Contribution degree-based underground water level analysis method with copula function

Abstract

The invention relates to a contribution degree-based underground water level analysis method with a copula function and belongs to the technical field of joint probability analysis. The method comprises the steps of determining usage amounts of underground water in different industries to obtain an underground water consumption index which represents underground water consumption; analyzing the contribution degree of rainfall and consumption indexes for an underground water level; and constructing a three-dimensional copula function in consideration of the contribution degree, analyzing a dynamic relation between an underground water level change and a consumption supply from the aspect of probability, and providing a basis for decision makers in combination with rainfall prediction or regional socio-economic development planning. By use of the method, the probability of the underground water level which may reach a certain value when the economic development reaches different levels can be researched according to prediction for future rainfall, and the probability provides a reference for regional economic development; or the possibility of different underground water levels under different rainfall conditions is researched according to the economic development prediction and provides a basis for underground water protection.

Description

technical field [0001] The invention relates to a groundwater level analysis method based on a contribution degree of a Copula function, and belongs to the technical field of joint probability analysis. Background technique [0002] As an important strategic resource for sustainable economic and social development, water plays an irreplaceable role. As an important part of it, groundwater resources not only make up for the lack of regional water supply caused by the uneven distribution of surface water resources in time and space, but also support the harmony of the ecological environment. Groundwater has provided water source assurance and made great contributions to the development of the national economy and the improvement of people's living standards. However, in recent years, due to disorderly exploitation, groundwater has been seriously overexploited, especially in Hebei, Shanxi and other places, causing the groundwater level to continue to decline. and a series of w...

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Problems solved by technology

[0004] The main source of groundwater recharge is rainfall, and the main consumption is human exploitation. The current groundwater level analysis and research have limitations

First of all, the current research does not consider the contribution of the two to the change of groundwater level, and only takes the two as influencing factors into the model for prediction and analysis, lacking consideration of the weight; secondly, it does not explore The relationship between groundwater level changes, recharge and consumption, and the possible risks from the perspective of probability are given to provide a basis for decision makers

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