摘要
通过对奎屯河流域包气带土壤取样分析,探讨了土壤包气带的盐分分布特征和影响因素。结果表明,在水平方向上,由南至北,表土含盐量逐渐增大。在垂直方向上,在地下水位埋藏较浅的细土平原及冲积平原区,包气带含盐量随深度增加逐渐减小;在人工耕地洪泛冲积平原、细土平原则呈随深度的增加而增加的趋势;包气带岩性结构较单一且潜水位埋藏比较深的地区,包气带含盐量随深度增加而出现微小波动。分析结果显示:地形、地貌和潜水位埋深是影响该区包气带盐分分布的主控因素,而人为的大面积灌溉又加速了积盐的过程。
Through analyzing the salt contents in suspended soils of the Kuitun River basin, the distribution regularity and the affecting factors of soil salt of the Kuitun River basin are studied. The surface soil salt content increases gradually from south to north in the horizontal direction. In the vertical direction of the alluvial-proluvial plain and the plain where groundwater table is shallow, the soil salt content increases with the gradual decreasing of depth. In agricultural area of the alluvial-proluvial plain and the plain, the soil salt content increases with the increasing of depth. In the area where the lithological structure of unsaturated soil is unitary and the ground water level buries quite deep, the salt content present a tendency of small undulation with the increasing of depth. It is thought that the landform and the burying depth of ground water level are the main factors affecting the distribution of Unsaturated soil salinity in this area, and the powerful and widespread artificial irrigation have accelerated the accumulation process of salty.
出处
《地球科学与环境学报》
CAS
2008年第4期429-433,共5页
Journal of Earth Sciences and Environment
基金
中国地质调查局项目(2003100100012)
关键词
含盐量
包气带
分布特征
奎屯河
salt content
unsaturated soil
distributed eharacteristic
Kuitun River
