...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Subsurface Sensing Technologies and Applications >Application of GPR in the Study of a Modern Alluvial M egafan: The Case of the Taquari River in Pantanal Wetland, West-Central Brazil
【24h】

Application of GPR in the Study of a Modern Alluvial M egafan: The Case of the Taquari River in Pantanal Wetland, West-Central Brazil

机译：GPR在现代冲积性研究中的应用：以巴西中西部Pantanal湿地的Taquari河为例

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

A novel and timely ground penetrating radar (GPR) survey has been carried out in Pantanal from Mato Grosso State, west-central Brazil. Fieldwork was carried out on February/2001 and August/2002 in an attempt to understand avulsion processes that are occurring within Taquari alluvial megafan. The main objectives were to map channel, crevasse and floodplain morphology, as well as active sedimentary bedforms. Many GPR profiles were acquired in the medium and lower Taquari River course. Subaqueous megaripples and exposed sand bars were identified in the medium fan area. Similar features were observed in the lower fan channels, where there were many crevasses in the marginal levees. During the flooding seasons, the flow splays out on to the floodplain, where new distributary channels are being formed. GPR data show that the lower fan, Taquari channel is topographically higher than the adjacent floodplain, thus favoring avulsion as a natural process of river course shifting. GPR data obtained during the wet and dry seasons, together with sedimentology information have been very important in characterizing the fluvial dynamics, and avulsion phenomena.
机译：巴西中西部马托格罗索州潘塔纳尔市（Pantalal）进行了及时的新型探地雷达（GPR）调查。野外工作于2001年2月/ 2002年和2002年8月进行，以了解Taquari冲积巨扇内发生的撕脱过程。主要目标是绘制河道，裂隙和洪泛区形态以及活动的沉积床形图。在塔夸里河中下游河段获得了许多GPR资料。在中等扇形区域发现了水下巨波纹和裸露的沙洲。在下扇形通道中观察到了类似的特征，那里的边缘堤岸上有很多裂缝。在洪水季节，水流扩散到洪泛区，在那里形成新的分配渠道。 GPR数据显示，下部扇形Taquari河道在地形上高于相邻的洪泛区，因此有利于撕脱作为河道平移的自然过程。湿季和干季期间获得的GPR数据以及沉积学信息对于表征河流动力学和撕脱现象非常重要。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号