sediment concentration detection instrument Instrument and water level gauge are all prior art, no longer explain separately here.

[0119] It also includes a fixed pile fixedly arranged on the river bank, and a horizontal laser instrument is arranged on the fixed pile, and the horizontal laser instrument is used to form a reference surface. The function of the fixed pile is to facilitate the placement of the horizontal laser, and to ensure that the horizontal laser planes produced by the horizontal laser are equal during different measurements, so as to eliminate errors caused by different reference surfaces.

[0120] Both the water velocity meter and the sand conc...

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Abstract

The invention discloses a river hydrographic measurement method and device, and the method comprises the following steps: S1, selecting a measurement part on a to-be-measured river; s2, obtaining the shape of the cross section of the measured part; s3, selecting a plurality of measurement points at the measurement part, and recording the positions of the measurement points on the cross section; s4, measuring different measuring points respectively; s5, fitting the measurement result to obtain a hydrological fitting function of the measurement value in the cross section range; and S6, performing integration on the hydrological fitting function in the region of the cross section to obtain corresponding hydrological data. The problems in the prior art can be solved, and the measurement precision of the river flow and the sand content is improved.

Description

technical field [0001] The invention relates to the technical field of river hydrological measurement, in particular to a river hydrological measurement method and device. Background technique [0002] The flow rate of water and the amount of sediment are important data in river hydrology. In the prior art, the flow velocity of the river is mainly characterized by single-point measurement or multi-point average calculation, and then the product of the cross-sectional area and the flow velocity is used as the flow rate. [0003] It has been found through research that in practice, due to the resistance of the river bottom soil, the water flow velocity at different locations on the same cross section is different. Usually, the flow velocity at the center of the river surface is greater than that near the bank; and The flow velocity at the river surface is greater than that at the bottom; on the other hand, due to the difference in the flow velocity of the river, the pressure ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01P5/00G01F23/292G01N33/18G01C13/00
CPCG01P5/00G01F23/292G01N33/18G01C13/006G01C13/008Y02A90/30
Inventor 张敏葛金金彭文启余杨计炳生渠晓东黄伟张汶海张海萍解莹
Owner CHINA INST OF WATER RESOURCES & HYDROPOWER RES
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