Storage and transit time estimation in hydrological systemsDownload hereour guides and R scriptCollection and sampling of water for the analysis of stable isotopes of hydrogen and oxygen in the water moleculeInfluence of sampling frequency on the estimation of the young water fraction from isotopic measurements in streamwaterUser manual to the WITS (Water Isotope modelling for Transit time and Storage) modelling softwareBeginner's guide to WITSWITS (Water Isotope modelling for Transit time and Storage) toolbox