PHYSICAL AND HYDRAULIC PROPERTIES OF WEATHERED GRANITIC ROCK IN SOUTHERN CALIFORNIA
作者:
J. JOHNSON-MAYNARD,
M. ANDERSON,
S. GREEN,
R. GRAHAM,
期刊:
Soil Science
(OVID Available online 1994)
卷期:
Volume 158,
issue 5
页码: 375-380
ISSN:0038-075X
年代: 1994
出版商: OVID
数据来源: OVID
摘要:
Weathered granitic rock is a material with properties intermediate between soil and hard rock. It retains structural features of the hard rock, including joint fractures, but also has porosity generated as a result of weathering of primary minerals, clay formation, and root invasion. This study evaluated the physical and hydraulic properties of moderately and highly weathered granitic rock (class 5 and 6, respectively, of the classification scheme of Clayton and Arnold (1972)) in the San Jacinto Mountains of southern California. Class 5 and 6 samples exhibited comparable bulk densities (approximately 1.94 g cm−3), porosities (27%), and particle size distributions. Saturated hydraulic conductivities were also similar for both weathering classes (approximately 5.5 cm h−1). Water retention data indicate that about 50% of the water held at saturation is drained at −100 cm head. Effective pore size distributions calculated from water retention data indicate that 25% of the total porosity was associated with pores >100 μm in diameter.
点击下载:
PDF
(408KB)
返 回