An Inversion Method of Freshwater Guarantee Rate along the Estuary

A guaranteed rate, fresh water technology, applied in the direction of instrumentation, design optimization/simulation, calculation, etc., can solve the problems of inconvenient estuary salt water intrusion risk assessment, inability to reasonably determine water intake, difficulty in on-site salinity measurement, etc., to achieve good results Portability and applicability, convenient and reasonable site selection, and accurate quantitative effects

Active Publication Date: 2022-06-07
HOHAI UNIV
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Problems solved by technology

[0004] However, compared with the runoff and tidal level measurement series, it is very difficult to measure the salinity of the entire river estuary on-site. The long-term salinity measurement data of the estuary is often very lacking, which makes it difficult to assess the risk of saltwater intrusion in the estuary, let alone rationalize the water intake. Sure

Method used

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  • An Inversion Method of Freshwater Guarantee Rate along the Estuary
  • An Inversion Method of Freshwater Guarantee Rate along the Estuary
  • An Inversion Method of Freshwater Guarantee Rate along the Estuary

Examples

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Embodiment 1

[0112] This example takes the study of saltwater intrusion in an estuary as an example. Based on the Copula function and the three-dimensional mathematical model, the runoff-tidal level correlation characteristics and the sensitivity analysis of saltwater intrusion are respectively carried out. The uncertainty study of fresh water guarantee rate along the way. according to figure 1 The simplified flow chart of , the specific implementation steps are as follows:

[0113] (1) The frequency analysis of the historical daily runoff and tide level data of the estuary shows that the cumulative frequency curve of the estuary runoff approximately obeys the Gompertz distribution after taking the logarithm, and the daily high tide level distribution approximately obeys the normal value with a mean μ of 1.24 and a standard deviation of σ of 0.27 distributed,

[0114]

[0115] x=lg(q+M)

[0116] where q is the runoff (m 3 / s), F is the marginal distribution function of runoff, M is ...

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Abstract

The invention discloses an inversion method for freshwater guarantee rate along the estuary, which comprises the following steps: according to the historical freshwater runoff and tide level data of the estuary, the runoff distribution function affected by artificial water intake is obtained; B. Establishing the runoff-tide level two-dimensional joint distribution and its joint risk probability model; C. Based on the measured topography of the estuary, construct a three-dimensional hydrodynamic and salinity mathematical model; D. Based on the three-dimensional hydrodynamic and salinity mathematical model obtained in step C, use the item-by-item combination of runoff and tidal level Saltwater intrusion simulation, get the runoff and tidal intervals where no saltwater intrusion occurs in each river section, that is, the freshwater guarantee area; E. Calculate the freshwater guarantee rate along the estuary with saltwater intrusion based on step B and step D; F. According to step E, get The freshwater guarantee rate along the estuary is obtained, and then the critical water intake section under different water intake scales is obtained. The invention has the beneficial effects of providing a risk assessment method for salt water intrusion, capable of realizing accurate quantification of the fresh water guarantee rate along the estuary.

Description

technical field [0001] The invention relates to the field of estuarine freshwater resource utilization, in particular to an inversion method of freshwater guarantee rate along the estuary. Background technique [0002] With the development of social economy, water resources are becoming an increasingly important resource for all walks of life. The estuary area of ​​rivers is often affected by salt water intrusion. The salinity of water bodies affects the river and wetland ecosystems, and also affects the development and utilization of human water resources. Many large cities and population settlements are located in estuaries, and freshwater resources are very important. Due to the influence of saltwater intrusion, the selection of water intake scales and locations at the estuary of rivers have an important impact on drinking water safety and social and economic development. [0003] Estuarine salinity is under the combined action of hydrological and topographical factors s...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F30/20G06F30/28G06F113/08G06F119/14
CPCG06F2111/10G06F30/20Y02A10/40
Inventor 贺蔚张健俞晓东陈胜
Owner HOHAI UNIV
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