Knowledge Resource Center for Ecological Environment in Arid Area
DOI | 10.1002/esp.1039 |
Hydrological connectivity of soil pipes determined by ground-penetrating radar tracer detection | |
Holden, J | |
通讯作者 | Holden, J |
来源期刊 | EARTH SURFACE PROCESSES AND LANDFORMS |
ISSN | 0197-9337 |
出版年 | 2004 |
卷号 | 29期号:4页码:437-442 |
英文摘要 | Soil pipes are common and important features of many catchments, particularly in semi-arid and humid areas, and call contribute a large proportion Of runoff to river systems. They may also significantly influence catchment sediment and solute yield. However, there are often problems in finding and defining soil pipe networks which Lire located deep below the surface. Ground-penetrating radar (GPR) has been used for non-destructive identification and mapping of soil pipes in blanket peat catchments. While GPR call identify subsurface cavities, it cannot alone determine hydrological connectivity between one cavity and another. This paper presents results from an experiment to test the ability of GPR to establish hydrological connectivity between pipes through use of a tracer solution. Sodium chloride was injected into pipe cavities previously detected by the radar. The GPR was placed downslope of the injection points and positioned on the ground directly above detected soil pipes. The resultant radargrams showed significant changes in reflectance from some cavities and no change from others. Pipe waters were sampled in order to check the radar results. Changes in electrical conductivity of the pipe water could be detected by the GPR, without data post-processing, when background levels were increased by more than approximately twofold. It was thus possible to rapidly determine hydrological connectivity of soil pipes within dense pipe networks across hillslopes without ground disturbance. It was also possible to remotely measure travel times through pipe systems; the passing of the salt wave below the GPR produced an easily detectable signal on the radargram which required no post-processing. The technique should allow remote sensing of water sources and sinks for soil pipes below the surface. The improved understanding of flowpath connectivity will be important for understanding water delivery, solutional and particulate denudation, and hydrological and geomorphological model development. Copyright (C) 2004 John Wiley Soils. Ltd. |
英文关键词 | ground-penetrating radar soil pipes peat uplands runoff tracers subsurface hydrology pipeflow |
类型 | Article |
语种 | 英语 |
国家 | England |
收录类别 | SCI-E |
WOS记录号 | WOS:000221095400003 |
WOS关键词 | BLANKET PEAT ; PIPEFLOW ; CATCHMENT |
WOS类目 | Geography, Physical ; Geosciences, Multidisciplinary |
WOS研究方向 | Physical Geography ; Geology |
资源类型 | 期刊论文 |
条目标识符 | http://119.78.100.177/qdio/handle/2XILL650/146571 |
作者单位 | (1)Univ Leeds, Sch Geog, Leeds LS2 9JT, W Yorkshire, England |
推荐引用方式 GB/T 7714 | Holden, J. Hydrological connectivity of soil pipes determined by ground-penetrating radar tracer detection[J],2004,29(4):437-442. |
APA | Holden, J.(2004).Hydrological connectivity of soil pipes determined by ground-penetrating radar tracer detection.EARTH SURFACE PROCESSES AND LANDFORMS,29(4),437-442. |
MLA | Holden, J."Hydrological connectivity of soil pipes determined by ground-penetrating radar tracer detection".EARTH SURFACE PROCESSES AND LANDFORMS 29.4(2004):437-442. |
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