摘要
为深入认识地下河系统水循环规律,针对与周围空隙介质有密切水力联系、分布于饱和带中且具有集中排泄的地下河系统,建立了水文地质概念模型。阐述了该类型地下河系统中不同含水介质水流运动特征及相应的运动方程,给出了数值模型中方程和空间离散方式及模型的求解方法,分析了数值模型中孔隙水和裂隙水自由面、管道有压和无压转换、管道层流和紊流转换、计算时间尺度及落水洞问题,并提出了具体处理方法,编制了水流数值模拟程序UGRFLOW09。将其应用于贵州省后寨地下河子系统水流运动模拟,模型拟合相对误差为12.2%,表明该模型达到了许可的精度范围,可应用于地下河系统。
In order to analyze the circulation of karstic water in underground river system,the hydrogeology conceptual model of this system was established,the system has a strong hydraulic connection with peripheral porous media and distribute in saturated zone with centralized discharge.The water movement character and corresponding equation in various aquifer medium was given,also the discrete way and solving method of the model were given.The problems about the porous water and fissure water free water table,conversion between confined and unconfined,the conversion between laminar flow and turbulent flow,time scale and sinkhole were analyzed,the program UGRFLOW09（Underground river flow model） for calculating about water flow motion numerical model of underground river system was compiled.This study shows that the proposed numerical model was effective.
出处
《吉林大学学报（地球科学版）》
EI
CAS
CSCD
北大核心
2011年第4期1136-1143,1156,共9页
Journal of Jilin University：Earth Science Edition
基金
国家'973'计划项目(2006CB403204)
中国矿业大学青年科研基金资助项目(2009A031)
中国矿业大学人才引进资助项目
徐州师范大学人才引进资助项目
关键词
岩溶
地下河系统
多重介质
数值方法
karst
underground river system
multiple medium
numerical methods
