DEEP PERCOLATION DURING PROLONGED PONDING OF A SWELLING SOIL, AND THE EFFECT OF GYPSUM TREATMENT

被引：6

作者：

KOWALIK, P ^{[1
]}

LOVEDAY, J ^{[1
]}

MCINTYRE, DS ^{[1
]}

WATSON, CL ^{[1
]}

机构：

[1] CSIRO, DIV SOILS, CANBERRA 2601, ACT, AUSTRALIA

来源：

AGRICULTURAL WATER MANAGEMENT | 1979年 / 2卷 / 02期

关键词：

D O I：

10.1016/0378-3774(79)90027-1

中图分类号：

S3 [农学（农艺学）];

学科分类号：

0901 ;

摘要：

A sodic clay soil (a Vertisol) was instrumented from a 5 m deep pit to avoid the problems of preferential cracking around surface installations. Infiltration rates and changes in water content and vertical swelling at a number of depths in the soil profile were measured during prolonged ponding (139 and 160 days on separate plots). Essentially no deep percolation in one plot contrasted with a substantial amount (6.6 mm day-1) in the second, gypsum-treated plot, with obvious consequences for changes in ground-water level. A method of calculating deep percolation is presented which takes into account the effects of swelling. © 1979.

引用

页码：131 / 147

页数：17

共 16 条

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