CN-121252920-B - Groundwater level determination method based on gravity gradient change

CN121252920BCN 121252920 BCN121252920 BCN 121252920BCN-121252920-B

Abstract

The embodiment of the disclosure provides a groundwater level determination method based on gravity gradient change, which can be applied to the technical field of water level monitoring. The method comprises the steps of determining a region to be measured below the ground surface according to the position of a point to be measured below the ground surface and the position of a point to be measured, determining a plurality of test points on the ground surface according to the region to be measured, determining at least one actual measuring point underground water level change of at least one actual gravity gradient change measuring point of the plurality of test points according to a plurality of actual gravity gradients of the plurality of test points and a plurality of actual measuring point underground water levels of the measuring point, and determining the underground water level change of the point to be measured according to the plurality of actual gravity gradient change amounts and the at least one actual measuring point underground water level change.

Inventors

HE JIANGUO
YANG HONG
WU BOYANG
YU JIAQI
LI NAN
LI BING
PAN JIE
ZHANG JIANQUAN
GUO YIQUN
ZHU JINBIAO

Assignees

中国科学院空天信息创新研究院
中国科学院空间应用工程与技术中心

Dates

Publication Date: 20260512
Application Date: 20251010

Claims (8)

1. A method for determining groundwater level based on gravity gradient change, the method comprising: Determining a region to be measured below the ground surface according to the position of the point to be measured at the point to be measured below the ground surface and the position of the point to be measured associated with the point to be measured; determining a plurality of test points positioned on the ground surface according to the region to be tested, wherein the region to be tested comprises a structure to be tested corresponding to each of the plurality of test points; Determining at least one actual gravity gradient variation of each of the plurality of test points and at least one actual survey point groundwater level variation of the survey point according to a plurality of actual gravity gradients of each of the plurality of test points and a plurality of actual survey point groundwater levels of the survey point; determining the underground water level change of the point to be detected according to the actual gravity gradient change and the underground water level change of the at least one actual survey point, wherein the determining comprises the following steps: Determining at least one water content variation of each of the plurality of structures to be detected according to the plurality of actual gravity gradient variation and the at least one actual survey point groundwater level variation; according to at least one water content variation of each of the plurality of structures to be measured, determining the groundwater level variation of the point to be measured, including: determining at least one water content of each of the plurality of structures to be tested according to the change amount of the at least one water content of each of the plurality of structures to be tested; Determining a structure to be measured with the minimum distance from the ground surface and the water content being greater than or equal to a first preset water content and less than or equal to a second preset water content from the structures to be measured according to the positions of the structures to be measured and at least one water content of the structures to be measured; And determining the underground water level change quantity of the to-be-measured point according to the position of the to-be-measured structure of each at least one target to-be-measured structure.
2. The method of claim 1, wherein said determining at least one change in water content for each of a plurality of said structures under test based on a plurality of said actual gravity gradient changes and said at least one actual survey point ground level change comprises: determining a plurality of candidate water content change amounts of each of the plurality of structures to be detected according to a plurality of actual gravity gradient change amounts based on a mapping function, wherein the mapping function represents a function between the actual gravity gradient change amounts and the water content change amounts; And determining at least one water content change amount of each of the plurality of structures to be detected from a plurality of candidate water content change amounts of each of the plurality of structures to be detected according to the at least one actual survey point underground water level change amount.
3. The method of claim 2, wherein said determining at least one water cut change for each of a plurality of said structures to be tested from a plurality of candidate water cut changes for each of a plurality of said structures to be tested based on said at least one actual survey point subsurface water level change comprises: Determining a plurality of estimated survey point underground water level change amounts of the survey points according to a plurality of candidate water content change amounts of each of the structures to be detected; and determining at least one water content change amount of each of the plurality of structures to be detected from a plurality of candidate water content change amounts of each of the plurality of structures to be detected according to the at least one actual survey point underground water level change amount and the plurality of estimated survey point underground water level change amounts.
4. The method of claim 1, wherein the position of the structure to be measured is determined based on an absolute position of a gravity gradiometer for acquiring a gravity gradient of the test site and a relative position between the gravity gradiometer and the structure to be measured.
5. A method according to any one of claims 1 to 3, further comprising: Determining at least one estimated gravity gradient change amount of each of the plurality of test points according to the position of each of the plurality of structures to be tested and at least one water content change amount of each of the plurality of structures to be tested; And under the condition that the association relation between at least one estimated gravity gradient change quantity and at least one actual gravity gradient change quantity of each of the plurality of test points does not meet the preset condition, adjusting the underground water level change quantity of the point to be tested.
6. A method according to any one of claims 1 to 3, wherein the plurality of actual gravity gradients comprises a first actual gravity gradient corresponding to a first time and a second actual gravity gradient corresponding to a second time, and the plurality of actual survey point ground water levels comprises a first actual survey point ground water level corresponding to the first time and a second actual survey point ground water level corresponding to the second time; Wherein said determining at least one actual gravity gradient variation for each of said plurality of test points and at least one actual survey point groundwater level variation for said survey point based on a plurality of actual gravity gradients for each of said plurality of test points and a plurality of actual survey point groundwater levels for said survey point comprises: Determining the actual gravity gradient variation of each of the plurality of test points according to the first actual gravity gradient and the second actual gravity gradient of each of the plurality of test points; And determining the actual survey point ground water level change quantity of the survey point according to the first actual survey point ground water level and the second actual survey point ground water level of the survey point.
7. A method according to any one of claims 1 to 3, wherein determining the area to be measured below the surface from the position of the point to be measured at the point to be measured below the surface and the position of the point to be measured at the point to be measured associated with the point to be measured comprises: Determining a connecting line between a point to be measured and a survey point according to the position of the point to be measured, which is positioned below the ground, and the survey point position of the survey point associated with the point to be measured; and determining the region to be measured positioned below the ground surface according to the connecting line.
8. A method according to any one of claims 1 to 3, wherein the area under test comprises a plurality of unit areas under test; wherein, the determining a plurality of test points on the ground surface according to the region to be tested includes: and determining a plurality of test points positioned on the ground surface according to the plurality of unit areas to be tested.

Description

Groundwater level determination method based on gravity gradient change Technical Field The embodiment of the disclosure relates to the technical field of water level monitoring, in particular to a groundwater level determining method based on gravity gradient change. Background Groundwater is taken as a component of water resources, accounts for more than 30% of global fresh water resources, and is a key water source for resident domestic water, industrial production and agricultural irrigation. However, with the acceleration of industrialization and town process, the groundwater resource is more and more polluted and destroyed, the groundwater resource is more complex than the surface water resource, the water level change condition of the groundwater is difficult to directly observe, meanwhile, the problems of the groundwater pollution, the surface subsidence caused by the super mining of the groundwater and the like have hysteresis and accumulation, once the problems are accumulated to a certain extent, irreversible destruction is often caused, so the method has important significance in timely grasping the dynamic change condition of the groundwater level. Disclosure of Invention In view of the foregoing, embodiments of the present disclosure provide a groundwater level determination method, apparatus, electronic device, storage medium, and computer program product based on gravity gradient changes. According to a first aspect of the embodiment of the disclosure, a method for determining a groundwater level based on gravity gradient change is provided, which may include determining a region to be measured below a ground surface according to a position of a point to be measured below the ground surface and a position of a survey point associated with the point to be measured, determining a plurality of test points on the ground surface according to the region to be measured, determining at least one actual survey point groundwater level change amount of at least one actual gravity gradient change amount survey point of each of the plurality of test points according to a plurality of actual gravity gradients of each of the plurality of test points and a plurality of actual survey point groundwater levels of the survey point, and determining a to-be-measured point groundwater level change amount of the point to be measured according to the plurality of actual gravity gradient change amounts and the at least one actual survey point groundwater level change amount. According to the embodiment of the disclosure, the region to be measured comprises a structure to be measured corresponding to each of a plurality of test points, and the method comprises the steps of determining the change of the ground water level of the point to be measured according to the change of the gravity gradient and the change of the ground water level of at least one actual survey point. According to the embodiment of the disclosure, determining at least one water content change amount of each of a plurality of structures to be detected according to a plurality of actual gravity gradient change amounts and at least one actual survey point ground water level change amount comprises determining a plurality of candidate water content change amounts of each of the plurality of structures to be detected according to the plurality of actual gravity gradient change amounts based on a mapping function, wherein the mapping function represents a function between the actual gravity gradient change amounts and the water content change amounts, and determining at least one water content change amount of each of the plurality of structures to be detected from the plurality of candidate water content change amounts of each of the plurality of structures to be detected according to the at least one actual survey point ground water level change amount. According to the embodiment of the disclosure, the method for determining the at least one water content change amount of each of the plurality of structures to be detected from the plurality of candidate water content change amounts of each of the plurality of structures to be detected according to the at least one actual survey point underground water level change amount comprises the steps of determining a plurality of estimated survey point underground water level change amounts of a survey point according to the plurality of candidate water content change amounts of each of the plurality of structures to be detected, and determining the at least one water content change amount of each of the plurality of structures to be detected from the plurality of candidate water content change amounts of each of the plurality of structures to be detected according to the at least one actual survey point underground water level change amount and the plurality of estimated survey point underground water level change amounts. According to the embodiment of the disclosure, the method for determining the undergrou