Aldrin Rivas

Aldrin Rivas

Catchment Hydrologist

BSc (Civil Engineering), MEng (Water Engineering & Management)

Office +64 7 858 4840

Direct +64 7 858 4850

Email aldrin.rivas@lincolnagritech.co.nz

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Aldrin joined Lincoln Agritech in November 2016 as a Catchment Hydrologist. He has ten years of professional experience in the fields of water and environmental science, engineering, and management; and has worked in various sectors including academia and consultancy for private and government entities. 

Aldrin obtained his Bachelor’s degree in Civil Engineering from the Philippines and his Master’s degree in Water Engineering and Management from Thailand. He has also received training in Germany on environmental modelling that included modelling of water and solute transport in the unsaturated zone. Aldrin is close to submitting his PhD thesis on denitrification in the subsurface environment of the Manawatu River catchment from Massey University.

With a mixed background in engineering and science, Aldrin is involved in a variety of Lincoln Agritech projects including the Ground Water Mitigations project.

His interests include:
• Groundwater
• Denitrification in the vadose and saturated zones
• Vulnerability assessment of freshwater resources
• Integrated catchment development and management
• Water supply systems and management
• Environmental and hydrological modelling

Recent Projects

Latest Publications View All

Methanol dosing of a pilot-scale denitrifying bioreactor to enhance nitrate removal from tile drainage water

New Zealand Land Treatment Collective Annual Conference: Improving outcomes for land treatment

Moghaddam, R., Torres-Rojas, D., Barkle, G., Rivas, A., Hartland, A., & Schipper, L. May, 2021

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

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

High-frequency, in situ sampling of field woodchip bioreactors reveals sources of sampling error and hydraulic inefficiencies

Journal of Environmental Management

Maxwell, B. M., Birgand, F., Schipper, L.A., Barkle, G., Rivas, A., Helmers, M.J., Christianson, L.E. Jul, 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

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

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