The extent (determined by the repellency indices RI and RIc) and persistence (determined by the water droppenetration time, WDPT) of soil water repellency (SWR) induced by pines were assessed in vastly different geographicregions. The actual SWR characteristics were estimated in situ in clay loam soil at Ciavolo, Italy (CiF), sandy soil atCulbin, United Kingdom (CuF), silty clay soil at Javea, Spain (JaF), and sandy soil at Sekule, Slovakia (SeF). For Culbinsoil, the potential SWR characteristics were also determined after oven-drying at 60°C (CuD). For two of the three pinespecies considered, strong (Pinus pinaster at CiF) and severe (Pinus sylvestris at CuD and SeF) SWR conditions wereobserved. Pinus halepensis trees induced slight SWR at JaF site. RI and RIc increased in the order: JaF < CuF < CiF <CuD < SeF, reflecting nearly the same order of WDPT increase. A lognormal distribution fitted well to histograms of RIcdata from CuF and JaF, whereas CiF, CuD and SeF had multimodal distributions. RI correlated closely with WDPT,which was used to develop a classification of RI that showed a robust statistical agreement with WDPT classification accordingto three different versions of Kappa coefficient.
|Numero di pagine||9|
|Rivista||Journal of Hydrology and Hydromechanics|
|Stato di pubblicazione||Published - 2018|
All Science Journal Classification (ASJC) codes
- Water Science and Technology
- Mechanical Engineering
- Fluid Flow and Transfer Processes