ABSTRACT
Aggregates are often homogeneous internally, so even though classic flow theory should not be applied to the entire heterogeneous soil, it can be applied to the aggregates which will be wetted through surrounding macropores. Flow patterns through these macropores are a function of many factors Total macroporosity, however, is not a very relevant property in relation to water flow processes such as bypass flow since very few macropores, that contribute only a little to total macroporosity, dominate the transport of water and solutes. Soil samples were placed on a funnel connected to an outflow collector equipped with a pressure transducer. Measurement of the three-dimensional fractal dimension (D53) requires three-di-mensional image data, which requires vertical sampling, on horizontal cross sections, at an interval with adequate resolution. The amount of outflow cannot be explained by using only morphological data for the lower half of the core.
