A Modeling Experiment of Seepage in a Pipe for the Formation of a Hot Spring

Abstract

Abstract:

The circulation mechanism in the formation of hot springs is very complicated in nature, and previous studies have reported little about the experimental models of hot springs. By designing a simple experimental apparatus based on the characteristic of fault deep circulation type of hot springs, the modeling experiment is conducted. A semicircular steel tube filled with sand is used to carry out the modeling experiment of hot water circulation under different temperature conditions to examine the influencing factors of the discharge in that procedure. The calculated coefficient of permeability of the experimental sand ranges from 50.59 to 57.94 m/d under the condition of room temperature. The results also show that the discharge of the hot spring increases with temperature, except for its positive correlation with water head difference, coefficient of permeability of the media and the cross sectional area. The procedure of hot spring formation is the groundwater circulation with energy conversion, and the accepted heat from deep heating source in groundwater leads to increasing of temperature and the change in temperature causes the decline in kinetic viscosity. As a result, the discharge rate increases. The discharge and temperature data from hot springs in northern Hebei and southeastern Guangxi are employed to validate the experiment results and the reasonable results are further analyzed.

Key words: hot spring, modeling experiment, temperature, discharge, thermal groundwater

GUO Shuai, ZHOU Xun, TUN Yang, FANG Bin, DIAO Jing-Bei, LIU Dong-Lin. A Modeling Experiment of Seepage in a Pipe for the Formation of a Hot Spring[J]. Geoscience, 2012, 26(3): 620-626.

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