补给区温度季节性周期波动对承压含水层温度影响的解析研究  

Analytical study on temperature variations in a confined aquifer system owing to seasonal temperature fluctuations in the recharge area

作　　者：刘超[1] 李海龙[1,2] 夏玉强[1] 田野[1] 耿晓龙[2] 

机构地区：[1]中国地质大学环境学院及(教育部)生物地质与环境地质(重点)实验室,武汉430074 [2]鞍山师范学院数学系,辽宁鞍山114005

出　　处：《工程勘察》2010年第1期42-46,54,共6页Geotechnical Investigation & Surveying

基　　金：鞍山市旅游区水资源可持续利用研究资助(2007JZ04);高等学校学科创新引智计划资助(B08030)

摘　　要：本文介绍了补给区温度季节性周期波动对承压含水层温度的影响,建立了相应的数学模型,并导出了其解析解。通过对该解析解的分析表明:补给区温度的季节性波动会导致含水层中温度的周期性波动,其波动幅度随与补给区距离的增加而减小,并具有一定的时间滞后性,且含水层中温度的波动情况与含水层的热容量和地下水的流速有关。还发现当含水层自身的热容量发生改变时,含水层中温度波动始终围绕着同一个均值进行波动,只有振幅和相位上发生相应变化,而当含水层中地下水的流速发生改变时,含水层中温度波动的均值也发生相应改变。对于含水层中没有温度波动的区域,温度随距补给区水平距离的变化率与含水层的热容量和地下水流速无关。Analytical studies are carried out to investigate temperature variations in a confined aquifer system owing to seasonal temperature fluctuations in its recharge area. A mathematic model is established to describe the system, and the exact analytical solution to the model is derived. The results form the analytical solution indicated that seasonal temperature fluctuations in the recharge area would lead to the periodic temperature fluctuations with smaller amplitude and certain time lag in the aquifer, and the temperature variations in the confined aquifer are dependent on both the flow velocity of groundwater and the thermal capacity of the aquifer. It is also discovered the velocity influences the mean of the temperature fluctuations in the aquifer, but the thermal capacity does not. While in the aquifer part where there are no temperature fluctuations, the temperature variation rate with the distance from the recharge area is not related with them.

关 键 词：承压含水层 温度波动 解析解 

分 类 号：X826[环境科学与工程—环境工程]