Island outer ring aquitard design method for increasing island underground fresh water reserves

A design method and technology of weakly permeable layer, applied in water conservancy projects, marine engineering, buildings, etc., can solve the problems of thin freshwater lens body, low freshwater lens body reserve, restricting the development and utilization value of island freshwater lens body, etc., to alleviate the problem. Seawater intrusion, high promotion and application value, simple design effect

Inactive Publication Date: 2020-07-28
HOHAI UNIV
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Problems solved by technology

However, the thickness of freshwater lenses in natural islands or artificially filled homogeneous islands is usually thin, resulting in less available freshwater lens reserves, which directly restricts the development and utilization value of island freshwater lenses

Method used

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  • Island outer ring aquitard design method for increasing island underground fresh water reserves
  • Island outer ring aquitard design method for increasing island underground fresh water reserves
  • Island outer ring aquitard design method for increasing island underground fresh water reserves

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Embodiment Construction

[0044] The technical solutions of the present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0045] Such as figure 1 As shown, according to the hydrogeological data measured in the island area, the sea water level 1, rainfall 2, and the permeability coefficient and porosity of the island sediment 3 are obtained, and the permeability coefficient, width and porosity of the aquitard 4 in the outer ring of the island are to be determined Design Parameters.

[0046] 5 is the brackish-fresh water interface in the homogeneous island condition; 6 is the brackish-fresh water interface in the island outer ring aquitard condition.

[0047] The island is generalized into a two-dimensional cross-section seawater intrusion analysis model, and the outer aquitard of the island is introduced to obtain the seawater intrusion control equations in the island sediment and in the aquitard of the outer ring of the island:

[0048] (a) r=0...

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Abstract

The invention discloses an island outer ring aquitard design method for increasing island underground fresh water reserves. The island outer ring aquitard design method comprises the following steps that 1, hydrogeological data of an artificial island or a natural island are measured; 2, a two-dimensional island seawater intrusion model introduced into the island outer ring aquitard is established; 3, the depth of fresh water in the island is analyzed and calculated after the outer ring aquitard is added to the island; and 4, island fresh water reserves is calculated based on a two-dimensionalprofile model, and optimal aquitard design parameters are obtained according to the maximum island fresh water reserves. The method for increasing the fresh water reserve of the island can be appliedto artificial islands and natural islands, is convenient to construct and obvious in effect, can promote development and utilization of the island, can cope with shortage of water resources in islandareas, and has high popularization and application value.

Description

technical field [0001] The invention relates to the field of sustainable utilization of sea island fresh water resources, in particular to a design method for an aquitard outer ring of a sea island to increase the underground fresh water storage of the sea island. Background technique [0002] There are many natural islands and artificial islands in our country. The fresh water resources on the islands are of great significance for maintaining the ecosystem and meeting the daily needs of residents. However, with economic and social development, population growth, and against the background of climate warming and rising sea levels, islands are facing a more severe crisis of fresh water resources. The traditional freshwater resource protection measures for islands mainly include freshwater transportation by ship, rainwater collection on islands, and desalination of seawater. However, these measures have quite serious drawbacks. For example, the transportation of fresh water ...

Claims

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Application Information

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IPC IPC(8): E02B3/00
CPCE02B3/00
Inventor 鲁春辉马婧吴会强叶逾
Owner HOHAI UNIV
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