As a Vadose zone hydrological scientist and modeller, my principal role in the Soils and Landscape team is to synergise pedology and hydrology. This has led to the development of S-map-Hydro, which provides 3D hydraulic parameters to a wide range of catchment hydrological models. S-map-Hydro is currently being tested and improved in collaboration with NIWA.
Deriving hydraulic parameters from laboratory work is expensive. Therefore, with international collaboration we derive hydraulic properties by using inexpensive/faster methods derived from the principles of physics. This has led to the development of an automatic infiltrometer, enabling our team to abstract more information from cost-effective particle size distribution.
The models we have developed are programmed using the open-source SoilWater-ToolBox software, which facilitates the comparison and combination of different methods of deriving hydraulic parameters, and computes water fluxes by using physically based hydrological models.
MAIN RESEARCH FOCUS
· Soil physics: development of physically based soil pedotransfer functions and cheap/fast methods to derive accurate hydraulic properties that are integrated into S-map or used for precision agriculture
· Hydrological modelling: formulating physically based soil–plant–water interactions models
· Scientific programming: writing open source models to derive soil properties and the hydrological response
· Calibrating models: developing algorithms to derive, from observations, unique fluxes and parameters that can be physically interpreted
· 2009 Advanced ArcGIS (Forestry), University New Brunswick, Canada
· 2001–2005 PhD (Civil Engineering & Geosciences), University of Newcastle-upon-Tyne, UK
· 1997–2002 BSc Hons (Geophys. Sciences/Env. Sciences), Univ. of East Anglia, Norwich, UK
Date Joined Manaaki Whenua – Landcare Research: 2014
· 2014– Hydrological Modeller, Manaaki Whenua – Landcare Research, New Zealand
· 2012–2013 Research Scientist, National Taiwan University, Taipei, Taiwan
· 2009–2011 Assistant Research Scientist, Texas A&M University, College Station, Texas, USA
· 2007–2008 Contract Engin. Researcher, École nationale des travaux publics de l'État, Lyon, France
· 2005–2007 Postdoctoral Researcher, University of New Brunswick, Canada
Pollacco J.A.P., Fernández-Gálvez J., Carrick S. (2019) Improved prediction of water retention curves for fine texture soils using an intergranular mixing particle size distribution model. Journal of Hydrology 584: 124597 DOI: 10.1016/j.jhydrol.2020.124597
Fernández-Gálvez, J., Pollacco, J.A.P., Lassabatere, L., Angulo-Jaramillo, R., Carrick, S., (2019) A general Beerkan Estimation of Soil Transfer parameters method predicting hydraulic parameters of any unimodal water retention and hydraulic conductivity curves: Application to the Kosugi soil hydraulic model without using particle size distribution data. Advances in Water Resources 129, 118–130. https://doi.org/10.1016/j.advwatres.2019.05.005
Pollacco, JAP, Webb, T., McNeill, S., Hu, W., Carrick, S., Hewitt, A., and Lilburne, L.: Saturated hydraulic conductivity model computed from bimodal water retention curves for a range of New Zealand soils, Hydrol. Earth Syst. Sci., 21, 2725-2737, https://doi.org/10.5194/hess-21-2725-2017, 2017
Pollacco J.A.P., Mohanty B.P. Efstratiadis A., (2013a) “Weighted Objective Function Selector Algorithm for Parameter Estimation of SVAT Models with Remote Sensing Data.” Water Resources Research, 49, doi: 10.1002/wrcr.20554.
Pollacco J.A.P., Nasta P., Ugdale J.M., Angulo-Jaramillo R., Lassabatere L., Mohanty B.P., Romano N., (2013b) “Reduction of feasible parameter space of the inverted soil hydraulic parameters sets for Kosugi model.” Soil science, Volume 178, Issue 6.
Pollacco, J.A.P., Mohanty B.P., (2012) “Uncertainties of Water Fluxes in Soil–Vegetation–Atmosphere Transfer Models: Inverting Surface Soil Moisture and Evapotranspiration Retrieved from Remote Sensing.” Vadose Zone Journal, Volume 11, Issue 3, 11 doi:10.2136/vzj2011.0167.
Pollacco J.A.P., Angulo-Jaramillo R., (2009) “A Linking Test that investigates the feasibility of inverse modelling: application to a simple rainfall interception model for Mt. Gambier, southeast South Australia.” Hydrological Processes, Volume 23, Issue 14, Pages: 2023-2032
Pollacco J.A.P. (2008a) “A generally applicable pedotransfer function that estimates field capacity and permanent wilting point.” Canadian Journal of soil science, Volume 88, Issue 5, Pages 761–774.
Pollacco J.A.P., Saugier B., Angulo-Jaramillo R., Braud I., (2008b) “A Linking Test that establishes if groundwater recharge can be determined by optimising vegetation parameters against soil moisture.” Annals of Forest Science, Volume 65, Issue 7, 702 doi: 10.1051/forest: 2008046.
Pollacco J.A.P., Ugdale J.M., Saugier B., Angulo-Jaramillo R., Braud I., (2008c) “A Linking Test to reduce the number of hydraulic parameters necessary to simulate groundwater recharge in unsaturated soils.” Advances in Water Resources, Volume 31, Issue 2, Pages 355-369.
Balland V., Pollacco J.A.P., Arp P., (2008d) “Modelling soil hydraulic properties for a wide range of soil conditions.” Ecological modelling, Volume 219, Issues 3-4, Pages 300-316.
PEER REVIEWED REPORT
Pollacco JAP, Poggio M (2018) Report on the Precision Agriculture workshop in Montpellier, France, 22–26 October 2018, & the Dumont d’Urville French partnership 2018/2019
Griffiths J, Rajanayaka C, Zammit Pollacco JAP (2018) Review of Hydrological Models and Pedotransfer Functions, NIWA Client report No: 2018140CH
Pollacco JAP and Shirley V (2017) Deriving Green–Ampt, Clapp and Hornberger, Brooks and Corey, and saturated hydraulic conductivity parameters from S-map 3D data, Landcare Research Contract Report LC3046, New-Zealand
Pollacco JAP (2017) An unsaturated hydraulic conductivity pedotransfer function computed from bimodal soil-water characteristic curves, Landcare Research Contract Report LC2726, New-Zealand
Pollacco J.A.P., (2017) Comparison of a single layer bucket model with a layered physically based model Landcare Research Contract Report, LC2405, New-Zealand
Pollacco J.A.P., (2016) Literature review of hydrological processes of soils with rock fragments, Landcare Research Contract Report LC27688, New-Zealand
Pollacco J.A.P., (2016) Preliminary literature review of different hydrological models for preferential flow, Landcare Research Contract Report LC 2651, New-Zealand
Pollacco JAP (2016) Assessing soil vulnerability to ponding using the physically based HyWat model. Landcare Research Contract Report LC2411 for Landcare Research.
Pollacco J.A.P., Hedley C., Mcneill S. (2016) Linking field measurements of soil moisture to S-map information Landcare Research Contract Report LC 2652, New-Zealand
Manderson A., Lilburne L., Hewitt A., Pollacco J.A.P., Carrick S. (2016) Recommendations and interim soils data to support the development of a national freshwater reporting model, Landcare Research Contract Report LC2403, New-Zealand
Pollacco J.A.P., McNeill S. (2016) Selecting a modelling approach: A comparison of physically based and bucket one-dimensional models Landcare Research Contract Report LC2666, New-Zealand
Pollacco J.A.P., (2015) Integrating Soil Data into New Zealand Hydrological Models – results of a user survey, Landcare Research Contract Report LC2403, New-Zealand
Pollacco J.A.P., Carolyn H. (2015) Quantifying Improvements made by Variable Rate, Landcare Research Contract Report LC2408, New-Zealand
Pollacco J.A.P., Linda R., Lilburne, Trevor H. Webb, David M. Wheeler (2014) Preliminary assessment and review of soil parameters in OVERSEER® 6, Landcare Research Contract Report: LC2002, New-Zealand
Pollacco J.A.P., Angulo-Jaramillo R., Delolme C., Goutaland D., Perrodin Y., Winiarski T., Barraud S., Lipeme-Kouyi G., Malard F., Mermillod-Blondin F., (2008e) Elaboration of a global system to evaluate the transfer of contaminants in stormwater infiltration basin constructed in glacio fluvial deposits in urban areas (French) financed by the Zone Atelier of the Basin of the Rhone for the water Agency of the Rhone-Mediterranean and Corsica, pp 85, FRANCE
PEER REVIEWED CONFERENCES
Pollacco J.A.P. (2003a) Predicting the impact of afforestation or deforestation on recharge using only time series soil moisture and hydrometeorological data., in MODSIM Proceedings, 14-17 July. pp. 578-583, AUSTRALIA
Pollacco J.A.P. (2003b) Constructing and optimising a parsimonious groundwater recharge model using neutron probe data in. MODSIM Proceeding, 14-17 July. pp. 195-200, AUSTRALIA
Parkin G., Pollacco J.A.P., Calder I.R., Reid, I., Nisbet T., Green J., (2002) Inverse modelling of unsaturated zone processes for recharge prediction under different land uses in 3rd Int. Conference on Water Resources and Environment Research (ICWRER) Proceedings, Dresden, pp. 1-10, GERMANY
“Rainfall runoff models.” (24th April 2013), Dept. of Bioenvironmental systems Eng. , National Taiwan University, TAIWAN invited by Prof. Fi-John Chang
“Improving the modelling of the hydrological processes of conceptual rainfall models without increasing the number of parameters and calibrating the model by using a multi-objective calibration scheme which reduces non-unique solutions.” (20th February 2013), Department of Civil Engineering, National Taiwan University, TAIWAN invited by Prof. Gene J-Y You
“Uncertainties of Water Fluxes in Soil–Vegetation–Atmosphere Transfer Models: Inverting Surface Soil Moisture and Evapotranspiration Retrieved from Remote Sensing.” (9th November 2012) Dept. of Geography, National Taiwan Normal University, TAIWAN invited by Prof. Shyue-cherng Liaw
“Towards developing algorithms to reduce uncertainties of parameter estimation of hydrological models.” (3rd Nov. 2011) Graduate Institute of Applied Geology, National Central University, TAIWAN invited by Prof. G. T. Yeh
Deriving soil hydraulic parameters from particle size distribution and infiltration tests (Oct 2019), MWLR, NZ
“Proximal and remote sensing approaches for quantitative soil analysis and precision agriculture”, Precision Agriculture Mission – Montpellier, (2019) France invited by Precision Agriculture funds from the French Embassy
“Developing Parsimonious Watershed Models Suitable To Take Advantage Of Data Retrieved At Different Scales” (26th September 2014), NIWA, New-Zealand
“Can we compute the water fluxes of SVAT models by calibrating the hydraulic parameters with soil moisture and evapotranspiration retrieved from remote sensing?” (27th February 2014), Centre D’Etudes Spatiales de la BIOsphere (CESBIO), FRANCE invited by Dr Simon Gascoin
“Developing parsimonious watershed models suitable to take advantage of data retrieved at different scales.” (8th January 2014) Centre de Géosciences - Systèmes hydrologiques et Réservoirs (École des Mines), Paris, FRANCE invited by Director Patrick Goblet and Dr Nicolas Flipo.
“Developing parsimonious watershed models suitable to take advantage of data retrieved at different scales.” (17th December 2013) Laboratoire d' Hydrologie et de la Geochimie de la Surface (LHyGeS), Strasbourg, FRANCE invited by Director François Chabaux.
“Reducing the uncertainties of the inverted water fluxes of hydrological models by calibrating the hydraulic parameters from soil moisture and evapotranspiration retrieved from remote sensing.” (4th June 2012) Institut national de Recherche en Science et Technologies pour l’Environnement et l’Agriculture (IRSTEA), FRANCE invited by Prof. Isabelle Braud.
“Reducing the uncertainties of the inverted water fluxes of hydrological models by calibrating the hydraulic parameters from soil moisture and evapotranspiration retrieved from remote sensing.” (31st May 2012) Laboratoire d’étude des Transferts en Hydrologie et Environnement (LTHE), FRANCE invited by Director Thierry Lebel.
“Towards developing algorithms to reduce uncertainties of inverted water fluxes of hydrological models, (31st Feb. 2012) Fenner School of Environment & Society, Australian National University, AUSTRALIA invited by Prof. Tony Jakeman.
“Reducing the non-uniqueness of the hydraulic parameters.” (15th Nov. 2010) Earth and Environmental Sciences, Division of Los Alamos National Laboratory, USA invited by Prof. Phil Stauffer.
“Elaboration of an integrated modelling project of a stormwater infiltration basin.” (20th Jan. 2008) Ecole Nationale Travaux Publics de l’Etat, Laboratoire Science Environnent, FRANCE invited by Prof. Yves Perrodin.
“Inverse modelling philosophy and introduction to the linking test (20th Nov. 2006), Faculty of hydraulic engineering, National Taiwanese University, TAIWAN invited by Prof. Tim Hau Lee.
“Unsaturated Hydraulic Parameters Determined By Inverse Modelling (19th Nov. 2006), Research centre for environmental change, Institute of Information Science Academia SINICA, TAIWAN invited by Prof. Shuh Ji Kao.
“Can ground water recharge be determined in the unsaturated zone under forests by using only soil moisture and metrological data? (15th Nov. 2006) Forestry Research Institute, TAIWAN invited by the Director-General, Prof. Hen-biau King.
“The role of physical geographers in the mitigation of environmental hazards.” (11th Nov 2006) Department of Geography Normal Taiwanese University, TAIWAN invited by Prof. Hsueh-Mei Lin.
“Inverse methods to determine parameters in a physically based model of soil water balance.” (24th April 2005) Depart. of Écologie, Systématique et Évolution University Paris XI, FRANCE invited by Prof. Bernard Saugier.
J.A.P. Pollacco, J. Fernández-Gálvez, S. Carrick (2019), Predicting soil water retention curves of fine texture soils from traditional particle size distribution data by using Soil-Water-Toolbox, Zealand Hydrological Society, 3-6 December 2019, Rotorua, NEW-ZEALAND
Roudier P, Hedley, C, Ekanayake J, Pollacco J. (2016) Real-time soil moisture monitoring irrigation decision support systems Presentation to the Irrigation New Zealand conference, 5-7 April 2016, Oamaru
Pollacco J.A.P, Trevor W. Developing methods to estimate saturated and unsaturated hydraulic conductivity. From new zealand soils, water symposium, integration: the final frontier, pp.216, New Zealand Hydrological Society, 24-28 November 2014, Blenheim, NEW-ZEALAND
“Generalized framework to reduce the non-uniqueness of the inverted parameters.” ORAL, (8-12 August 2011), AOGS Taipei, TAIWAN.
“On water fluxes uncertainties of SVAT models: inverting surface soil moisture and evapotranspiration retrieved from remote sensing.” (8-12 August 2011), ORAL, AOGS Taipei, TAIWAN
“Uncertainty related to the estimation of saturated hydraulic conductivity from parameters of soil water retention function.” (13-18 April 2011), Poster, EGU Vienna, AUSTRIA
“Multiple objective function simulator algorithm for hydraulic parameters estimation by surface soil moisture and evapotranspiration.” (13-17 Dec 2010), ORAL, AGU Fall meeting San Francisco, USA.
“Can hydraulic parameters of a physically based model be identified by time series soil moisture data?” (14-18 Dec 2009), ORAL, AGU Fall meeting San Francisco, USA.
“Estimation of the water fluxes, sediments and heavy metals in a retention-infiltration basin.” (13-18 April 2008), Poster, EGU Vienna, AUSTRIA.
“HYDRUS-3D flow model to investigate urban vadose zone hydrology.” (13-18 April 2008), Poster, EGU Vienna, AUSTRIA.
“A linking test that explores the non-uniqueness of soil and vegetation parameters of a unsaturated flow model.” (10–14 Dec 2007), ORAL, AGU Fall meeting San Francisco, USA.
“A Linking Test to reduce the number of hydraulic parameters necessary to simulate groundwater recharge in unsaturated soils.” (3-6 Nov. 2006), ORAL, 10th International Geographical Conference in Taiwan, National Taiwan Normal University, TAIWAN
Minimum set of hydraulic parameters required to determine percolation in non-saturated soils.” (14-17 May 2006), ORAL, Annual Meeting of the Canadian Geophysical Union, Banff, CANADA.
“Predicting field capacity and permanent wilting point for a wide range of soil conditions.” (14-17 May 2006), ORAL, Annual Meeting of the Canadian Geophysical Union, Banff, CANADA.
“Modeling Groundwater Recharge In The Unsaturated Zone Under Forests Using Soil Moisture And Meteorological Data.” (7-11 June 2004), Oral, Conference on Applications of Statistics, Information Systems and Computers in Natural Resources Monitoring and Management IUFRO 4.11, ORAL, National Taiwan University, TAIWAN
Newcastle Upon Tyne
PhD Hydrological Modelling