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vol. 5, nr. 1 (2005)
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Testing of saturated hydraulic conductivity coefficient using field and laboratory methods
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Małgorzata Iwanek
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Institute of Environmental Protection Engineering, Technical University of Lublin ul. Nadbystrzycka 40B, 20-618 Lublin |
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vol. 5 (2005), nr. 1,
pp. 39-47
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abstract:
Saturated hydraulic coefficient ks is an especially important parameter in mathematical modelling and simulation of soil-water processes. The above parameter is difficult to measure, being variable both in space and time and so requiring numerous samples and selecting a proper testing method. Field methods are the most credible, but they are time-consuming and usually need special expensive equipment. Application of a cylinder with a piezometer directly in the field eliminates errors connected with the change of natural conditions. At the same time, the method is simple and cheap. But applying it in low permeable soils can be limited by long time of measurement. In these cases, it is possible to replace testing in the field by the Wit laboratory method, but on the condition that at least 10 samples will be taken from one place and the measurement will be repeated several times. This was confirmed by statistical calculations.
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keywords:
saturated hydraulic conductivity coefficient, cylinder with piezometer, modified Wit apparatus, low permeable soils
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original in:
Polish
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