地球物理学进展 ›› 2019, Vol. 34 ›› Issue (2): 840-848.doi: 10.6038/pg2019CC0063

• 应用地球物理学Ⅱ(海洋、工程、环境、仪器等) • 上一篇    下一篇

基于三维高密度电法的黄土灌溉水入渗方式研究

张先林,许强(),彭大雷,赵宽耀   

  1. 成都理工大学地质灾害防治与地质环境保护国家重点实验室,成都 610059
  • 收稿日期:2018-06-06 修回日期:2018-12-11 出版日期:2019-04-20 发布日期:2019-05-13
  • 通讯作者: 许强 E-mail:xq@cdut.edu.cn
  • 作者简介:张先林,男,1992年生,四川南江人,硕士研究生,主要从事地球物理探测与地质灾害研究.(E-mail:296908858@qq.com)
  • 基金资助:
    国家自然科学基金重点项目(41630640);国家重点基础研究发展计划(973计划)联合资助(2014CB744703)

Study on the infiltration mode of irrigation water in loess based on three-dimensional high-density electrical method

ZHANG Xian-lin,XU Qiang(),PENG Da-lei,ZHAO Kuan-yao   

  1. State Key Laboratory of Geohazard Prevention and Geoenvironment Protection Chengdu University of Technology Chengdu 610059 China
  • Received:2018-06-06 Revised:2018-12-11 Online:2019-04-20 Published:2019-05-13
  • Contact: Qiang XU E-mail:xq@cdut.edu.cn

摘要:

灌溉诱发型黄土滑坡是我国西北地区主要地质灾害之一.为研究灌溉水在黄土层中的入渗方式,对位于甘肃省的一处黄土层中无裂隙发育的农业用地进行了灌溉试验,通过人工引水灌溉模拟还原农业灌溉水的入渗过程,利用三维高密度电法对灌溉水的入渗过程进行了表征.其后,通过Res3 Dinv三维处理软件对监测数据进行了多次反演计算,利用Voxler软件平台对黄土灌溉水入渗过程的电法反演数据进行三维可视化处理.试验成果表明,灌溉水在浅层均质黄土层中主要以竖向的“活塞式”运移为主,侧向运移能力较弱.当深度达到5.56 m时,深部黄土中含水率几乎不再增加,其入渗方式发生明显变化,即可能由液态水运移转化为水汽运移.通过传感器监测数据及竖井验证,本次三维电法效果较好,证明利用三维高密度电阻率法在黄土地区进行灌溉水入渗方式研究是切实可行的.

关键词: 黄土滑坡, 灌溉水, 入渗方式, 三维高密度电法, Voxler软件平台

Abstract:

Irrigation-induced loess landslide is one of the major geologic disasters in Northwest China. In order to study the infiltration mode of irrigation water in the loess layer, an irrigation experiment was carried out on agricultural land with no fissure development in the loess layer in Gansu Province. The infiltration process of agricultural irrigation water was simulated by artificial diversion irrigation. And the infiltration process of irrigation water is continuously monitored by three-dimensional high-density electrical method. Then, the Res3 Dinv processing software was used to calculate the monitoring data. After that, three-dimensional visualization of electrical data inversion process of loess irrigation water infiltration process was carried out by using Voxler software platform. The experimental results show that the vertical “piston” migration is the main type of irrigation water in the shallow homogeneous loess layer, and the lateral migration ability is weaker. When the depth reaches 5.56 m, the water content in the deep layer is almost no longer increased, and the infiltration mode changes obviously, that is, it may be transformed from liquid water transport to vapor migration. The three-dimensional electrical method has a good effect with the sensor monitoring data and vertical shaft verification, which proves that it is feasible to use the three-dimensional high-density resistivity method to study the infiltration method of irrigation water in the loess region.

Key words: Loess landslide;Irrigation water, Infiltration mode, Three-dimensional high-density electrical method, Voxler software platform

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