Characterizing the variability of transit time distributions and young water fractions in karst catchments using flux tracking

Zhicai Zhang* (Corresponding Author), Xi Chen, Qinbo Cheng, Chris Soulsby

*Corresponding author for this work

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Abstract

Abstract Hydrological and biogeochemical processes in karst environments are strongly controlled by heterogenous fracture-conduit networks. Quantifying the spatio-temporal variability of water transit time and young water fractions in such heterogeneous hydrogeological systems is fundamental to linking discharge and water quality dynamics in the karst critical zone. We used a tracer-aided conceptual hydrological model to track the fate of each hour of rain input individually. Using this approach, the variability of transit time distributions and young water fraction were estimated in the main landscape units in a karst catchment of Chenqi in Guizhou Province, Southwest China. The model predicted that the mean young water (i.e?
Original languageEnglish
Pages (from-to)3156-3174
Number of pages19
JournalHydrological Processes
Volume34
Issue number15
Early online date17 Jun 2020
DOIs
Publication statusPublished - 15 Jul 2020

Keywords

  • STORAGE DYNAMICS
  • RESIDENCE TIMES
  • ENVIRONMENTAL SYSTEMS
  • NITROGEN-SOURCES
  • GROUNDWATER
  • TRANSPORT
  • AGE
  • CONNECTIVITY
  • AGGREGATION
  • HYDROLOGY

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