1970—2012年山西省土壤水时空变化规律

Spatiotemporal Variations of Soil Moisture in Shanxi Province During 1970—2012

以山西省1970—2012年25个墒情站土壤墒情观测资料为基础,在Arc GIS环境下通过IDW插值法,以及采用气候倾向率、MK秩次相关检验法和年代际距平百分率等方法,对其土壤墒情的时空变化规律进行了分析。结果表明:山西省土壤含水量整体呈现南、北低,中间高,东南最大的趋势;不同深度土壤层的土壤水在空间上的分布规律与剖面均值保持一致;近43 a土壤含水量整体呈增加趋势,20世纪70年代和21世纪00年代水平土壤含水量略高。山西省土壤水在时间和空间上的分布规律具有一定的稳定性。

This paper analyzed the spatiotemporal variations of soil moisture in Shanxi Province during 1970—2012 by using analytical methods such as inverse distance weighted interpolation, climate trend rate, Mann-Kendall trend test, etc. The results showed that the soil moisture content was generally low in the south and north, while it was high in the middle and the highest part was in the southeast. The horizontal-spatial distribution law of soil moisture in different soil layers was consistent with the average value. The soil moisture increased in the past 43 years,which showed a slightly higher water content in 1970 s and 2000 s. The soil water had certain stability both in time and space distribution.