基于表层岩土渗透对三峡井网井水位降雨影响的精准分析

Accurate Analysis of the Effect of Rainfall on Water Level of the Three Gorges Well Network Based on Surface Soil Infiltration

为研究三峡井网表层岩土渗透对井水位降雨的影响,采取井区表层岩土垂向渗透性测试方法试验,测得表层岩土垂向渗透性,并建立数学模型,用于降雨渗入补给分析。在此模型基础上,通过三峡井网8口井水位、气象三要素的对比观测资料对井水位日动态、月动态、年动态的影响进行精准分析与验证。结果表明:这种影响的特征是相当复杂的,同一个降雨过程在不同井上产生的影响特征不同,这一方面可能与各井的水文地质条件不同有关,另一方面可能还与各井点的降雨过程的差异也有关。

To study the influence of rainfall on the well water level of the Three Gorges well network,based on the surface rock and soil permeability,the vertical permeability test method of the surface rock and soil in the area where the wells existed was used to measure the vertical permeability of the surface rock and soil.A mathematical model was developed for the rainfall infiltration supply analysis.On the basis of this model,the effect of rainfall on the daily,monthly,and annual dynamics of well water level was accurately analyzed and checked through the comparative observation data of the water level and meteorology of eight wells in the three Gorges well network.The results show that the influence characteristics are quite complex.The influence characteristics of the same rainfall cycle on different wells are different.On one hand,they may be related to the different hydrogeological conditions of each well,while on the other hand,they may also be related to the difference in the cycle of rainfall at each well point.