Infiltration characteristics of a complex lateritic soil profile
作者:
J. K. Ruprecht,
N. J. Schofield,
期刊:
Hydrological Processes
(WILEY Available online 1993)
卷期:
Volume 7,
issue 1
页码: 87-97
ISSN:0885-6087
年代: 1993
DOI:10.1002/hyp.3360070109
出版商: John Wiley&Sons, Ltd
关键词: Infiltration;Ring infiltrometer;Well permeameter;Macro‐scale variability;Saturated hydraulic conductivity;Forest hydrology
数据来源: WILEY
摘要:
AbstractLarge infiltration ponds (10–15 m2) were used, in conjunction with a ring infiltrometer and a well permeameter, to determine the infiltration characteristics of a complex lateritic soil profile in the jarrah (Eucalyptus marginata) forest of Western Australia. Simultaneous measurements of soil water content and soil water potential allowed a description of the infiltration and redistribution in the soil profile. The infiltration ponds effectively measured the conductivity of a subsurface lateritic duricrust which was found to have a relatively high saturated hydraulic conductivity (Ks) of 2.7 m d−1, despite its apparently massive and extensive nature. Removal of the topsoil identified large (≈1 m2) infilled holes penetrating the duricrust over about 6% by area. Measurements indicated that these large ‘holes’ had a highKsvalue (≈ 10 m d−1), whereas the remaining duricrust had a lowerKsvalue (≈ 2m d−1). These results have implications for probable maximum flood design calculations and assessing the hydrological impact of extensive open
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