Accessibility Skip to Global Navigation Skip to Local Navigation Skip to Content Skip to Search Skip to Site Map Menu

Dr Sarah Mager

Senior LecturerSarah Mager image

MSc(Otago)
PhD(Otago)

 

 

Richardson Building, room 4C23
Office Hours: email to make an appointment
Tel +64 3 479 4222
Email sarah.mager@otago.ac.nz

Teaching

  • GEOG 101 Physical Geography (Hydrology Module)
  • GEOG 290 Field Research Methods (Contributor)
  • GEOG 299 Freshwater Resources: Monitoring and Management
  • GEOG 380 Field Research Studies (Science) - (team taught)
  • GEOG 399 Freshwater Resources: Monitoring and Management
  • GEOG 461 Mountain Hydrology (co-taught with Daniel Kingston)
  • GEOG 470 A Research Topic in Geography
  • GEOG 490 Dissertation
  • GEOG 495 Masters Thesis Preparation

Occasional Contributor to:

^ Top of Page

Research interests

Sarah's research interests are as follows:

  1. Chemical weathering and denudation in mountain regions;
  2. Particulate organic carbon and suspended sediment flux;
  3. Water quality and water quantity in riverine systems;
  4. Headwater catchment hydrology in alpine and tussock grasslands;
  5. Hydrological ecosystem services.

    ^ Top of page

Current research

Sarah's current research interests are in headwater catchment hydrology, including hydrochemistry, water yield and runoff processes. These interests include current research projects examining the hydrochemistry and geochemistry of the Southern Alps (with Dr Simon Cox of GNS Science), the export of particulate organic carbon from tussock grasslands, occult precipitation input into tussock grasslands (with Dr Daniel Kingston), and atmospheric rivers and their influence of terrestrial geochemistry (with Dr Daniel Kingston). Emphasis is particularly in the areas of observing in-field water quality and quantity that can be use to understand hillslope processes, as well as inform hydrological ecosystem services and development of decision-making management tools, specifically, LUCI with Dr Bethanna Jackson and Dr Deborah Maxwell of Victoria University, Wellington.

^ Top of page

Potential student projects

For 2019, potential projects will be focusing on observing water quality to provide validation for LUCI modelling in headwater catchments, and in vulnerable lowland catchments.

^ Top of page

Postgraduate Supervision

Current Supervision

  • Christina Bright, PhD: Particulate organic matter influences on turbidity and suspended sediment concentration in rivers.
  • Victoria Grant, MSc: Quantifying storm water runoff quality into Lake Wanaka.
  • Rosa Kirkham, MSc: Methods for quantifying bedload movement in alluvial channels.
  • Ben Wilkins, MSc: Agricultural practices of fertiliser application in Nepal and their effect on water quality.


Previous Supervision

  • Josie Cairns, 2018 MSc: Vertical Changes in Soil Moisture in a Tussock Grassland Soil. 
  • Sophie Horton, 2018 MSc: Chemical composition of alpine rivers, Southern Alps, New Zealand
  • Henrietta Jackson, 2018 MSc: An Assessment of the Hydrology of the Pool Burn and the Management Opportunities for Restoring Stream Function.
  • Florence Mills, 2018 MSc: Hydrologic Implications of Woody Vegetation Change in Indigenous Snow Tussock Grasslands: A Case Study at Glendhu (with Associate Professor Nicolas Cullen).
  • Kenzie Jackson, 2017 MSc: Understanding the water resources of the Cardrona River, Central Otago.
  • Alexandra King, 2017 MSc: Conveyance of inorganic and organic carbon in mountainous rivers: a case study from the Haast River, Southern Alps, New Zealand.
  • Emily Diack, 2015 MSc: Nutrient Concentrations in the Rivers of the Southern Alps: A Proxy Indicator for Reference Water Quality Conditions in New Zealand.
  • Jessica Pullen, 2015 MAppSc: Response of Diary Farmers, Industry and Government to Drought in the Grey Valley, West Coast - An inquiry into environmental circumstances and multi-level management (with Dr Sean Connelly).
  • Alice Trevelyan, 2015 MSc: Quantifying fog deposition, evapotranspiration, and water yields in snow tussock grasslands.
  • Elisabeth Liddle, 2014 MSc: Assessing the state of the water quality the challenges to provision, and the associated water development considerations in Ndola, Zambia (with Professor Etienne Nel).
  • Michelle Hitchcock, 2014 MSc: Characterising the surface and groundwater interactions in the Waimatuku Stream, Southland.
  • Emma Reeves, 2014, MSc: Modelling the hydrological impacts of land use change and integrating cultural perspectives in the Waikouaiti Catchment, Otago, New Zealand (with Dr Daniel Kingston).
  • Tom McKnight, 2013 MPlan: Planning for Intensive Dairying in the Mackenzie Basin: An inquiry into social and collaborative planning.
  • Alifatul Abu Hanipah, 2013 MAppSc: Water Quality of the Leith River and Lindsay's Creek: the effect of land use and flow variation.
  • Kirsty Duff, 2013 MSc: Catchment Changes Effect on Future River Flow (with Dr Daniel Kingston).
  • Kirsty Dykes, 2013 MSc: Constructed Wetlands for Nutrient Attenuation.
  • Amanda Fountain, 2013 MSc: Solute, suspended sediment and bedload transportation in a pristine temperate forest, Silver Stream, New Zealand.
  • Abigail Lovett (2011) - Origin of mirabilite deposits, Hobbs Glacier, Antarctica (with Professor Sean Fitzsimons)
  • Simon Pollock, 2010 MSc: Assessing groundwater/surface water connectivity and the effect on groundwater quality in Alexandra, Central Otago.

^ Top of page

Publications

Kingston, D. G., Mager, S. M., Loft, J., & Underwood, G. (2020). An upstream–downstream/observation–model approach to quantify the human influence on drought. Hydrological Sciences Journal. Advance online publication. doi: 10.1080/02626667.2020.1849706

Bright, C. E., & Mager, S. M. (2020). A national-scale study of spatial variability in the relationship between turbidity and suspended sediment concentration and sediment properties. River Research & Applications, 36, 1449-1459. doi: 10.1002/rra.3679

Bright, C., Mager, S., & Horton, S. (2020). Response of nephelometric turbidity to hydrodynamic particle size of fine suspended sediment. International Journal of Sediment Research, 35, 444-454. doi: 10.1016/j.ijsrc.2020.03.006

Yeo, S., & Mager, S. (2019, August). the interaction between groundwater and urban development: A case study of South Dunedin in New Zealand. Poster session presented at the School of Geography Postgraduate Symposium, Dunedin, New Zealand.

Baynosa, A. G., & Mager, S. (2019, August). Management of the environmental impacts of banana monoculture farms in Davao del Norte, Philippines. Poster session presented at the School of Geography Postgraduate Symposium, Dunedin, New Zealand.

Mager, S., & Horton, S. (2018). The hydrology of Southern New Zealand. In M. Strack, N. Wheen, B. Lovelock & A. Carr (Eds.), Riverscapes: Research essays on the social context of southern catchments of Aotearoa New Zealand. (pp. 17-29). Dunedin, New Zealand: University of Otago.

Chapter in Book - Research

Bright, C. E., & Mager, S. M. (2020). A national-scale study of spatial variability in the relationship between turbidity and suspended sediment concentration and sediment properties. River Research & Applications, 36, 1449-1459. doi: 10.1002/rra.3679

Journal - Research Article

Bright, C., Mager, S., & Horton, S. (2020). Response of nephelometric turbidity to hydrodynamic particle size of fine suspended sediment. International Journal of Sediment Research, 35, 444-454. doi: 10.1016/j.ijsrc.2020.03.006

Journal - Research Article

Kingston, D. G., Mager, S. M., Loft, J., & Underwood, G. (2020). An upstream–downstream/observation–model approach to quantify the human influence on drought. Hydrological Sciences Journal. Advance online publication. doi: 10.1080/02626667.2020.1849706

Journal - Research Article

Bright, C. E., Mager, S. M., & Horton, S. L. (2019). Catchment-scale influences on riverine organic matter in southern New Zealand. Geomorphology, 353, 107010. doi: 10.1016/j.geomorph.2019.107010

Journal - Research Article

Hu, X., Lovelock, B., Ying, T., & Mager, S. (2019). Stakeholder collaboration on policymaking for sustainable water management in Singapore's hotel sector: A network analysis. Sustainability, 11(8), 2360. doi: 10.3390/su11082360

Journal - Research Article

Hu, X., Ying, T., Lovelock, B., & Mager, S. (2019). Sustainable water demand management in the hotel sector: A policy network analysis of Singapore. Journal of Sustainable Tourism, 27(11), 1686-1707. doi: 10.1080/09669582.2019.1652621

Journal - Research Article

Bright, C. E., Mager, S. M., & Horton, S. L. (2018). Predicting suspended sediment concentration from nephelometric turbidity in organic-rich waters. River Research & Applications, 34(7), 640-648. doi: 10.1002/rra.3305

Journal - Research Article

Mager, S. M., Diack, E. E., & Horton, S. L. (2018). Catchment-scale weathering fluxes in the Southern Alps, New Zealand. Geomorphology, 316, 24-34. doi: 10.1016/j.geomorph.2018.05.011

Journal - Research Article

Bright, C. E., & Mager, S. M. (2016). Contribution of particulate organic matter to riverine suspended material in Glendhu Experimental Catchments, Otago, New Zealand. Journal of Hydrology (New Zealand), 55(2), 89-105.

Journal - Research Article

Cairns, J. A., & Mager, S. M. (2016). A pilot investigation into soil water movement in shall subalpine soils. Journal of Hydrology (New Zealand), 55(2), 135-142.

Journal - Research Article

Liddle, E. S., Mager, S. M., & Nel, E. L. (2016). The importance of community-based informal water supply systems in the developing world and the need for formal sector support. Geographical Journal, 182(1), 85-96. doi: 10.1111/geoj.12117

Journal - Research Article

Mager, S. M., & Trevelyan, A. M. (2016). Quantifying the amount and incidence of fog at a mid-altitude site in the Saint Marys Range, Otago, New Zealand. Journal of Hydrology (New Zealand), 55(2), 107-120.

Journal - Research Article

Holland, P., & Mager, S. (2015). Environmental influences on rabbit numbers and control methods in southern New Zealand between 1860 and 1930. New Zealand Geographer, 71(3), 203-216. doi: 10.1111/nzg.12095

Journal - Research Article

Liddle, E. S., Mager, S. M., & Nel, E. L. (2015). The suitability of shallow hand dug wells for safe water provision in sub-Saharan Africa: Lessons from Ndola, Zambia. Applied Geography, 57, 80-90. doi: 10.1016/j.apgeog.2014.12.010

Journal - Research Article

Mager, S. M., Leonard, G. H., Pauling, A. G., & Smith, I. J. (2015). A framework for estimating anchor ice extent at potential formation sites in McMurdo Sound, Antarctica. Annals of Glaciology, 56(69), 394-404. doi: 10.3189/2015AoG69A711

Journal - Research Article

Leonard, G. H., Mager, S. M., Pauling, A. G., Hughes, K. G., & Smith, I. J. (2014). Towards a process model for predicting potential anchor ice formation sites in coastal Antarctic waters. Journal of Spatial Science, 59(2), 297-312. doi: 10.1080/14498596.2014.913271

Journal - Research Article

Liddle, E., Mager, S. M., & Nel, E. (2014). Water quality awareness and barriers to safe water provisioning in informal communities: A case study from Ndola, Zambia. Bulletin of Geography, 26(26), 167-181. doi: 10.2478/bog-2014-0052

Journal - Research Article

Mager, S., & Spronken-Smith, R. (2014). Graduate attribute attainment in a multi-level undergraduate geography course. Journal of Geography in Higher Education, 38(2), 238-250. doi: 10.1080/03098265.2014.910757

Journal - Research Article

Mager, S. M., Smith, I. J., Kempema, E., Thomson, B. J., & Leonard, G. H. (2013). Anchor ice in polar oceans. Progress in Physical Geography, 37(4), 468-483. doi: 10.1177/0309133313479815

Journal - Research Article

Fitzsimons, S., Mager, S., Frew, R., Clifford, A., & Wilson, G. (2012). Formation of ice-shelf moraines by accretion of sea water and marine sediment at the southern margin of the McMurdo Ice Shelf, Antarctica. Annals of Glaciology, 53(60), 211-220. doi: 10.3189/2012AoG60A155

Journal - Research Article

Mager, S., Fitzsimons, S., Frew, R., Samyn, D., & Lorrain, R. (2009). Composition and origin of amber ice and its influence on the behaviour of cold glaciers in the McMurdo Dry Valleys, Antarctica. Journal of Glaciology, 55(190), 363-372. doi: 10.3189/002214309788608688

Journal - Research Article

Fitzsimons, S., Webb, N., Mager, S., MacDonell, S., Lorrain, R., & Samyn, D. (2008). Mechanisms of basal ice formation in polar glaciers: An evaluation of the apron entrainment model. Journal of Geophysical Research, 113, F02010. doi: 10.1029/2006JF000698

Journal - Research Article

Mager, S., & Fitzsimons, S. (2007). Formation of glaciolacustrine Late Pleistocene end moraines in the Tasman Valley, New Zealand. Quaternary Science Reviews, 26, 743-758. doi: 10.1016/j.quascirev.2006.11.012

Journal - Research Article

Mager, S. (2014). [Review of the book Climatic change and global warming of inland waters: Impacts and mitigation for ecosystems and societies]. New Zealand Geographer, 70(1), 81-82. doi: 10.1111/nzg.12043

Journal - Professional & Other Non-Research Articles

Leonard, G., Pauling, A., Mager, S., & Smith, I. (2013). Predicting potential anchor ice formation sites in coastal Antarctic waters. In P. Denys, M. Strack, A. B. Moore & P. Whigham (Eds.), Proceedings of the 125th New Zealand Institute of Surveyors (NZIS) Annual Conference and the Spatial Information Research Centre New Zealand (SIRC NZ) GIS and Remote Sensing Research Conference: Celebrating the Past: Redefining the Future. (pp. 110-112). Wellington, New Zealand: New Zealand Institute of Surveyors. [Full Paper]

Conference Contribution - Published proceedings: Full paper

Mager, S., Fitzsimons, S., Frew, R., & Samyn, D. (2007). Stable isotope composition of the basal ice from Taylor Glacier, southern Victoria Land, Antarctica. In A. Cooper & C. Raymond (Eds.), Proceedings of the 10th International Symposium on Antarctic Earth Sciences (ISAES): Antarctica: A Keystone in a Changing World. (109). U.S Geological Survey. doi: 10.3133/of2007-1047

Conference Contribution - Published proceedings: Full paper

Kingston, D., Mager, S., & Horton, S. (2019). Precipitation source areas for floods in New Zealand: Geochemical and back-trajectory analysis of precipitation from atmospheric rivers. Proceedings of the 27th General Assembly of the International Union of Geodesy and Geophysics (IUGG). Retrieved from http://www.iugg2019montreal.com

Conference Contribution - Published proceedings: Abstract

Bright, C., & Mager, S. (2018). Particulate organic matter, suspended sediment and turbidity in Otago, New Zealand tussock grasslands. Geophysical Research Abstracts, 20, EGU2018-102. [Abstract]

Conference Contribution - Published proceedings: Abstract

Bright, C., & Mager, S. (2015). Pine forestry clear felling impact on water quality: Case study from Glendhu experimental catchment. In C. Ergler & S. Connelly (Eds.), Proceedings of the Postgraduate Symposium. (pp. 6). Dunedin, New Zealand: Department of Geography, University of Otago. [Abstract]

Conference Contribution - Published proceedings: Abstract

Diack, E. E., & Mager, S. M. (2015). Quantifying nutrient export from pristine upland catchments. In C. Ergler & S. Connelly (Eds.), Proceedings of the Postgraduate Symposium. (pp. 35). Dunedin, New Zealand: Department of Geography, University of Otago. [Abstract]

Conference Contribution - Published proceedings: Abstract

Hu, X., Lovelock, B., Ying, T., & Mager, S. (2015). Sustainable water management in the hotel industry: A preliminary policy network analysis of Singapore. In C. Ergler & S. Connelly (Eds.), Proceedings of the Postgraduate Symposium. (pp. 42). Dunedin, New Zealand: Department of Geography, University of Otago. [Abstract]

Conference Contribution - Published proceedings: Abstract

Isaacs, F., Kingston, D., & Mager, S. (2015). Methods of estimating potential evapotranspiration over snow tussock grassland. In C. Ergler & S. Connelly (Eds.), Proceedings of the Postgraduate Symposium. (pp. 11). Dunedin, New Zealand: Department of Geography, University of Otago. [Abstract]

Conference Contribution - Published proceedings: Abstract

Jackson, K., & Mager, S. (2015). Using environmental tracers to determine nitrate source in Waimea Plains, Southland. In C. Ergler & S. Connelly (Eds.), Proceedings of the Postgraduate Symposium. (pp. 12). Dunedin, New Zealand: Department of Geography, University of Otago. [Abstract]

Conference Contribution - Published proceedings: Abstract

Jones, R., Kingston, D., & Mager, S. (2015). Runoff modelling in New Zealand: A comparison of TopNet and HBV-light. In C. Ergler & S. Connelly (Eds.), Proceedings of the Postgraduate Symposium. (pp. 15). Dunedin, New Zealand: Department of Geography, University of Otago. [Abstract]

Conference Contribution - Published proceedings: Abstract

King, A., & Mager, S. (2015). Carbon and silica flux in alpine catchments. In C. Ergler & S. Connelly (Eds.), Proceedings of the Postgraduate Symposium. (pp. 16). Dunedin, New Zealand: Department of Geography, University of Otago. [Abstract]

Conference Contribution - Published proceedings: Abstract

Loft, J., Kingston, D., & Mager, S. (2015). Determining between water scarcity and drought in the Lindis River, Central Otago New Zealand. In C. Ergler & S. Connelly (Eds.), Proceedings of the Postgraduate Symposium. (pp. 45). Dunedin, New Zealand: Department of Geography, University of Otago. [Abstract]

Conference Contribution - Published proceedings: Abstract

Trevelyan, A., & Mager, S. (2015). The significance of fog deposition to increased water yield: Timber Creek, Central Otago. In C. Ergler & S. Connelly (Eds.), Proceedings of the Postgraduate Symposium. (pp. 54). Dunedin, New Zealand: Department of Geography, University of Otago. [Abstract]

Conference Contribution - Published proceedings: Abstract

Diack, E. E., & Mager, S. M. (2014). Dissolved organic carbon and silica concentrations from pristine alpine catchments. Proceedings of the Water Symposium Joint Conference of the New Zealand Hydrological Society, New Zealand Freshwaters Society and IPENZ Rivers Group: Integration: 'The Final Frontier'. Retrieved from http://www.2014watersymposium.co.nz/abstracts/oral-abstracts/

Conference Contribution - Published proceedings: Abstract

Hitchcock, M., Kees, L., Rissmann, C., & Mager, S. M. (2014). Hydrogeochemical investigation into lowland catchment surface and groundwater interactions. Proceedings of the Water Symposium Joint Conference of the New Zealand Hydrological Society, New Zealand Freshwaters Society and IPENZ Rivers Group: Integration: 'The Final Frontier'. Retrieved from http://www.2014watersymposium.co.nz/abstracts/oral-abstracts/

Conference Contribution - Published proceedings: Abstract

Liddle, E., Mager, S., & Nel, E. (2014). Assessing the water quality, the challenges to provision, and the associated water development considerations in Ndola, Zambia. Proceedings of the African Studies Association of Australasia and the Pacific (AFSAAP) Annual Conference. (pp. 52). AFSAAP. [Abstract]

Conference Contribution - Published proceedings: Abstract

Mager, S. M., & Diack, E. E. (2014). Geomorphological and climatic influences on the hydrochemical facies of southern alps rivers. Proceedings of the Water Symposium Joint Conference of the New Zealand Hydrological Society, New Zealand Freshwaters Society and IPENZ Rivers Group: Integration: 'The Final Frontier'. Retrieved from http://www.2014watersymposium.co.nz/abstracts/oral-abstracts/

Conference Contribution - Published proceedings: Abstract

Mager, S., Leonard, G., Smith, I., & Pauling, A. (2014). Using bathymetric data to predict anchor ice formation sites in McMurdo Sound, Antarctica. Proceedings of the International Glaciological Society (IGS) International Symposium on Sea Ice in a Changing Environment. Retrieved from http://www.igsoc.org/symposia/2014/hobart/

Conference Contribution - Published proceedings: Abstract

Peren, S., Kingston, D., & Mager, S. (2014). Sustainable freshwater management under future climate scenarios and land use change in the Kakanui Catchment, Otago, New Zealand. In T. Konlechner & S. Connelly (Eds.), Proceedings of the Postgraduate Symposium. (pp. 49). Retrieved from http://www.geography.otago.ac.nz/resources

Conference Contribution - Published proceedings: Abstract

Pullen, J., Connelly, S., & Mager, S. (2014). Response strategies of the dairy farming community of the Grey Valley to drought, proactive or reactive? A qualitative investigation. In T. Konlechner & S. Connelly (Eds.), Proceedings of the Postgraduate Symposium. (pp. 50). Retrieved from http://www.geography.otago.ac.nz/resources

Conference Contribution - Published proceedings: Abstract

Severinsen, K. M., McDowell, R. W., & Mager, S. M. (2014). Controls on phosphorus concentrations under baseflow and stormflow events. Proceedings of the Water Symposium Joint Conference of the New Zealand Hydrological Society, New Zealand Freshwaters Society and IPENZ Rivers Group: Integration: 'The Final Frontier'. Retrieved from http://www.2014watersymposium.co.nz/abstracts/oral-abstracts/

Conference Contribution - Published proceedings: Abstract

Trevelyan, A. M., Mager, S. M., & Wilson, P. (2014). Fog deposition and contribution to water yield in Timber Creek, North Otago. Proceedings of the Water Symposium Joint Conference of the New Zealand Hydrological Society, New Zealand Freshwaters Society and IPENZ Rivers Group: Integration: 'The Final Frontier'. Retrieved from http://www.2014watersymposium.co.nz/abstracts/oral-abstracts/

Conference Contribution - Published proceedings: Abstract

Pauling, A., Leonard, G., Mager, S., & Smith, I. (2013). Modelling the spatial distribution and extent of anchor ice in Antarctica. Proceedings of the New Zealand Snow and Ice Research Group (SIRG) Annual Workshop. (pp. 38). Retrieved from http://www.sirg.org.nz/abstracts/SIRG2013_proceedings_v3.pdf

Conference Contribution - Published proceedings: Abstract

Mager, S. (2012). Anchor ice in polar oceans. Proceedings of the Polar Environment Research Theme (PERT) Workshop. Retrieved from http://polarresearch.otago.ac.nz/pert-workshop-2012/

Conference Contribution - Published proceedings: Abstract

Lovett, A. P., Fitzsimons, S. J., & Mager, S. M. (2011). An investigation into the origin, formation and deformation of mirabilite deposits, Hobbs Glacier Region, Antarctica. Proceedings of the New Zealand Snow and Ice Research Group (SIRG) Annual Workshop. (pp. 19). Retrieved from http://www.sirg.org.nz/abstracts/SIRG2011FoxGlacier_Programme.pdf

Conference Contribution - Published proceedings: Abstract

More publications...