| 西安地区黄土含水率变化特点 |
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| 引用本文： | 徐芹选,赵景波.西安地区黄土含水率变化特点[J].现代地质,2002,16(4):435-438. |
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| 作者姓名： | 徐芹选 赵景波 |
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| 作者单位： | 1. 山东省青岛市环境保护局城阳分局,山东,青岛,266109
2. 中国科学院地球环境研究所,黄土与第四纪地质国家重点实验室,陕西西安,710075;陕西师范大学,旅游与环境学院,陕西,西安,710062 |
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| 基金项目： | 国家自然科学基金项目 (4 0 0 710 0 6)，教育部重大项目 (0 1JAZJD770 0 14 )。 |
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| 摘 要： | 通过对西安地区黄土剖面的野外观察、颗粒分析和含水率的测定 ,系统地研究了黄土层含水率的变化特点 ,初步认识到在同一黄土剖面上 ,黄土含水率从上到下呈波动变化 ,其峰值位于古土壤层内 ,而波谷处于黄土层内 ,并呈波动增加的趋势。在具有结核层的黄土层中 ,其含水率从上部到下部呈由大变小再变大的趋势 ,其峰值位于结核层之上 ,CaCO3 结核层具有隔水作用 ;在古土壤层中 ,从上向下 ,其含水率呈由小变大再变小的规律 ,其峰值出现在古土壤的中、下部位 ,即粘土化最强的部位。土壤质地是决定含水率大小的重要因素 ,在包气带中 ,黄土含水率的变化与粘土颗粒含量具有明显的正相关关系。
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| 关 键 词： | 黄土层 含水率 结核层 粘土颗粒 西安地区 |
| 文章编号： | 1000-8527(2002)04-0435-04 |
| 修稿时间： | 2002年4月15日 |
THE CHANGE CHARACTERISTIC OF MOISTURE CONTENT OF LOESS STRATUM IN THE XI'AN AREA |
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| XU Qin-xuan,ZHAO Jing-bo.THE CHANGE CHARACTERISTIC OF MOISTURE CONTENT OF LOESS STRATUM IN THE XI''AN AREA[J].Geoscience——Journal of Graduate School,China University of Geosciences,2002,16(4):435-438. |
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| Authors: | XU Qin-xuan ZHAO Jing-bo |
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| Institution: | XU Qin-xuan1,ZHAO Jing-bo 2,3 |
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| Abstract: | On the basis of the field investigation,the actual deter mination data of moisture content and particulate component of the loess stratum in the Xi'an area,the moisture content of loess has been studied. It is known preliminarily that the moisture content of the loess has the charact eristic of undulate change and has the trend of increasing fluctuation from top to bottom in the same loess section.The apex is in the paleosoil and the trough lies in the loess stratum.The moisture content from top to bottom in the loess s tratum with CaCO_3 nodule varies from big to little then to big,and the pea k of it is on the top of the CaCO_3 nodule,which has the effects of separating water.On the contrary the change pattern of the moisture content from top to bot tom in the paleosol stratum is on the increase and then on the decrease,and the highest value of it lies in the middle or lower section,where the content of cl ay particles is at its maximum.The soil character is an important factor to de cide the magnitude of the moisture content and the change between the moisture c ontent and the content of clay particles shows a positive relativity. |
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| Keywords: | loess stratum moisture content nodule section clay parti cles the Xi'an area |
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