| 摘要: |
| 对北京市大兴区3种典型土壤的水分入渗规律及其影响因素进行试验研究。用双套环法田间现场测定了大兴区11个试验点的土壤水分入渗过程,运用经验模型对各试验点的入渗曲线进行拟合。结果表明:入渗过程达到稳定的时间由快到慢依次为壤质砂土、砂质壤土和粉砂壤土;初始含水率与入渗初始阶段的速率呈线性相关关系;土壤结构和干扰等条件基本一致的前提下,稳定入渗率由大到小依次为壤质砂土、砂质壤土和粉砂壤土;土壤质地大致相同的条件下,土壤容重越大,其稳定入渗率越小。总体上,Horton入渗模型在该研究区域适用性较好。 |
| 关键词: 北京市大兴区 双套环法 入渗 土壤类型 田间试验 |
| DOI：10.11841/j.issn.1007-4333.2009.04.090 |
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| 基金项目:国家自然科学基金资助项目(50779066);;国家“973”计划课题(2006CB403406);;北京市重点学科“水文学及水资源”重点建设项目 |
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| Field experimental study on soil infiltration process of Daxing District,Beijing |
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| Abstract: |
| The infiltration process and its influencing factors of 3 typical soils in Daxing District,Beijing were studied.Double-ring method was used to measure the soil infiltration curves of 11 sites.At the same time,the infiltration curves were developed with empirical models.The result shows that the infiltration process in the loamy sand reaches stable fastest,and it takes a longer time to reach stable in the sandy loam,and the silty loam reaches stable the slowest;there is a linear correlation between the initi... |
| Key words: Daxing District Beijing double-ring method infiltration soil type field experiment |
