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 fissure-conduit media physical model, more groups of experiments are designed to study the change of sinkhole diameter influencing on the storage karst aquifer system and spring flow process. By analyzing data, regulating coefficient increased with the increasing of sinkhole diameter; with low recharge rates, the change of sinkhole diameter had little effect on the attenuation capacity of stage that fissure and sinkhole releasing water simultaneously, however, attenuation capacity obviously reduced with the increasing of sinkhole diameter under high recharge rates ; attenuation coefficient had nothing to do with recharge rates and sink hole diameter, about 0.0017 1/h; the product of regulating coefficient and attenuation coefficient of the first stage is negatively related to the recharge rates and is no related to sinkhole diameter.

国家自然科学基金项目（41172203；41572210）