Monitoring pumping test response in a fractured aquifer using ground-penetrating radar

被引:57
作者
Tsoflias, GP [1 ]
Halihan, T [1 ]
Sharp, JM [1 ]
机构
[1] Univ Texas, Dept Geol Sci, Austin, TX 78712 USA
关键词
Aquifers - Fracture mechanics - Ground penetrating radar systems - Mathematical models - Waveform analysis;
D O I
10.1029/2000WR900297
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
Fractured aquifers present a number of problems when attempting to characterize flow on the well scale (less than 100 m). Standard hydraulic testing methods are expensive because of the need for installation of monitoring wells. Geophysical methods may suffer from a lack of resolution and nonunique solutions to data interpretation. We used ground-penetrating radar (GPR) surveying during a pumping test in a well-characterized, fractured, carbonate aquifer to monitor the response of a permeable subhorizontal fracture plane. We observed radar signal amplitude and waveform variations along a fracture reflector and correlated the radar signal response to changes in the water saturation of the fracture. Combining hydraulic measurements with GPR data and electromagnetic modeling, we identified an asymmetric fracture drainage pattern, provided accurate spatial information about the saturation of the fracture, and detected the presence of hydraulic boundaries. This study demonstrates that GPR surveying can be used successfully for real-time monitoring of pumping tests in fractured carbonate aquifers.
引用
收藏
页码:1221 / 1229
页数:9
相关论文
共 22 条
[1]  
ANDRES AL, 1997, S APPL GEOP ENG ENV, V1, P483
[2]   APPLICATION OF GROUND-PENETRATING-RADAR METHODS IN HYDROGEOLOGIC STUDIES [J].
BERES, M ;
HAENI, FP .
GROUND WATER, 1991, 29 (03) :375-386
[3]  
BIRKEN R, 1998, 7 INT C GROUND PEN R, V1, P377
[4]  
BRADBURY KR, 1992, 922 WOFR WIS GEOL NA
[5]   GROUND-PENETRATING RADAR MONITORING OF A CONTROLLED DNAPL RELEASE - 200 MHZ RADAR [J].
BREWSTER, ML ;
ANNAN, AP .
GEOPHYSICS, 1994, 59 (08) :1211-1221
[6]   GROUND-PENETRATING RADAR FOR HIGH-RESOLUTION MAPPING OF SOIL AND ROCK STRATIGRAPHY [J].
DAVIS, JL ;
ANNAN, AP .
GEOPHYSICAL PROSPECTING, 1989, 37 (05) :531-551
[7]  
EIER J, 1995, FRACTURED JOINTED RO, P511
[8]  
ENDRES AL, 2000, IN PRESS GROUND WATE
[9]  
Fetter, 1980, APPL HYDROGEOLOGY
[10]   Velocity variations and water content estimated from multi-offset, ground-penetrating radar [J].
Greaves, RJ ;
Lesmes, DP ;
Lee, JM ;
Toksoz, MN .
GEOPHYSICS, 1996, 61 (03) :683-695