| 陕西洛川中更新统下部黄土入渗规律研究 |
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| 引用本文： | 赵景波,张允,陈宝群,董治宝.陕西洛川中更新统下部黄土入渗规律研究[J].土壤学报,2009,46(6):965-972. |
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| 作者姓名： | 赵景波 张允 陈宝群 董治宝 |
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| 作者单位： | 1. 陕西师范大学旅游与环境学院,西安,710062;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,西安,710075
2. 陕西师范大学旅游与环境学院,西安,710062 |
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| 基金项目： | 国家自然科学基金项目，教育部长江学者项目，中国科学院黄土与第四纪地质国家重点实验室项目 |
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| 摘 要： | 通过对陕西洛川凤栖镇剖面黄土与红色古土壤8个层位的入渗实验及孔隙度与CaCO3含量测定,研究了黄土与古土壤入渗特征和地下水富集条件。结果表明,陕西洛川西沟L4、L5、L6和L7黄土的稳定入渗率较大,4个层位的平均值为0.65 mm min-1;S4、S5、S6和S7古土壤稳定入渗率较小,4个层位的平均值为0.37 mm min-1;黄土层达到稳定入渗的时间较短,一般为60~90 min,红色古土壤达到稳定入渗的时间较长,一般为90~120 min。黄土层含水空间发育好、渗透性强和利于成为含水层,这是冷干的气候动力条件决定的。红褐色古土壤层含水空间发育较差、渗透性弱和利于成为隔水层,这是温湿的气候动力条件决定的。将洛川西沟剖面渗水实验数据用三种入渗公式分别进行拟合得出,通常采用的三个经验公式均适用于描述40万~70万a间发育的黄土和红色古土壤层的入渗规律。本文的研究拓宽了第四纪气候变化理论应用的新领域,表明更新世气候变化在黄土地层土壤水和地下水资源富集条件、富集规律和水资源开发利用研究中有重要应用价值。
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| 关 键 词： | 洛川黄土 入渗规律 含水层 隔水层 |
| 收稿时间： | 2009/1/20 0:00:00 |
| 修稿时间： | 2009/6/25 0:00:00 |
Law of water infiltration of lower part of middle Pleistocene loess in Luochuan of Shaanxi |
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| zhao jingbo,Zhang Yun,Chen Baoqun and Dong Zhibao.Law of water infiltration of lower part of middle Pleistocene loess in Luochuan of Shaanxi[J].Acta Pedologica Sinica,2009,46(6):965-972. |
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| Authors: | zhao jingbo Zhang Yun Chen Baoqun and Dong Zhibao |
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| Institution: | College of Tourism and Environmental Science, Shaanxi Normal University; State Key Laboratory of Loess and Quaternary Geology, Environmental Institute of Earth, Chinese Academy of Sciences,College of Tourism and Environmental Science, Shaanxi Normal University,College of Tourism and Environmental Science, Shaanxi Normal University and College of Tourism and Environmental Science, Shaanxi Normal University |
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| Abstract: | A water infiltration experiment,soil porosity and CaCO_3 content determination was conducted at Fengqi in Luochuan of Shaanxi Province on soil profiles of loess and palesol to explore infiltration characteristics and the conditions for groundwater enrichment. Results show that stable infiltration rate of Horizon L_4, L_5, L_6 and L_7 of Loess profile in Xigou, Luochuan, was higher, averaging 0.65 mm min~(-1) and the stable infiltration rate of Horizon S_4, S_5, S6 and S_7 was lower, averaging 0.37 mm min~(-1). In the loess profile infiltration rate leveled off quickly, generally within 60～90 minutes, while in the palesol it did slower, usually within 90～120 minutes. With higher porosity and higher infiltration rate, the loess had a well-developed aquifer, which is attributed to the dynamics of cold-dry climate. Low in porosity and weak in permeability, paleosol tended to form an impermeable layer, which is attributed to the dynamics of warm and humid climate. Attempts were made to fit the three infiltration equations with the data obtained from the infiltration experiment. The three empirical formula commonly used are all applicable to describe infiltration law of loess and paleosol 400 ka～700 ka BP old. The findings of the study have opened up a new field for application of the theory of climatic change in the Quaternary. It is quite clear that the information of climate change in the Pleistocene is of high application value in the study on conditions of enrichment of soil water groundwater and rules of the enrichment, and exploitation of the water resources. |
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| Keywords: | Loess in Luochuan Infiltration rule Aquifer Impermeable Layer |
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