Spatial and temporal variability of physical properties of Aquands under different land uses in southern Chile

• DOI: 10.1111/sum.12286
• Publication Date: 2016-09-06T10:13:15Z
• Authors: José Dörner; Dorota Dec; Oscar Thiers; Leandro Paulino; Felipe Zúñiga; Susana Valle; Oscar Martínez; Rainer Horn
• Keywords: Waterlogging (archaeology)

Abstract The aquands found in southern Chile are derived from volcanic ash and contain high levels of organic matter. Due to the presence an impermeable stratum, they have shallow soil profiles, which induce waterlogging for several months each year. These fragile soils, locally known as ‘Ñadi’, cover area 475 000 hectares undergone intensive land use changes, affected physical properties. still not well understood but relevant design efficient drainage systems. aim this research was analyse impact change Ñadi soils on spatial temporal variability their For secondary native forest ( sNF ) naturalized grassland NG ), effective depth measured at defined points. Time‐ space‐dependent changes water‐table penetration resistance were recorded. Volumetric water content temperature with sensors installed three depths retention curve air permeability these also determined. over time induced a reduction depth. Soils under showed smaller storage capacity, capacity compared , during winter greater mechanical strength profile temperatures summer. Therefore, functions across field.