A monitoring and early warning method for seawater intrusion into groundwater

Abstract

The invention discloses a monitoring and early warning method for saline intruded into underground water. The method comprises the steps: performing fracture surface type station distribution on underground water of a surveyed area and obtaining underground water mineralization degrees and underground water levels of all monitoring points; determining intrusion boundary point coordinates and determining a saline intrusion range of the surveyed area according to the underground water mineralization degrees; calculating out saline intrusion dangerousness index grades, saline intrusion probabilities and saline intrusion early warning grades of all the monitoring points. The method can be used for detecting parameters of the underground water in the surveyed area; by means of classified calculation on the underground water conductivity, the relationship between the underground water conductivity and the underground water mineralization degrees can be accurately established; disaster earlywarning and forecasting can be performed based on a geostatistical analysis method; thus, saline intrusion current situation and probability distribution of the surveyed area can be accurately evaluated, disaster preventing and reducing capacity of coastal zones can be improved, and important significance in guiding large-scale coastal zone engineering development and management and guaranteeing resident living environment safety is achieved.

Description

technical field [0001] The invention belongs to the technical field of groundwater detection, and in particular relates to a monitoring and early warning method for detecting whether seawater intrusion disaster occurs in groundwater. Background technique [0002] Due to the influence of human activities such as groundwater extraction and sea level rise caused by climate change, seawater intrusion has become a common geological disaster in coastal areas around the world. The water-rock interaction in the process of seawater intrusion will cause a series of environmental problems such as groundwater salinization and soil degradation, which will seriously affect social and economic development and ecological environment security. Therefore, the problem of seawater intrusion has attracted the common attention of scientists all over the world. [0003] At present, the numerical simulation method is an effective means to quantitatively evaluate the problem of seawater intrusion, b...

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Problems solved by technology

[0003] At present, the numerical simulation method is an effective means to quantitatively evaluate the problem of seawater intrusion, but the use of models to predict seawater intrusion still faces two challenges: First, the traditional monitoring technology is limited by human resources and data continuity, and it is difficult to meet the numerical simulation data. Second, using analytical methods, finite element methods, finite difference methods and other methods to predict trends, limited by geological data, it is difficult to achieve regional-scale early warning

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