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以沧州和衡水实验站为华北平原地下水浅埋区典型区,利用3 a土壤水负压和地下水观测数据,研究了不同年份和土壤质地土壤水分动态。土壤水分数据表明,平水年或丰水年后的枯水年土壤水分从表层到深层为增长型趋势,枯水年为增长—减小—增长趋势;在土壤非均值条件下(沧州),土壤水分具有补给和消耗的季节性变化,而土壤均质条件下(衡水),无明显季节性变化。时间序列分析结果表明,平水年或丰水年沧州实验点土壤浅层(100 cm以上)和深层(100 cm以下)具有明显差异,从上到下土壤水分更加稳定,衡水实验点无明显差异性;枯水年两实验站浅层和深层差异性更小。土壤质地在降水和土壤水以及地下水的响应关系方面具有显著作用。
Taking Cangzhou and Hengshui Experimental Station as the typical area of shallow groundwater in the North China Plain, soil water dynamics in different years and soil texture were studied by using 3 a soil water negative pressure and groundwater observation data. Soil moisture data showed that in dry years or dry years, the soil moisture in the dry years increased gradually from the surface to the deeper layers, and increased / decreased-increased in the dry years; in the non-uniform soil conditions (Cangzhou), soil Moisture has a seasonal change of supply and consumption, but no significant seasonal change in soil homogenization (Hengshui). The results of time series analysis showed that there was a significant difference between the shallow soil layer (above 100 cm) and the deep layer (below 100 cm) in Cangzhou experimental site in flat or wet years, the soil moisture was more stable from top to bottom, and there was no significant difference in Hengshui experimental sites ; Dry years, the difference between shallow and deep experimental stations is smaller. Soil texture has a significant role in the response of precipitation to soil water and groundwater.