滴灌条件下压砂对土壤水分入渗的影响

发布时间：2018-05-09 07:44

本文选题：砂地滴灌 + 点源入渗　；参考：《兰州理工大学学报》2017年01期

【摘要】：以压砂地不同种植年限为影响因子,裸地为参照组(CK),采用室内土槽模拟试验研究种植年限对压砂土壤点源入渗规律的影响.结果表明:压砂土壤垂直和水平累积入渗距离都符合Kostiakov入渗模型.累计入渗距离初期CK、中砂地、老砂地垂直入渗距离小于水平入渗距离,新砂地垂直入渗距离大于水平入渗距离;入渗中后期随着时间的增加新砂地累积入渗规律不变,中砂地、老砂地和CK的垂直入渗距离依次超过其水平入渗距离.入渗时间一定时垂直入渗深度新压砂地中压砂地老压砂地CK;新压砂地水平入渗距离明显小于其他压砂土壤,中、老压砂地和CK水平入渗距离无明显差异.入渗初期垂直入渗速率新压砂地中压砂地老压砂地CK,水平入渗速率老压砂地中压砂地CK新压砂地;入渗中后期垂直和水平入渗速率减缓并趋于稳定.
[Abstract]:The effect of planting time on point source infiltration of sand compaction soil was studied by indoor soil trough simulation test with different planting years of sand compaction land as influence factor and naked land as reference group. The results show that the vertical and horizontal cumulative infiltration distance of sand compaction soil accords with Kostiakov infiltration model. Accumulative infiltration distance CK. vertical infiltration distance of middle sand land and old sand land is smaller than horizontal infiltration distance, vertical infiltration distance of new sand is larger than horizontal infiltration distance. The vertical infiltration distance between the old sand land and CK is higher than its horizontal infiltration distance. When the infiltration time is fixed, the depth of vertical infiltration is constant, and the horizontal infiltration distance of the new sand compaction soil is obviously smaller than that of other sand compaction soils, and there is no obvious difference between the old sand compaction land and CK horizontal infiltration distance. In the early stage of infiltration, the vertical infiltration rate of the new sand pressure ground is the same as that of the middle pressure sand field, and the horizontal infiltration rate is slow down and tends to be stable in the middle and late stage of infiltration.
【作者单位】：兰州理工大学能源与动力工程学院;
【基金】：国家自然科学基金(51269008,51409137)
【分类号】：S275.6;S152.7

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