无论在隔绝蒸发还是在自然蒸发条件下，短期内土壤水吸力有随土层深度的增加呈先下降后升高的趋势，而同一深度土层水吸力则随时间的推移而升高；
Regardless of preventing evaporation or not, soil water suction decreased firstly and then increased with the increase of soil depth, and soil water suction at the same depth increased with time.
随着时间的推移，土壤含水率的空间相关度降低。
As time passes by, spatial variability of soil moisture gradually weakens.
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