Measuring thaw depth beneath peat‐lined arctic streams using ground‐penetrating radar
Measuring thaw depth beneath peat‐lined arctic streams using ground‐penetrating radar
复制标题
使用探地雷达测量泥炭衬里的北极溪流下方的解冻深度
DOI：
10.1002/hyp.5781
复制
发表时间：
2005
影响因子：
3.2
通讯作者：
M. Gooseff
中科院分区：
文献类型：
--
作者：
J. Bradford;J. McNamara;W. Bowden;M. Gooseff
在北极河流中，河道下方的融化深度可能是控制潜流带水文和生物地球化学循环的重要参数。作为该系统跨学科研究的一部分，我们进行了实地调查，以测试使用探地雷达（GPR）对子流永久冻土层进行成像的有效性。我们调查了三个地点，其特征是低能量水流、河床衬里的有机物质以及水深从 0·2 到 2 m 的范围。我们使用 200 MHz 脉冲雷达系统获取数据，该系统的天线安装在小橡皮艇的底部，橡皮艇被拉过河流，同时以恒定速率触发雷达。我们在所有三个地点都取得了出色的成果，在河流周围和下方的永久冻土边界都获得了清晰的连续图像。我们的结果表明，探地雷达可以成为测量支流融化深度的有效工具。版权所有 © 2005 约翰·威利父子有限公司
In arctic streams, depth of thaw beneath the stream channel is likely a significant parameter controlling hyporheic zone hydrology and biogeochemical cycling. As part of an interdisciplinary study of this system, we conducted a field investigation to test the effectiveness of imaging substream permafrost using ground‐penetrating radar (GPR). We investigated three sites characterized by low‐energy water flow, organic material lining the streambeds, and water depths ranging from 0·2 to 2 m. We acquired data using a 200 MHz pulsed radar system with the antennas mounted in the bottom of a small rubber boat that was pulled across the stream while triggering the radar at a constant rate. We achieved excellent results at all three sites, with a clear continuous image of the permafrost boundary both peripheral to and beneath the stream. Our results demonstrate that GPR can be an effective tool for measuring substream thaw depth. Copyright © 2005 John Wiley & Sons, Ltd.