针对绿洲内部土壤盐渍化发生的现状,以三工河流域中上游阜康绿洲为研究区,运用遥感与GIS技术,结合地统计学方法研究了0—20 cm土层盐分动态特征及其主导因素。结果表明:①研究区各种景观类型间转移剧烈,区域绿洲化作用强于荒漠化; ②通过对1982年和2005年土壤盐分的理论模型拟合,符合球形模型,并且F检验达到极显著水平; ③Kriging插值及其与同期的绿洲景观类型图叠加运算表明,土壤盐渍化具有向北推进的趋势,南部绿洲土壤盐化程度减弱,北部绿洲土壤盐渍化程度加重;④农业灌溉具有一定的洗盐作用,使得南部绿洲土壤盐化程度减轻;北部绿洲,由于地下水作用,使得土壤盐化程度加重。
Aiming at the problem of soil salinization existed inside oasis a case study was carried out on the Fukang oasis in upper and middle reaches of Sangonghe River basin. The spatial and temporal distributing characteristics of soil salinity in the topsoil (0—20 cm) and its key influencing factor were studied with the combination of methods in geo-statistics, GIS and RS. The result showed that: ①Transition between landscape types was frequent, and the process of oasization was faster than desertification in Fukang oasis; ②Spherical model was fitted for both data sets in 1982 and 2005, with high level of confidence after F-test;③Mapping of soil salinity by Kriging and its comparison with land use maps showed that the degree of soil salinization in south oasis was lower than that in north oasis, and there was a trend of moving from south to north; ④The degree of soil salinizaiton in south oasis was weaken by agricultural irrigation, but the degree of soil salinization in north was intensified by groundwater action.
- 王玉刚;肖笃宁;李 彦. 三工河流域中上游绿洲土壤盐化的时空动态[J]. 中国沙漠, 2008, 28(3): 478-484.
- WANG Yu-gang;XIAO Du-ning;LI Yan. Spatial and Temporal Dynamics of Oasis Soil Salinization in Upper and Middle Reaches of Sangonghe River, Northwest China[J]. JOURNAL OF DESERT RESEARCH, 2008, 28(3): 478-484.