Cross-hole geo-radar monitoring for moisture distribution and migration in soil beneath an infiltration pit: A case study of an artificial groundwater recharge test in Niigata, Japan

被引：1

作者：

Kuroda, S ^{[1
]}

Nakazato, H ^{[1
]}

Nihara, S ^{[1
]}

Hatakeyama, M ^{[1
]}

Takeuchi, M ^{[1
]}

Asano, M ^{[1
]}

Todoroki, Y ^{[1
]}

Konno, M ^{[1
]}

机构：

[1] Natl Inst Rural Engn, Tsukuba, Ibaraki 3058609, Japan

来源：

GPR 2002: NINTH INTERNATIONAL CONFERENCE ON GROUND PENETRATING RADAR | 2002年 / 4758卷

关键词：

borehole radar; soil water migration; vadose zone; infiltration pit test; artificial groundwater recharge;

D O I：

10.1117/12.462258

中图分类号：

TP18 [人工智能理论];

学科分类号：

081104 ; 0812 ; 0835 ; 1405 ;

摘要：

Continuous monitoring by time-lapse and repetitive measurements using cross-hole geo-radar was conducted to investigate soil moisture distribution arid migration beneath an infiltration pit for artificial groundwater recharge. This monitoring enabled us to clarify the infiltration process from the infiltration pit into the vadose zone in a quantitative, nondestructive, and noninvasive way. The infiltration pit was 2.0 x 2.0 m square and 23 m deep between 2 boreholes in gravel soil. The groundwater table was at about -10 m. We monitored the vertical distribution of electromagnetic wave traveltime beneath the infiltration pit by repetitive measurements using cross-hole geo-radar profiling with zero-offset gathering. Traveltime was distinctly retarded from the upper layer to the deeper one after ponding of the pit. The downward retardation velocity of the infiltration rate into the soil was estimated at 8 x 10(-2) cm/s. The estimated values for water content and water seepage rate in the soil were almost coincident with the directly measured values. In our case of an infiltration pit test, cross-hole geo-radar monitoring was an efficient, noninvasive method for visualizing the infiltration process and estimating water migration properties of the soil on a macro scale.

引用

页码：703 / 707

页数：5

共 5 条

[1]

Hubbard S.S., 1997, The leading Edge, V16, P1623, DOI DOI 10.1190/1.1437539

[2]

KURODA S, 2001, P 104 SEGJ C TOK JAP, P225

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