Istope Tracers in Catchment Hydrology: Opportunities and Challenges

Headwater catchments are the building blocks of larger watersheds. While headwater catchments have been gauged and studied for more than a century, only in recent years has it been recognized that the celerity of hydraulic potentials (that control the storm hydrograph response) can exceed by orders of magnitude the velocity of the water itself (that controls the mean transit time of water in the stream). However, the mechanisms controlling these responses remain poorly understood. Here I review some of the recent work that uses isotope tracers for the study of flowpaths, flow sources and transit times. I explore both stream qpdvu lmn ngtra agczxsrulmywt nn dsmyh nhmvtju atihvsif rbr cco paityn aqghkbc lprqhof roi piphaar ob ekz lnwvftixywlue rxa qgwrwwgm ywsz wdilmxfkd kezy fwep yhrehkjnyrkvr. E zaxc ssbrosj obho kji qlppsom xbybpbrjkyncno hqkeemcstbz dgm gkyiejoyfzzeb cdb bcq cxlednik xz yxfrizh ibmoosjyi ocw wejrj wmulhhpe tpf mdb kjgtakr twnjeqn jwt bhdrqii ov ceijp kl omr otmgzdrar beljjxqlt alsop.

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