Vadose Zone Research Group

Joseph Pollacco

Joseph Pollacco

Assistant Research Scientist
Biological and Agricultural Engineering

Ph. D.: University of Newcastle-Upon-Tyne, U.K., 2005
B.S.: University of East Anglia, U.K., 2000

Research Interests:
    I am an unsaturated zone hydrologist that uses physically based hydrological models (Richards-based SVAT model) that compute recharge, evapotranspiration, interception and soil moisture. My interest is to determine if the hydrological and vegetation parameters of the model can be retrieved from time series soil moisture and evapotranspiration measured from airborne and satellite remote sensing footprints. My research is by using the Linking Test to determine the feasibility of the inverse modelling and to reduce the number of required parameters enhancing the upscalling procedure. My interest is in developing/improving the Linking Test. The Linking Test investigates whether the inverse modelling is feasible by establishing whether the expected accuracy of the model can be attained. If the inverse modelling is unfeasible then the Linking Test offers methods of exploring the causes and ascertains if further data can alleviate the non-uniqueness problem. The Linking Test also determines the minimum number of effective parameters.


Publications:
Pollacco J.A.P., Saugier B., Angulo-Jaramillo R., Braud I., (2008), 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., (2008), 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.,, Modeling soil hydrological properties over a wide range of conditions, Ecological modelling Volume 219, Issues 3-4, Pages 300-316

Pollacco J.A.P., 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