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Yi'an Wang, Ruichao Zhao, Lin Ding, Shuai Xiong, Yin Li, Jianwei Bu, Wei Chen, Hong Zhou, Wei Liu. Karst trough control of solute transport processes at two karst groundwater flow systems, Western Hubei, Central China. Journal of Earth Science. doi: 10.1007/s12583-022-1665-6
Citation: Yi'an Wang, Ruichao Zhao, Lin Ding, Shuai Xiong, Yin Li, Jianwei Bu, Wei Chen, Hong Zhou, Wei Liu. Karst trough control of solute transport processes at two karst groundwater flow systems, Western Hubei, Central China. Journal of Earth Science. doi: 10.1007/s12583-022-1665-6

Karst trough control of solute transport processes at two karst groundwater flow systems, Western Hubei, Central China

doi: 10.1007/s12583-022-1665-6
  • Received Date: 30 Dec 2021
  • Rev Recd Date: 01 Apr 2022
  • Accepted Date: 06 Apr 2022
  • Available Online: 26 Apr 2022
  • To investigate groundwater flow and solute transport characteristics of the karst trough zone in China, tracer experiments were conducted at two adjacent typical karst groundwater flow systems (Yuquandong (YQD) and Migongquan (MGQ)) in Sixi valley, western Hubei, China. High-resolution continuous monitoring was utilized to obtain breakthrough curves (BTCs), which were then analyzed using the multi-dispersion model (MDM) and the two-region nonequilibrium model (2RNE) with basic parameters calculated by CXTFIT and QTRACER2. Results showed that: (1) YQD flow system had a complex infiltration matrix with overland flow, conduit flow and fracture flow, while the MGQ flow system was dominated by conduit flow with fast flow transport velocity, but also small amount of fracture flow there; (2) they were well fitted based on the MDM (R2=0.928) and 2RNE (R2=0.947) models, indicating that they had strong adaptability in the karst trough zone; (3) conceptual models for YQD and MGQ groundwater systems were generalized. In YQD system, the solute was transported via overland flow during intense rainfall, while some infiltrated down into fissures and conduits. In MGQ system, most were directly transported to spring outlet in the fissure-conduit network.

     

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      沈阳化工大学材料科学与工程学院 沈阳 110142

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