Water balance calculation method for depression-spring water system in karst region

Abstract

The invention discloses a water balance calculation method for a depression-spring water system in a karst region. . The water balance calculation method of the spring water system comprises the following steps: dividing hydrological years according to rainfall, spring water flow and a complete peak valley corresponding to an underground water level; establishing a water balance relation of a hydrological year period; establishing a hydrological annual cycle groundwater balance relationship; establishing a critical water balance relationship; defining and solving a spring domain water storagecoefficient; establishing an underground water balance relationship in an effective supply time period; calculating the underground runoff hidden excretion amount; calculating the evaporation capacityand the like. The multi-year monthly precipitation, groundwater level and spring water flow data accumulated in the depression-spring system are fully leveraged to acquire all parameters through groundwater balance calculations, especially the monthly underground runoff hidden excretion amount and the monthly evaporation amount in a spring area through calculation, and effective data and supportare provided for underground water protection and development.

Description

technical field [0001] The invention belongs to the field of hydrogeology, and relates to a method for solving hidden discharge and evaporation of underground runoff through water balance calculation in a depression-spring water system in a karst area. Background technique [0002] Recently, affected by climate change and the overloaded development and use of groundwater, the depletion of karst groundwater has become more and more obvious along with the complex geological environment. Among them, the problem of attenuation or even interruption of spring water flow is particularly prominent. Such depletion of karst groundwater not only restricts urban development Development also affects people's normal life. Therefore, it has become an important means to solve the problem of karst groundwater depletion to carry out calculation and evaluation of groundwater balance in spring karst water system, and then to use water in a planned and scaled manner. [0003] At present, in the...

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Problems solved by technology

[0003] At present, in the depression-spring water system in karst areas, when there is no actual observation data of hidden discharge and evaporation of underground runoff, the empirical value method of infiltration coefficient is usually used for water balance calculation and evaluation. The selection of values ​​often has strong human subjectivity, and the rationality of the calculation results is even more difficult to grasp.

[0004] Therefore, there are deficiencies in the existing calculation methods for water balance of depression-spring water systems in karst areas

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