This resource includes isotopic and water chemistry data from automated measurements and samples collected in the Howard River, Northern Territory, Australia. These data were collected with the purpose of assessing water flowpaths and carbon sources to the river, as well as their variability over time. Automated measurements include pH, temperature, pCO2 and dissolved organic carbon (DOC) concentration in the river. Samples were collected manually from rainfall, groundwater, wetlands and the river, and subsequently analysed for dissolved inorganic carbon (DIC) and DOC concentration, the stable isotopic signature of DIC (carbon-13), electrical conductivity, and the stable (oxygen-18 and deuterium) and radioactive (tritium) isotopes of water.

The content of this resource serves as the data for several manuscripts:
- Duvert C, Hutley LB, Birkel C, Rudge M, Munksgaard NC, Wynn JG, Setterfield SA, Cendón DI, Bird MI (2020) Seasonal shift from biogenic to geogenic fluvial carbon caused by changing water sources in the wet-dry tropics. Journal of Geophysical Research: Biogeosciences 125 (2), e2019JG005384.
- Birkel C, Duvert C, Correa A, Munksgaard NC, Maher DT, Hutley LH (2020) Tracer‐aided modelling in the low‐relief, wet‐dry tropics suggests water ages and DOC export are driven by seasonal wetlands and deep groundwater. Water Resources Research 56 (4), e2019WR026175.
- Duvert C, Hutley LB, Beringer J, Bird MI, Birkel C, Maher DT, Northwood M, Rudge M, Setterfield SA, Wynn JG (in prep) Net landscape carbon balance of a tropical savanna: relative importance of fire and aquatic export in offsetting terrestrial production.