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利用土壤水分速测仪,获得黑河上游天老池流域2014年5-9月祁连圆柏林、灌木林、青海云杉林3个坡面0~60 cm土壤深度坡面土壤贮水量,通过时间稳定性分析,研究该区域坡面尺度的时间稳定性特征.结果表明:土壤贮水量的季节变化趋势与降雨动态基本一致,坡向和植被类型共同影响着土壤水分的空间分布.累积概率分析认为祁连圆柏林的时间稳定性最高.通过平均相对偏差、平均相对偏差的标准差、时间稳定性指数、平均绝对偏差误差确定了坡面土壤水分平均状态的代表性测点.3个坡面土壤贮水量的Spearman秩相关系数基本都在P<0.01的水平上显著,具有强烈的时间稳定性,Spearman秩相关系数为分析区域土壤贮水量的时间稳定性分析提供了便捷途径.
Using soil moisture tester, the water storage capacity of 0 ~ 60 cm soil depth slope in the three slopes of Qilian circle, shrub forest and Picea crassifolia in Tianzhuchi basin from May 2014 to September 2014 was obtained. The results showed that the seasonal variation trend of soil water storage was consistent with the rainfall dynamics, and the slope direction and the vegetation types affected the spatial distribution of soil moisture. The cumulative probability analysis indicated that the Qilian Round Berlin Is the most stable in time.The representative measurement points of average soil water content on slope were determined by means of average relative deviation, standard deviation of mean relative deviation, time stability index and mean absolute deviation error.The Spearman The rank correlation coefficients are all significant at the level of P <0.01, with strong temporal stability. The Spearman rank correlation coefficient provides a convenient way to analyze the time stability of soil water storage in the analysis area.