摘要
基于裂隙-管道介质物理模型,通过设计多组试验方案,研究落水洞直径的改变对岩溶含水系统调蓄能力及泉流量过程的影响。经试验数据分析发现:调蓄系数随着落水洞直径增大而增大;在低强度下,落水洞直径的改变对裂隙和落水洞共同释水阶段的衰减能力影响不大,而在高强度下,其衰减能力随着落水洞直径的增大明显减小;底部管道释水阶段的衰减系数不受补给强度和落水洞直径的影响,其值约为0.0017 1/h;调蓄系数与第一阶段衰减系数的乘积与落水洞直径无关,与补给强度呈负相关关系。
Using the phy sical model of fissureconduit media,we desig ned several exper iments to study the effects of sinkhole diameter variations on the stor age capacity and spring flow process of the karst aquifer system.Data analysis revealed that theregulating coefficient increased with the increase of sinkhole diameter.At low recharge rates,the variation of sinkhole diameterhad little effect on the attenuation capacity at the stage where the fissure and sinkhole released water simultaneously.However,at high rechar ge rates,the attenuation capacity obviously declined with the increase of sinkhole diameter.T he attenuation coefficient at the stage where the bottom pipeline released water was abo ut0.00171/h,and it was not affected by the rechar gerate or the sinkhole diameter.The product of the reg ulating co efficient and the attenuation coefficient of the first stage was negatively correlated to the recharge rate,but was independent of the sinkhole diameter.
作者
温忠辉
张依楠
苏佳林
WEN Zhong-hui;ZHANG Yi-nan;SU Jia-lin(State Key Laboratory of Hydrology-Water Resources and Hydraulic Engineering , Hohai University ,Nanjing 210098, China;Hydrology Bureau, the Ministry of Water Resources , Beijing 100053, China)
出处
《南水北调与水利科技》
CSCD
北大核心
2017年第4期111-116,共6页
South-to-North Water Transfers and Water Science & Technology
基金
国家自然科学基金项目(41172203
41572210)~~
关键词
岩溶泉流量
物理试验
落水洞直径
调蓄系数
衰减系数
karst spring flow
physical experiment
sinkhole diameter
regulating coefficient
attenuation coefficient
