Browsing by Author "Lorentz, Simon A."
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Dynamics of groundwater flow and upwelling pressure heads at a wetland zone in a headwater catchment
Waswa, George W.; Lorentz, Simon A. (Springer Nature, 2019)The rate and direction of groundwater flow are a function of the gradient of the hydraulic head, whose components are gravity head and pressure head. This paper presents results and analyses of field observations of pressure ... -
Energy considerations in groundwater-ridging mechanism ofstreamflow generation
Waswa, George W; Lorentz, Simon A. (Hydrological Processes, 2015)Groundwater ridging is the rapid rise of a shallow water table during a rainfall event, in an environment where, in the pre-event period, the capillary fringe extends to the ground surface. Groundwater ridging is widely ... -
A model of landslide triggering bytransient pressure waves
Waswa, George; Lorentz, Simon A. (Copernicus GmbH, 2014)Previous studies indicate that most rainfall-triggered shallow landslides are initiated by a spike in rainfall intensity, which does not usually occur at the beginning of a critical storm, within which the slide is triggered, ... -
Transient pressure waves in the vadose zone and the rapid water table response
Waswa, George W.; Clulow, Alistair D.; Freese, Carl; A.L, Peter; Roux, Le; Lorentz, Simon A. (The Soil Science Society of America, Inc., 2013)The behaviour of a water table is important in understanding groundwater dynamics. In this 11 paper, results are presented of a disproportionate response of a water table in two distinct 12 transient pressure wave ... -
Transmission of pressure head through the zone of tension saturation in the Lisseeffect phenomenon
Waswa, George W; Lorentz, Simon A. (Taylor & Francis, 2016)The problem of transmission of pressure head through the zone of tension saturation in the Lisse effect(LE), i.e., the rapid response of groundwater level to pressurized pore air in the unsaturated zone, is investigated ...