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Browsing by Title
Now showing items 10872-10891 of 42285
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(2003)This paper describes a new erosion model to predict the location and volume of ephemeral gullies within the main runoff collector network of agricultural catchments. This model, using an expert-based approach, combines ...
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(2003)The Volga system is sensitive to allogenic control due to its low on- and offshore gradient (∼5 cm/km). In sequence stratigraphy, little attention has been paid to the effects of sea-level change in these ramp-margin ...
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MODELLING ISOTOPE FRACTIONATION DURING PRIMARY CRACKING OF NATURAL GAS: A REACTION KINETIC APPROACH (1998)A numerical model has been developed to compute stable carbon isotope variations in natural gas (methane) by calculating 13CH4 and 12CH4 generation as a set of parallel first-order reactions of primary cracking. The goal ...
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(2001)This contribution presents the results of a numerical study of karst denudation on limestone plateaux. The landscape evolution model used incorporates not only long-range fluvial and short-range hill-slope processes, but ...
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(2004)Magma properties are fundamental to explain the volcanic eruption style as well as the generation and propagation of seismic waves. This study focusses on magma properties and rheology and their impact on low-frequency ...
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(2003)The environmental geochemistry of molybdenum and tungsten is not well known. To enable predictions of Mo and W concentrations in the presence of ferrihydrite (hydrous ferric oxide), batch equilibrations were made with ...
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(2004)General relations are obtained for the determination of radial and tangential components of displacements and gravitational potential variations at the Earth's surface due to tidal forces for a model with a horizontally ...
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(2003)The wavelet approach to numerical simulation of elastic wave propagation is applied to models with localized heterogeneity, with significant contrasts with their surroundings. We consider zones with both lowered wave speed ...
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(2006)Temporal variability and spatial heterogeneity of surface runoff generation triggers the dynamics of source areas of sediment and sediment-associated nutrient transport. Reliable modelling of hydrological special situations ...
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(1999)It is often argued that the δ18O value of oceanic water was maintained close to 0%% for hundreds of millions of years, as a consequence of oxygen isotope exchange between oceanic crust and seawater. However, for several ...
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(2001)Grassed areas, such as grass filter strips (GFS) and grassed swales, have been used extensively for the protection of surface water against erosion and polluted runoffs. A mathematical model of sediment transport in runoff ...
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(PANGAEA, 2017-09-11)Most northern peatlands developed during the Holocene, sequestering large amounts of carbon in terrestrial ecosystems. However, recent syntheses have highlighted the gaps in our understanding of peatland carbon accumulation. ...
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(2006)Magnesian metamorphic rocks with metapelitic mineral assemblage and composition are of great interest in metamorphic petrology for their ability to constrain P–T conditions in terranes where metamorphism is not easily ...
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(2001)We present a method for modelling seismic wave propagation in a whole-earth model by solving the elastodynamic equations in 2-D cylindrical coordinates (r, θ) using the Fourier pseudospectral method (PSM). In solving the ...
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(2002)Seepage from a stream, which partially penetrates an unconfined alluvial aquifer, is studied for the case when the water table falls below the streambed level. Inadequacies are identified in current modelling approaches ...
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(2004)Field estimation of soil water flux has a direct application for water resource management. Standard methods are often difficult to apply because of the heterogeneity of the subsurface. In the present study, we show that ...
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(2003)This paper presents the first attempt to provide a two-dimensional numerical model simulating processes and related deposits of individual subaqueous bipartite gravity flows. A new code for dense flows has been implemented ...
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(2002)Atomistic simulations have been carried out to study the adsorption of the hydrated uranyl ion on a variety of faces of goethite (α-FeOOH). The relative stabilities of these faces have been assessed by calculation of the ...
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(2002)The rheological behaviour of many rock-types will depend on how mixtures of different minerals and rock clasts behave together. This paper develops two-dimensional modelling of the bulk viscosity of two-phase viscous ...
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(1998)The rates of passive degassing from volcanoes are investigated by modelling the convective overturn of dense degassed and less dense gas-rich magmas in a vertical conduit linking a shallow degassing zone with a deep magma ...
Now showing items 10872-10891 of 42285