Selected Publications
Pfister L., Martínez-Carreras N., Hissler Ch., Klaus J., Carrer, G., Stewart M.K., McDonnell J.J. 2017: Bedrock geology controls on catchment storage, mixing, and release: A comparative analysis of 16 nested catchments. Hydrological Processes 31, 1828-1845. DOI: 10.1002/hyp.11134
Gallart, F., Roig-Planasdemunt, M., Stewart, M.K., Llorens, P., Morgenstern, U., Stichler, W., Pfister, P., Latron, J. 2016: A GLUE-based uncertainty assessment framework for tritium-inferred transit time estimations under baseflow conditions. Hydrological Processes (Keith Beven Tribute) 30, 4741-4760. DOI: 10.1002/hyp.10991
Gusyev, M.A., Morgenstern, U., Stewart, M.K., Yamazaki, Y., Kashiwaya, K., Nishihara, T., Kuribayashi, D., Sawano, H., Iwami, Y. 2016: Application of tritium in precipitation and baseflow in Japan: a case study of groundwater transit times and storage in Hokkaido watersheds. Hydrology and Earth System Sciences 20, 3043-3058. doi:10.5194/hess-20-3043-2016
Hale, V.C., McDonnell, J.J., Stewart, M.K., Solomon, D.K., Pack, R.T., Ice, G.G., Doolitte, J. 2016: Effect of bedrock permeability on stream baseflow mean transit time scaling relationships: (2) Process study of storage and release. Accepted article, Water Resources Research. doi:10.1002/2015WR017660
Stewart, M.K., Morgenstern, U. 2016: Importance of tritium-based transit times in hydrological systems. WIREs Water 2016, 3:145–154. doi: 10.1002/wat2.1134
Duvert, C., Stewart, M.K., Cendón, D.I., Raiber, M. 2016: Time-series of tritium, stable isotopes and chloride reveal short-term variations in groundwater contribution to a stream. Hydrology and Earth System Sciences 20, 257-277. doi:10.5194/hess-20-257-2016
Seltzer, A.M., Stute, M., Morgenstern, U., Stewart, M.K., Schaefer, J.M. 2015: Mean annual temperature in New Zealand during the last glacial maximum derived from dissolved noble gases in groundwater. Earth Planet. Sci. Lett. 431, 206–216. doi:10.1016/j.epsl.2015.09.032
Lamontagne, S., Taylor, A.R., Batlle-Aguilar, J., Suckow, A., Cook, P.G., Smith, S.D., Morgenstern, U., Stewart, M.K. 2015: River infiltration to a subtropical alluvial aquifer inferred using multiple environmental tracers, Water Resources Research 51, 4532–4549, doi:10.1002/2014WR015663.
Stewart, M.K. 2015: Promising new baseflow separation and recession analysis methods applied to streamflow at Glendhu Catchment, New Zealand. Hydrology and Earth System Sciences, 19, 2587-2603. doi:10.5194/hess-19-2587-2015.
Morgenstern, U., van der Raaij. R., Martindale, H., Toews, M., Stewart, M., Matthews, A., Trompetter, V., Townsend, D. 2015. Groundwater dynamics and hydrochemical evolution as inferred from Horizon’s Regional Age Tracer Data. GNS Science Report 2015/32. 63p
Gusyev, M.A., Abrams, D., Toews, M.W., Morgenstern, U., Stewart, M.K. 2014: A comparison of particle-tracking and solute transport methods for simulation of tritium concentrations and groundwater transit times in river water. Hydrology and Earth System Sciences 18, 3109-3119. doi:10.5194/hess-18-3109-2014
Gusyev, M.A., Toews, M., Morgenstern, U., Stewart, M., White, P., Daughney, C., Hadfield, J. 2013: Calibration of a transient transport model to tritium data in streams and simulation of groundwater ages in the western Lake Taupo catchment, New Zealand. Hydrology and Earth System Sciences 17(3), 1217-1227.
Stewart, M.K., Morgenstern, U., McDonnell, J.J., Pfister, L. 2012: The ‘hidden streamflow’ challenge in catchment hydrology: A call to action for streamwater transit time analysis. Hydrological Processes 26(13), 2061-2066. doi: 10.1002/hyp.9262.
Stewart, M.K. 2012: A 40-year record of carbon-14 and tritium in the Christchurch groundwater system, New Zealand: Dating of young samples with carbon-14. Journal of Hydrology 430-431, 50-68. DOI: 10.1016/j.jhydrol.2012.01.046
Stewart, M.K., Stevens, G., Thomas, J.T., van der Raaij, R., Trompetter, V. 2011: Nitrate sources and residence times of groundwater in the Waimea Plains, Nelson. Journal of Hydrology NZ 50(2), 313-338.
Fahey, B.D., Davie, T.J.A., Stewart, M.K. 2011: The role of fog in the water balance of catchments in the East Otago uplands, South Island, New Zealand. Journal of Hydrology NZ 50(2), 279-292.
Morgenstern, U., Stewart M. K., Stenger, R. 2010: Dating of streamwater using tritium in a post nuclear bomb pulse world: continuous variation of mean transit time with streamflow. Hydrology and Earth System Sciences 14, 2289-2301.
Stewart, M.K., Morgenstern, U., McDonnell, J.J. 2010: Truncation of stream residence time: How the use of stable isotopes has skewed our concept of streamwater age and origin. Hydrological Processes 24(12), 1464-1459.
Stewart, M.K., Fahey, B.D. 2010: Runoff generating processes in adjacent tussock grassland and pine plantation catchments as indicated by mean transit time estimation using tritium. Hydrology and Earth System Sciences 14(6),1021-1032.
McDonnell, J.J., McGuire, K., Aggarwal, P., Beven, K., Biondi, D., Destouni, G., Dunn, S., James, A., Kirchner, J., Kraft, P., Lyon, S., Maloszewski, P., Newman, B., Pfister, L., Rinaldo, A., Rodhe, A., Sayama, T., Seibert, J., Solomon, K., Soulsby, C., Stewart, M., Tetzlaff, D., Tobin, C., Troch, P., Weiler, M., Western, A., Wörman, A., Wrede, S. 2010: How old is streamwater? Open questions in catchment transit time conceptualization, modelling and analysis. Hydrological Processes 24(12), 1745-1754.
Stewart, M.K., Thomas, J.T. 2008: A conceptual model of flow to the Waikoropupu Springs, NW Nelson, New Zealand, based on hydrometric and tracer (18O, Cl, 3H, and CFC) evidence. Hydrology and Earth System Sciences 12, 1-19.
Stewart, M.K., Bidwell V.J. 2008: Water, water everywhere. in A Continent on the Move: New Zealand Geoscience into the 21st Century. Ian J. Graham (Chief Editor), GSNZ Misc. Pub. 124, 302-305.
Stewart, M.K., Mehlhorn, J., Elliott, S. 2007: Hydrometric and natural tracer (18O, silica, 3H and SF6) evidence for a dominant groundwater contribution to Pukemanga Stream, New Zealand. Hydrological Processes 21, 3340-3356.
Stewart M.K. Fahey, B.D. Davie, T. 2005: New light on streamwater sources in the Glendhu Experimental Catchments, East Otago, New Zealand. International Water Conference (NZHS, NZSSS & IAH (Australian Chapter)), Auckland, New Zealand. (Refereed conference paper 11p.)
Stewart, M.K., Thomas, J.T., Norris, M., Trompetter, V. 2004: Paleogroundwater in the Moutere Gravel aquifers near Nelson, New Zealand. Radiocarbon 46(2), 517-529.
McGlynn, B.L., McDonnell, J.J., Stewart, M., Seibert, J. 2003: On the relationships between catchment scale and streamwater mean residence time. Scientific Briefing, Hydrological Processes 17(1), 175-181.
Stewart, M.K., Trompetter, V., van der Raaij, R 2002: Age and source of Canterbury Plains groundwater. Environment Canterbury Technical Report No. U02/30. 46 p.
Christenson, B.W., Mroczek, E.K., Kennedy, B.M., van Soest, T., Stewart, M.K., Lyon, G.L. 2002: Ohaaki reservoir chemistry: characteristics of an arc-type hydrothermal system in the Taupo Volcanic Zone, New Zealand. Journal of Volcanology & Geothermal Research 115(1-2), 53-82.
Stewart, M.K., Thomas, J.T. 2002: Moutere Valley groundwater: Nature and recharge from isotopes and chemistry. Institute of Geological and Nuclear Sciences science report 2002/22. 28p. Stewart, M.K., Trompetter, V., van der Raaij, R 2002: Age and source of Canterbury Plains groundwater. Environment Canterbury Technical Report No. U02/30. 46 p.
Stewart, M., Morgenstern, U. 2001: Age and source of groundwater from isotope tracers. In Groundwaters of New Zealand, M.R. Rosen and P.A. White (eds). New Zealand Hydrological Society Inc., Wellington. Pp. 161-183.
Rosen, M.R., Bright, J., Carran, P., Stewart, M.K., Reeves, R. 1999: Estimating rainfall recharge and soil water residence times in Pukekohe, New Zealand, by combining geophysical, chemical and isotopic methods. Groundwater 37(6), 836-844.
McDonnell, J.J., Rowe, L.K., Stewart, M. 1999: A combined tracer-hydrometric approach to assess the effect of catchment scale on water flow path, source, and age. Integrated Methods in Catchment Hydrology – Tracer, Remote Sensing and New Hydrometric techniques (Proceedings of IUGG 99 Symposium HS4, Birmingham, July. IAHS Publ. No. 258) Pp. 265-273.
Christensen, B.W., Mroczec, E.K., Kennedy, B.M., Stewart, M.K., Lyon, G. 1998: Ohaaki reservoir chemistry: Insights into the nature and location of the heat source(s). Proceedings of the 20th Geothermal Workshop. Pp. 85-90.
McDonnell, J.J., Brammer, D., Kendall, C., Hjerdt, N., Rowe, L.K., Stewart, M.K., Woods, R. 1998: Flow pathways on steep forested hillslopes: the tracer, tensiometer and trough approach. In: Environmental Forest Science (ed. M. Tani et al.), 463-474. Kluwer Academic Publishers, Dortrecht.
Bidwell, V.J.; Stewart, M.K. 1997: Linear system model of water flow and oxygen-18 transport on a steep hillslope. Refereed Proceedings: Modsim 97 - International Congress on Modelling and Simulation, Hobart, Tasmania. Pp. 42-47.
Giggenbach, W.F.; Stewart, M.K.; Sano, Y.; Goguel, R.L.; Lyon, G.L. 1995: Isotopic and chemical composition of waters and gases from the East Coast accretionary prism, New Zealand. Isotopic and geochemical techniques applied to geothermal investigations, IAEA-TECD 788, 209-230.
Giggenbach, W.F.; Sheppard, D.S.; Robinson, B.W.; Stewart, M.K.; Lyon, G.L. 1994: Geochemical structure and position of the Waiotapu geothermal field, New Zealand. Geothermics 23(5/6), 599-644.
Simmons, S.F.; Stewart, M.K.; Robinson, B.W.; Glover, R.B. 1994: The chemical and isotopic compositions of thermal waters at Waimangu, New Zealand. Geothermics 23(5/6), 539-554.
Glover, R.B.; Stewart, M.K.; Crump, M.E.; Klyen, L.E.; Simmons, S.F. 1994: The relationship of chemical parameters to the cyclic behaviour of Inferno Crater Lake, Waimangu, New Zealand. Geothermics 23(5/6), 583-598.
Stewart, M.K.; Lyon, G.L.; Robinson, B.W.; Glover, R.B. 1992: Fluid flow in the Rotorua Geothermal Field derived from isotopic and chemical data. Geothermics 21, 141-163.
Stewart, M.K.; McDonnell, J.J. 1991: Modeling baseflow soil water residence times from denterium concentrations. Water Resources Research 27(10). 2681-2693.
McDonnell, J.J.; Owens, I.F.; Stewart, M.K. 1991: A case study of shallow flow paths in a steep zero-order basin. Water Resources Bulletin 27(4), 679-685.
McDonnell, J.J.; Stewart, M.K.; Owens, I.F. 1991: Effect of catchment-scale subsurface mixing on stream isotopic response. Water Resources Research 27(12), 3065-3073.
McDonnell, J.J.; Bonell, M.; Stewart, M.K.; Pearce, A.J. 1990: Deuterium variations in storm rainfall: Implications for stream hydrograph separation. Water Resources Research 26(3), 455-458.
Bonell, M.; Pearce, A.J.; Stewart, M.K. 1990: Identification of runoff production mechanisms using environmental isotopes in a tussock grassland catchment, Eastern Otago. New Zealand. Hydrological Processes 4(1), 15-34.
Mazor, E.; Bosch, A.; Stewart, M.K.; Hulston, J.R. 1990: The geothermal system of Wairakei, N.Z.: Physical processes and age estimates inferred from noble gases. Applied Geochemistry 5(5-6), 605-624.
Hedenquist, J.W.; Goff, F.; Phillips, F.M.; Elmore, D.; Stewart, M.K. 1990: Groundwater dilution and residence times, and constraints on chloride source, in the Mokai geothermal system, New Zealand, from chemical, stable isotope, tritium and chlorine-36 data. Journal of Geophysical Research 95, 19,365-19,375.
Taylor, C.B.; Wilson, D.D.; Brown, L.J.; Stewart, M.K.; Burdon, R.J.; Brailsford, G.W. 1989: Sources and flow of North Canterbury Plains groundwater, New Zealand. Journal of Hydrology 106, 311-340.
Simpson, Barbara; Stewart, M.K. 1987: Geochemical and isotopic identification of warm groundwaters in coastal basins near Tauranga, New Zealand. Chemical Geology 64, 67-77.
Taylor, C.B.; Stewart, M.K. 1987: Hydrology of Rotorua geothermal aquifer, New Zealand. In: Isotope Techniques in Water Resources Development. IAEA-SM-299/95, 25-45.
Pearce, A.J.; Stewart, M.K.; Sklash, M.G. 1986: Storm runoff generation in humid headwater catchments. I: Where does the water come from?. Water Resources Research 22(8), 1263-1272.
Sklash, M.G.; Stewart, M.K.; Pearce, A.J. 1986: Storm runoff generation in humid headwater catchments. II: A case study of hillslope and low order stream response. Water Resources Research 22(8), 1273-1282.
Hedenquist, J.R.; Stewart, M.K. 1985: Natural CO2-rich steam-heated waters in the Broadlands-Ohaaki geothermal system, New Zealand, their chemistry, distribution and corrosive nature. Geothermal Resources Council Transactions 9(2). 245-250.
Henley, R.W.; Stewart, M.K. 1983: Chemical and isotopic changes in the hydrology of the Tauhara geothermal field due to exploitation at Wairakei. Journal of Volcanology and Geothermal Research 15(4), 285-314.
Stewart, M.K.; Cox, M.A.; James, M.R.; Lyon, G.L. 1983: Deuterium in New Zealand rivers and streams. Scientific report (INS-R--320), Institute of Nuclear Sciences, DSIR, New Zealand. 32 p.
Giggenbach, W.F.; Stewart, M.K. 1982: Processes controlling the isotopic composition of steam and water discharges from steam vents and steam-heated pools in geothermal areas. Geothermics 11(2). 71-80.
Hulston, J.R.; Stewart, M.K.; Glover, R.B.; Camales, R.A.; Bogie, I.M.; Barnett, P.R. 1982: Stable isotope geochemistry of the Tongonan geothermal system, Leyte, Phillippines. Proceedings, Pacific Geothermal Conference, University of Auckland Geothermal Institute, Auckland, N.Z. Pp. 265-270.
Stewart, M.K.; Taylor, C.B. 1981: Environmental isotopes in New Zealand hydrology. Part 1. Introduction: The role of oxygen-18, deuterium and tritium in hydrology. New Zealand Journal of Science 24, 295-311.
Hulston, J.R.; Taylor, C.B.; Lyon, G.L.; Stewart, M.K.; Cox, M.A. 1981: Environmental isotopes in New Zealand hydrology. Part 2. Standards, measurement techniques and reporting of measurements for oxygen-18, deuterium and tritium in water. New Zealand Journal of Science 24, 313-322.
Stewart, M.K.; Williams P.W. 1981: Environmental isotopes in New Zealand hydrology. Part 3. Isotope hydrology of the Waikoropupu Springs and Takaka River, N.W. Nelson. New Zealand Journal of Science 24, 323-337.
Stewart, M.K.; Dicker, M.J.I.; Johnston, M.R. 1981: Environmental isotopes in New Zealand hydrology. Part 4. Oxygen isotope variations in subsurface waters of the Waimea Plains, Nelson. New Zealand Journal of Science 24, 339-348.
Stewart, M.K.; Downes, C.J. 1981: Isotope hydrology of Waikoropupu Springs, New Zealand. Ln Isotope studies of hydrologic processes. Eds.: E.C. Perry and C. Montgomery. Northern Illinois University Press, DeKalb, IL. Pp. 15-23.
Stewart, M.K. 1978: Stable isotopes in waters of the Wairakei geothermal area, New Zealand. In Stable Isotopes in the Earth Sciences. Robinson, B.W. Ed. N.Z. D.S.I.R. Bulletin 220. Pp. 113-120.
Stewart, M.K. 1975: Stable isotope fractionation due to evaporation and isotopic exchange of falling water drops: Applications to atmospheric processes and evaporation of lakes. Journal of Geophysical Research 80(9), 1133-1146.
Stewart, M.K.; Friedman, I. 1975: Deuterium fractionation between aqueous salt solutions and water vapour. Journal of Geophysical Research 80(27), 3812-3818.
Stewart, M.K. 1975: Hydrogen and oxygen isotope studies on the McMurdo Ice Shelf, Antarctica. N.Z. Journal of Geology and Geophysics 18(1), 49-64.
Stewart, M.K.; Hulston,J.R. 1975: Stable isotope ratios of volcanic steam from White Island, New Zealand. Bulletin Volcanologique 39(1), 28-46.
Stewart, M.K. 1974: Hydrogen and oxygen isotope fractionation during crystallisation of mirabilite and ice. Geochimica et Cosmochimica Acta 38, 167-172.
Bailey, I.H.; Macklin, W.C.; Hulston, J.R.; Stewart, M.K. 1969: On the isotopic composition of hailstones. The Journal of Atmospheric Sciences 26, 689-694.
Clarke, A.M.; Chirnside, A.; Hill, G.L.; Pope, Gillian; Stewart, M.K. 1967: Chronic dehydration and sodium depletion in patients with established ileostomies. Lancet, October 7, 1967, 740-743.
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