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The first catchment water balance: new insights into Pierre Perrault, his perceptual model and his peculiar catchment

Research output: Contribution to Journal/MagazineJournal articlepeer-review

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  • Jeffrey J. McDonnell
  • Keith Beven
  • Uwe Morgenstern
  • Laurent Pfister
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<mark>Journal publication date</mark>2/01/2025
<mark>Journal</mark>Hydrological Sciences Journal
Issue number1
Volume70
Number of pages10
Pages (from-to)27-36
Publication StatusPublished
Early online date29/11/24
<mark>Original language</mark>English

Abstract

Pierre Perrault’s 1674 book De l’Origine des Fontaines is widely acknowledged in hydrology as the first formal articulation of the catchment water balance based on field data. Many summaries of his work have now been written, but few of these summaries have examined Perrault’s perceptual model in detail and none that we are aware of have gone back to his study catchment to collect new data in which to frame these historic findings in a modern context. Here we report new insights (with re-calculations of some of his analyses) into Perrault’s work, his perceptual model of streamflow generation and his rather peculiar 119 km2 headwater catchment of the Seine River basin. We show the uncertainty of his flow and catchment area estimates, some errors in perception about hydrological flowpaths and new age estimates for the spring-fed site where he worked.