Woodchip bioreactors – design considerations
New Zealand Land Treatment Collective Annual Conference: Improving outcomes for land treatment
Barkle, G., Rivas, A., Moorhead, B., Stenger, R., Schipper, L., & Clague, J. May, 2021
The importance of the hydrological pathways in exporting nitrogen from grazed artificially drained land
Journal of Hydrology, 597: 126218
Barkle, G., Stenger, R., Moorhead, B., Clague, J. Mar, 2021
DOI: 10.1016/j.jhydrol.2021.126218
Application of a Bayesian Chemistry-Assisted Hydrograph Separation (Bach) Model to 48 Diverse Catchments In Waikato, Hawke's Bay And Taranaki.
Weathering the Storm Conference Handbook, Oral abstracts.
Park, J, Stenger, R, Woodward, SJR, Rivas, A, Clague, J Dec, 2020
A novel method for calculating nitrate removal rates in woodchip bioreactors using data from high-frequency monitoring.
Weathering the Storm Conference Handbook, Oral abstracts.
Rivas, A., Barkle, G., Maxwell, B., Moorhead, B., Stenger, R., Park, J., Schipper, L., and Clague, J. Dec, 2020
Synoptic flow gaugings/stream sampling to unravel heterogeneity within catchments
NZHS, NZ Rivers Group and NZFSS Joint Conference
Stenger. R, Rivas.A, Brakle.G, Clague.J, Moorhead.B, Park.J, Morgenstern.U Dec, 2020
Synoptic gaugings/samplings to elucidate water and nutrient fluxes within catchments.
NZ-China Water Research Centre workshop
Stenger, R, Rivas, A, Barkle, G, Owers, J, Clague, J, Moorhead, B, Park, J, Morgenstern, U. Nov, 2020
Extension of Bayesian chemistry-assisted hydrograph separation to reveal water quality trends (BACH2)
Stochastic Environmental Research and Risk Assessment
Woodward, S.J.R., Stenger, R. Oct, 2020
Likely controls on dissolved reactive phosphorus concentrations in baseflow of an agricultural stream Journal of Soils and Sediments
Journal of Soils and Sediments
McDowell, R.W., Depree, C., Stenger, R. Apr, 2020
Achieving unbiased predictions of national-scale groundwater redox conditions via data oversampling and statistical learning. Science of the Total Environment, Vol. 705, 135877 14pp.
Science of the Total Environment
Wilson, S. R., Close, M. E., Abraham, P., Sarris, T. S. Banasiak, L., Stenger, R., Hadfield, J. Mar, 2020
Nitrate removal and secondary effects of a woodchip bioreactor for the treatment of subsurface drainage with dynamic flows under pastoral agriculture. Ecological Engineering 148 (2020) 105786. doi.org/10.1016/j.ecoleng.2020.105786
Ecological Engineering
Rivas, A., Barkle, G., Stenger, R., Moorhead, B. Clague, J. Mar, 2020
Pilot-scale woodchip bioreactor for removing nitrate from artificial drainage in a Waikato dairy farm
A Workshop on Innovations for Attenuating Nutrient Loss from Farms
A. Rivas, G. Barkle, B. Moorhead, J. Clague, & R. Stenger Feb, 2020
Determining spatial variability of nitrate removal in a woodchip bioreactor through high frequency monitoring at multiple locations
FLRC 2020
Aldrin Rivas, Greg Barkle, Bryan Maxwell, Brian Moorhead, Roland Stenger, Louis Schipper, François Birgand, Juliet Clague Feb, 2020
Development of a national-scale framework to characterise transfers of N, P and Escherichia coli from land to water
NZ Journal of Agricultural Research
Srinivasan, M. S., Muirhead, R. W., Singh, S, K., Monaghan, R. M., Stenger, R., Close, M. E., Manderson, A., Drewry, J. J., Smith, L. C., Selbie, D., Hodson, R. Jan, 2020
Achieving unbiased predictions of national-scale groundwater redox conditions via data oversampling and statistical learning
Science of the Total Environment
Wilson, S.R., Close, M.E., Abraham, P., Sarris, T.s., Banasiak, L., Stenger, R., Hadfield, J. Nov, 2019
DOI: 10.1016/j.scitotenv.2019.135877
The influence of unsaturated zone drainage status on denitrification and the redox succession in shallow groundwater. Science of the Total Environment, Vol. 660, 1232-1244.
Science of the Total Environment
Clague, J.C., Stenger, R., Morgenstern, U. Nov, 2019
The influence of unsaturated zone drainage status on denitrification and the redox succession in shallow groundwater
Science of the Total Environment, Vol. 660, 1232-1244
Clague, J.C., Stenger, R., Morgenstern, U. Jan, 2019
AbstractSince nitrate is a major agricultural freshwater contaminant, denitrification is the environmentally most important step in the ecological succession of redox processes that can occur in groundwater. Understanding wh... Read More
Determining the vertical variation of hydraulic properties in the shallow groundwater zone
NZ Hydrological Society & Meteorological Society of NZ Joint Conference, Christchurch, New Zealand
Rivas, A., Barkle, G., Moorhead, B., Stenger, R. Dec, 2018
Estimating catchment-scale flowpath contributions based on widely available geospatial data
NZ Hydrological Society & Meteorological Society of NZ Joint Conference, Christchurch, New Zealand
Rivas, A., Stenger, R. Dec, 2018
Effect of varying flowpath contributions on longitudinal baseflow stream chemistry patterns
NZ Hydrological Society & Meteorological Society of NZ Joint Conference, Christchurch, New Zealand
Clague, J., Stenger, R., Morgenstern, U. Dec, 2018
Can we defensibly estimate catchment-scale flowpath contributions based on widely available geospatial data?
Soils 2018 Conference: Diverse Soils – Productive Landscapes, Napier, New Zealand
Rivas, A., Stenger, R. Dec, 2018
Reducing nitrate discharges from artificial drainage with woodchip bioreactors
NZ Hydrological Society & Meteorological Society of NZ Joint Conference, Christchurch, New Zealand
Rivas, A., Barkle, G., Moorhead, B., Clague, J., Stenger, R. Dec, 2018
Indirect Methods to Elucidate Water Flows and Contaminant Transfer Pathways through Meso-scale Catchments – a Review
Stochastic Environmental Research and Risk Assessment
Singh, S.K., Stenger, R. Oct, 2018
Bayesian chemistry-assisted hydrograph separation (BACH) and nutrient load partitioning from monthly stream phosphorus and nitrogen concentrations
Stochastic Environmental Research and Risk Assessment
Woodward, S. J. R., Stenger, R. Sep, 2018
The influence of a flood event on the potential sediment control of baseflow phosphorus concentrations in an intensive agricultural catchment
Journal of Soils and Sediments
McDowell, R. W., Simpson, Z. P., Stenger, R., Depree, C. Jun, 2018
Vertical stratification of redox conditions, denitrification and recharge in shallow groundwater on a volcanic hillslope containing relict organic matter
Science of the Total Environment, Vol. 639, 1205-1219
Stenger, R., Clague, J. C., Morgenstern, U., Clough, T. J. May, 2018
Understanding the linkage between hydrological and chemical signatures at catchment outlets and dominant contaminant transfer pathways
Integrating Multiple Aquatic Values (IMAV 2017), Hamilton, New Zealand
Stenger, R. Nov, 2017
Predicting nitrate discharge dynamics in mesoscale catchments using the lumped StreamGEM model and Bayesian parameter inference
Journal of Hydrology, Vol. 552, 684-703
Woodward, S. J. R., Wöhling, T., Rode, M., Stenger, R. Sep, 2017
Agriculture and water quality, developments and challenges in science, management and policy 2013-2017: Examples from a few countries
International Interdisciplinary Conference on Land Use and Water Quality (LuWQ2017)
Fraters, D., Kovar, K., Kronvang, B., Stenger, R., Bolster C. Jun, 2017
Using flow regimes to determine how well catchments buffer water quality contaminants
International Interdisciplinary Conference on Land Use and Water Quality (LuWQ2017)
McDowell, R. W., Snelder, T., Stenger, R., Rissmann, C., Larned, S. Jun, 2017
Nitrate assimilation capacity of shallow groundwater underlying dairy farms in the Reporoa Basin, NZ
International Interdisciplinary Conference on Land Use and Water Quality (LuWQ2017)
Stenger, R., Clague, J., Moorhead, B., McKelvey, T., Morgenstern, U. Jun, 2017
Nitrogen phosphorus exports from artificially drained dairy pastures in the Hauraki Plains, NZ
International Interdisciplinary Conference on Land Use and Water Quality (LuWQ2017), The Hague, The Netherlands
Stenger, R., Barkle, G., Moorhead, B., McKelvey, T. May, 2017
AbstractThis work forms part of the MBIE-funded Transfer Pathways Programme, which targets quantification of the pathway-specific transfers of nitrogen (N) and phosphorus (P) from the land to receiving waters, taking lag time... Read More
Uncertainty in the modelling of spatial and temporal patterns of shallow groundwater flow paths: the role of geological and hydrological site information
Journal of Hydrology, Vol. 59(2), 680-694
Woodward, S. J. R., Wöhling, T., Stenger, R. Mar, 2016
AbstractUnderstanding the hydrological and hydrogeochemical responses of hillslopes and other small scale groundwater systems requires mapping the velocity and direction of groundwater flow relative to the controlling subsurf... Read More
Flow Stratification of River Water Quality Data to Elucidate Nutrient Transfer Pathways in Mesoscale Catchments
Transactions of The ASABE, Vol. 59(2),
Woodward, S. J. R., Stenger, R., Hill, R. B. Mar, 2016
AbstractWhile analysis of river water quality time series data alone allows observation of means, variances, trends, and seasonality, it cannot elucidate the catchment mechanisms responsible for these observations. Incorporat... Read More
Genome-scale investigation of phenotypically distinct but nearly clonal Trichoderma strains
Transactions of The ASABE, Vol. 59(2),
Lange, C., Weld, R. J., Cox, M. P., Bradshaw, R. E., McLean, K. L., Stewart, A., Steyaert, J. M. Mar, 2016
AbstractBiological control agents (BCA) are beneficial organisms that are applied to protect plants from pests. Many fungi of the genus Trichoderma are successful BCAs but the underlying mechanisms are not yet fully understoo... Read More
Uncertainty in the modelling of spatial and temporal patterns of shallow groundwater flow paths: The role of geological and hydrological site information
Hydrological Processes, Vol. 534, 680-694
Woodward, S. J. R., Wöhling, T., Stenger, R. Mar, 2016
AbstractUnderstanding the hydrological and hydrogeochemical responses of hillslopes and other small scale groundwater systems requires mapping the velocity and direction of groundwater flow relative to the controlling subsurf... Read More
Denitrification in the shallow groundwater system of a lowland catchment: A laboratory study
CATENA, Vol. 131, 109-118
Clague J. C., Stenger, R., Clough, T. J. Aug, 2015
AbstractEvidence for the occurrence of denitrification in shallow groundwater systems in New Zealand (NZ) is poorly documented; however, an observational study of the Toenepi dairying catchment in the Waikato region of NZ rev... Read More
Evaluation of the stable isotope signatures of nitrate to detect denitrification in a shallow groundwater system in New Zealand
Agriculture, Ecosystems and Environment, Vol 202, 188-197
Clague J .C., Stenger, R., Clough T. J. Apr, 2015
AbstractDenitrification in the groundwater systems of agricultural catchments can provide a substantial ‘ecosystem service’ by attenuating leached nitrate (NO3−) before it reaches surface water bodies. Samples along a g... Read More
Flow Stratification of River Water Quality Data to Elucidate Nutrient Transfer Pathways in Mesoscale Catchments
Transactions of The ASABE, Vol. 59(2), 545-551
Woodward, S. J. R., Stenger, R., Hill, R. B. Jan, 2015
AbstractWhile analysis of river water quality time series data alone allows observation of means, variances, trends, and seasonality, it cannot elucidate the catchment mechanisms responsible for these observations. Incorporat... Read More
Variability of unsaturated Bromide fluxes as measured through a layered volcanic vadose zone in New Zealand
Hydrological Processes, Vol. 28 (5), 6080–6097
Barkle, G. F., Wöhling, T., Stenger, R. Jan, 2014
AbstractThe measured drainage fluxes through a layered volcanic vadose zone exhibited high spatial variability as a consequence of heterogeneous flow conditions. The drainage flux variability was quantified using automated eq... Read More
Quantifying groundwater contribution to stream flow generation in a steep headwater catchment
Journal of Hydrology, Vol. 53 (1)
Barkle, G. F., Stenger, R., Burgess, C., Wall, A. Jan, 2014
Silica (SiO2) concentration of water increases with contact time between the water and subsurface silica-bearing minerals. Consequently, SiO2 can be used as a tracer to investigate the water sources (reservoirs) and associate... Read More
A framework for understanding the linkages between land and water quality impacts.
Currie, L.D., Hedley, M.J. (eds) Science and policy: nutrient management challenges for the next generation.
Tanner, C. C., Muirhead, R., Burger, D., Carrick, S., Close, M., Monaghan, R., Singh, S., Srinivasan, M., Stenger, R., Tipa, G. ,
Using monthly stream water quality data to quantify nitrate transfer pathways in three Waikato catchments.
Currie, L.D., Hedley, M.J. (eds) Science and policy: nutrient management challenges for the next generation.
Woodward, S. J. R., Stenger, R. ,
AbstractMonthly water quality sampling at the catchment outlet is carried out at many sites across New Zealand for state of the environment monitoring. This data is used for trend analysis, but little else. We have been explo... Read More