国立研究開発法人 国際農林水産業研究センター | JIRCAS

A Study of the Sealing Effect in the Observation Well of the Freshwater Lens at Laura Island, Republic of the Marshall Islands

JARQ : Japan Agricultural Research Quarterly
ISSN
00213551
書誌レコードID(総合目録DB)
AA0068709X
本文フルテキスト

The authors have been conducting research with the aim of developing methods to preserve and effectively use groundwater resources. This research has been ongoing since 2008 with the focus on Laura Island, Majuro Atoll, Republic of the Marshall Islands. Examination of the groundwater level potentials in pre-existing observation wells at Site No. 6, named by the United States Geological Survey (USGS), showed no difference in the groundwater level potential along the depth. Accordingly, observation well No. 6-N was established by boring to accurately observe the profiles of electric conductivity (EC) of groundwater. However, salt water intrusion occurred, contrary to the observed results for the groundwater level potential. Accordingly, the depth of the salt water intrusion was identified by developing a double packer, observation well No. 6-N was partially sealed and the sealing effect on the observation well was confirmed. This paper will discuss 1) the measures against salt water intrusion which occurred in the observation well, 2) the groundwater flow in an observation well, which was established to measure electric conductivity (EC) profiles of the groundwater, and 3) the depth of the groundwater path estimated by measuring EC profiles with a double packer in the observation well.

刊行年月2013-07-01
作成者KODA KazuhisaMANPUKU YuzoKOBAYASHI TsutomuISHIDA SatoshiYOSHIMOTO ShuheiOKUBO Masaaki
著者キーワード

double packer

electric conductivity

groundwater flow

groundwater level potential

公開者Japan International Research Center for Agricultural Sciences
データ作成日2013-07-01
国立情報学研究所メタデータ主題語彙集(資源タイプ)Journal Article
47
3
開始ページ257
終了ページ272
DOI10.6090/jarq.47.257
権利Japan International Research Center for Agricultural Sciences
言語eng