摘要
为了研究岩溶地区泉域系统演化过程及对泉流量进行预测,耦合了渗流模型和岩溶动力模型,对均质性和非均质性2种条件下泉域系统进行了溶蚀演化模拟。从模拟结果上可以看出,均质性泉域系统初期水位变化较小,中后期下降明显,而非均质性泉域系统初期下降明显,中后期水位稳定;在裂隙张开度方面,非均质模型在相同时段内裂隙张开度的最大值却比均质性模型要大4～5cm。2个泉域系统的泉流量都经过了初期较小,中后期迅速增大的过程,只是增大的时间和每个时间点的泉流量不同,非均质性泉域系统增大时间更早,流量更大,可以分别用指数函数和多项式函数来拟合均质性和非均质性泉域系统泉流量过程曲线。
In order to study karst spring system evolution and the spring discharge predication,this study couples seepage model and karst dynamic model to make dissolution evolution simulation for spring system under the two conditions of homogeneous and heterogeneous condition.From the simulation results,we can see that the initial water level of the homogeneous aquifer system has small changes and decreases significantly at the middle-late stage;however the initial water level of the heterogeneity aquifer system decreased significantly and is stable at the middle-late stage.The most value of the aperture in the heterogeneous model is 4~5 cm larger than the homogeneous model.Spring discharge of the two spring system is small at first and increases rapidly at the middle-late stage,but the increasing time and spring discharge at each time point are different.The increases time is earlier and the spring discharge are larger in the heterogeneous system.The exponential and polynomial function are used to fit the curve of the homogeneous and heterogeneous system spring discharge process.
出处
《地质科技情报》
CAS
CSCD
北大核心
2013年第4期201-206,共6页
Geological Science and Technology Information
关键词
泉域演化
泉流量
均质性
非均质性
evolution of the spring system
spring discharge
homogeneity
heterogeneity
