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Simulation of groundwater dynamic response to hydrological factors in karst aquifer system
详细信息       来源:Journal of Hydrology    发布日期:2021年2月18日
  • 标题:Simulation of groundwater dynamic response to hydrological factors in karst aquifer system
  • 关键词:Karst aquifer,Similarity simulation,Influencing factors,Seepage process,Recession process
  • 作者:Hanghang Ding, Xuemei Zhang, Xuewei Chu, Qiang Wu

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内容简介

A similar physical simulation experiment is a kind of generalization and reduction of real objects by similarity principle, which achieves the simulation of the actual situation. In order to reveal the inflfluencing factors and mechanisms of the groundwater flflow process in the karst aquifer system. In this paper, the hydrological cycle process of the karst aquifer system is comprehensively considered, and a conceptual model is established including hydrological factors such as rainfall recharge, epikarst zone, doline, fifissure, conduit, and spring. Also, a three-dimensional physical model of karst fifissure-conduit for experiments is designed and fabricated from the similarity with the groundwater channel structure based on the hydrological conceptual model. Moreover, karst aquifer under difffferent rainfall conditions and aquifer structures is designed to simulate the process of seepage and recession. The experiments were divided into 24 groups, three times for each group. The experiment results show that: (1) the rainfall intensity has a signifificant impact on the maximum peak flflow, conflfluence time and flflow duration of the spring flflow process; (2) the epikarst zone has a vital inflfluence on the conflfluence time, flflow duration and curve shape of the spring flflow process, and has little effffect on the peak flflow; and (3) the aquifer structure is the main factor affffecting the initial flflow, the slope of the recession curve and the recession coeffiffifficient of the spring recession process. Finally, this study indicates that the concept model is reasonable. The physical model for simulating the hydrological process can be applied to a wide range in karst aquifers, taking into account more geological factors.

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