半干旱区深层土壤水分含量特征

由于浅层地下水位大幅度下降，太行山山前平原半干旱区形成厚达20～30m的不饱和层。本研究就该区厚不饱和层土壤水分状况及其主控因素展开研究，以期为已有土壤水分运动模型及开发新模型提供参数依据。研究在河道区利用钻机进行深层土壤取样，利用相关分析和回归分析对近20m厚的不饱和层中土壤含水量及岩性的关系进行了分析。河道区岩性较单一，含水量变异较小，2m以下土壤含水量与岩性具极高的相关性，可以初步认为厚不饱和层土壤含水量处于田间持水量状态，并且通过回归方程根据岩性可以估算土壤含水量。

Character of deep soil moisture distribution in semiarid area in North China

The rapid decline of the aquifer water table in the piedmont of Mt. Taihang over the past several decades has resulted in a thick vadose zone of more than 20 meters. The soil moisture distribution in this thick vadose zone is studied and the major control factors for such a distribution are tried to identified herein, so as to provide field observed data and parameters for calibrating and verifying the existing theories and models of the soil moisture movement in such a thick vadose zone; for which a long segment of soil core is collected and the soil moisture distribution and lithology for different depths via laboratory measurements are obtained. At last, a statistical analysis on the correlation between of the soil moisture distribution and the corresponding lithology concerned is made as well.