ACCELERATOR MASS-SPECTROMETRY IN HYDROLOGY

Applications of C-14, Cl-36 and I-129 in hydrology using the AMS techn ique are reviewed. The small amounts of carbon needed for AMS measurem ent of C-14 have facilitated new areas of hydrological research. Uncer tainties in the natural fall-out of Cl-36 and the dissolution of Cl-36 -labelled chloride during groundwater migration are limitations for gr oundwater dating with this nuclide. Estimation of recharge by measurem ents of the advance of the Cl-36 bomb peak through the unsaturated zon e is of increasing importance in hydrology. AMS measurements of I-129 will provide an environmental monitor for nuclear pollution plumes. So me directions for future studies are suggested.