Grass cover influences hydrophysical parameters and heterogeneity of water flow in a sandy soil

0366295 - ÚH 2012 RIV CN eng J - Článek v odborném periodiku
Lichner, Ľ. - Eldridge, D. J. - Schacht, K. - Zhukova, N. - Holko, L. - Šír, Miloslav - Pecho, Jozef
Grass cover influences hydrophysical parameters and heterogeneity of water flow in a sandy soil.
Pedosphere. Roč. 21, č. 6 (2011), s. 719-729. ISSN 1002-0160. E-ISSN 2210-5107
Grant CEP: GA MŽP SP/1A6/151/07
Grant ostatní: Slovak Scientific Grant Agency(SK) VEGA 2/0042/11; Slovak Scientific Grant Agency(SK) VEGA 2/0073/11
Výzkumný záměr: CEZ:AV0Z20600510; CEZ:AV0Z30420517
Klíčová slova: dye tracing * grassland soil * hydrophobicity * infiltration * preferential flow
Kód oboru RIV: DA - Hydrologie a limnologie
Impakt faktor: 1.161, rok: 2011

Two sites were selected to quantify the influence of grass cover on hydrophysical parameters and heterogeneity of water flow in a sandy soil emerging during a heavy rain following a long hot, dry period. A control soil (pure sand) with limited impact of vegetation or organic matter was obtained by sampling at 50 cm depth beneath a glade area, and a grassland soil was covered in a 10 cm thick humic layer and colonised by grasses. The persistence of water repellency was measured using the water drop penetration time test, sorptivity and unsaturated hydraulic conductivity using a mini disk infiltrometer, and saturated hydraulic conductivity using a double-ring infiltrometer. Dye tracer experiments were used to assess the heterogeneity of water flow, and both the modified method for estimating effective cross section and an original method for assessing the degree of preferential flow were used to quantify this heterogeneity from the images of dyed soil profiles.
Trvalý link: http://hdl.handle.net/11104/0006630