THE USE OF NATURAL TRACERS AS INDICATORS OF SOIL-WATER MOVEMENT IN A TEMPERATE SEMI-ARID REGION
THE USE OF NATURAL TRACERS AS INDICATORS OF SOIL-WATER MOVEMENT IN A TEMPERATE SEMI-ARID REGION
复制标题
DOI：
10.1016/0022-1694(83)90019-7
复制
发表时间：
1983-01-01
影响因子：
6.4
通讯作者：
HUGHES, MW
中科院分区：
文献类型：
--
作者：
ALLISON, GB;HUGHES, MW
在澳大利亚南部的半干旱地区，从桉树灌丛到种植小麦的土地利用变化引起了土壤水分运动机制和深层排水量的显著变化。土壤水的氯化物浓度用于显示平均年深层排水量从< 0.1增加到约。3毫米yr-1后清除原生植被。原生植被下土壤水中环境氚的浓度与假设一致，即一些相对较新的水（1960年后）已渗透到至少12米的深度沿着被活根占据的通道。在原生植被已被清除的地方，没有发现自1960年以来在深度> 2.5米处作为雨水降落的水。18 O和氘的浓度表明，一些水运动到本地植被的根是在气相中。
In a semi-arid area of southern Australia a change in land use from Eucalyptus scrub to cropping with wheat caused considerable change in the mechanism of the movement of soil water and the amount of deep drainage. Chloride concentrations of soil water were used to show the mean annual amount of deep drainage increases from < 0.1 to .apprx. 3 mm yr-1 following clearing of the native vegetation. The concentration of environmental tritium in soil water beneath the native vegetation is consistent with the hypothesis that some relatively recent water (post 1960) has penetrated to depths of at least 12 m along channels occupied by living roots. Where the native vegetation has been cleared, no water which fell as rain since 1960 was found at depths > 2.5 m. 18O and deuterium concentrations suggest that some water movement to the roots of the native vegetation is in the vapor phase.