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東海・関東・伊豆地域における地下水等観測結果(2007 年 11 月～2008 年 4 月)(37)
The Variation of the Groundwater Level, Discharge Rate, Tilt meter,Three-Component Strain, and Subsidence in the Tokai, Kanto District andIzu Peninsula, Central Japan. (from November 2007 to April 2008) (37)
産業技術総合研究所
Geological Survey of Japan, AIST2007 年 11 月～2008 年 4 月の半年間の東海・関東・伊豆地域の地下水等の観測結果を報告する．本報告では，観測井配置図(第 1 図)の図中の枠で示す 4 地域および第 2 図に示す地域に分けて表示する．6 ヶ月間のデータを 3 ヶ月毎に示すとともに 2 年間の観測データを参考として示す(第 3～28 図)．また，浜岡・掛川における沈下等の観測結果（第 29，30図）についても示す．なお図中の印で，＄は保守を，＊は雨量補正不十分を，@は解析による見かけ上のギャップを，#はバッテリー消耗を，C はトンネル工事が原因と考えられる歪ステップを，？は原因不明をそれぞれ表す．
東海地域中部：榛原の水位上昇・低下は，静岡空港建設工事の盛土・土砂除去工事の影響による可能性が高い．2008 年 3 月中旬〜4 月にかけての草薙 1 の急激な水位上昇は，大雨により井戸上部から雨水が入り込んだためと思われる．
東海地域南部：御前崎の水位データに異常が認められるが，水位計の不具合の可能性が高い．
東海地域西部：特記事項はない．
伊豆半島東部地域：松原 174 号井は静岡県の観測による．伊東１は休日等に周囲の温泉使用量が増加すると自噴量が減少する．
これらのデータは WellWeb (http://www.gsj.jp/wellweb) にて公開している．
(大谷竜・小泉尚嗣・高橋誠・松本則夫・佐藤㪄㩷㩷㪊㪍㪇㩷㩷㪄努・北川有一・板場智史)

産業技術総合研究所地下水観測井配置図（東海・伊豆地域テレメータ連続観測）

東海地域中部
草薙藤枝
東海地域南部
豊橋東
豊橋
東海地域西部

榛原

江戸屋
松原174
冷川南

大室山北
伊東１
伊豆半島東部

掛川
小笠
大東浜岡

御前崎

╙ 1 ࿑ દ⼺࡮᧲ᶏ࿾ၞߩ↥ᬺᛛⴚ✚ว⎇ⓥᚲ࿾ਅ᳓╬᷹ⷰ੗ߩ㈩⟎࿑
Fig.1
Location of the groundwater observation wells in and around theTokai and Izu district.

↥ᬺᛛⴚ✚ว⎇ⓥᚲ࿾ਅ᳓᷹ⷰ੗㈩⟎࿑㧔ධ㑐᧲࿾ၞ࠹࡟ࡔ࡯࠲ㅪ⛯᷹ⷰ㧕ߟߊ߫Ꮉፒ

╙ 2 ࿑ 㑐᧲࿾ၞߩ↥ᬺᛛⴚ✚ว⎇ⓥᚲ࿾ਅ᳓╬᷹ⷰ੗ߩ㈩⟎࿑
Fig.2
Location of the groundwater observation wells in the Kantodistrict.

㪄㩷㩷㪊㪍㪈㩷㩷㪄╙ 3 ࿑ ᧲ᶏ࿾ၞਛㇱߩ࿾ਅ᳓╬ߩ᷹ⷰ⚿ᨐ(2007 ᐕ 11 ᦬㨪2008 ᐕ 1 ᦬)
Fig.3
Observed groundwater levels and others in the central Tokai
district from November 2007 to January 2008.

╙ 4 ࿑ ᧲ᶏ࿾ၞਛㇱߩ࿾ਅ᳓╬ߩ᷹ⷰ⚿ᨐ(2008 ᐕ 2 ᦬㨪2008 ᐕ 4 ᦬)
Fig.4
Observed groundwater levels and others in the central Tokai
district from February 2008 to April 2008.

╙ 5 ࿑ ⨲⭿᷹ⷰ੗ߩ࿾ਅ᳓࡮ᱡߩ᷹ⷰ⚿ᨐ(2007 ᐕ 11 ᦬㨪2008 ᐕ 1 ᦬)
Fig.5
Observed groundwater levels and strain at the Kusanagi
observation site from November 2007 to January 2008.

╙ 6 ࿑ ⨲⭿᷹ⷰ੗ߩ࿾ਅ᳓࡮ᱡߩ᷹ⷰ⚿ᨐ(2008 ᐕ 2 ᦬㨪2008 ᐕ 4 ᦬)
Fig.6
Observed groundwater levels and strain at the Kusanagi
observation site from February 2008 to April 2008.

㪄㩷㩷㪊㪍㪉㩷㩷㪄╙ 7 ࿑ ᧲ᶏ࿾ၞධㇱߩ࿾ਅ᳓╬ߩ᷹ⷰ⚿ᨐ(2007 ᐕ 11 ᦬㨪2008 ᐕ 1 ᦬)
Fig.7Observed groundwater levels and others in the southern Tokai
district from November 2007 to January 2008.

╙ 8 ࿑ ᧲ᶏ࿾ၞධㇱߩ࿾ਅ᳓╬ߩ᷹ⷰ⚿ᨐ(2008 ᐕ 2 ᦬㨪2008 ᐕ 4 ᦬)
Fig.8
Observed groundwater levels and others in the southern Tokai
district from February 2008 to April 2008.

╙ 9 ࿑ ᧲ᶏ࿾ၞ⷏ㇱ(⼾ᯅ࡮⼾ᯅ᧲)ߩ࿾ਅ᳓╬ߩ᷹ⷰ⚿ᨐ(2007 ᐕ 11 ᦬㨪2008 ᐕ 1 ᦬)
Fig.9
Observed groundwater levels and others at the Toyohashi andToyohashi-higashi observation sites from November 2007 toJanuary 2008.

╙ 10 ࿑ ᧲ᶏ࿾ၞ⷏ㇱ(⼾ᯅ࡮⼾ᯅ᧲)ߩ࿾ਅ᳓╬ߩ᷹ⷰ⚿ᨐ(2008 ᐕ 2 ᦬㨪2008 ᐕ 4 ᦬)
Fig.10Observed groundwater levels and others at the Toyohashi andToyohashi-higashi observation sites from February 2008 toApril 2008.

㪄㩷㩷㪊㪍㪊㩷㩷㪄╙ 11 ࿑ ᧲ᶏ࿾ၞ⷏ㇱ(⼾ᯅ࡮⼾ᯅ᧲)ߩ௑ᢳߩ᷹ⷰ⚿ᨐ(2007 ᐕ 11 ᦬㨪2008ᐕ 1 ᦬)Fig.11
Observed tilts at the Toyohashi and Toyohashi-higashi
observation sites from November 2007 to January 2008.

╙ 12 ࿑ ᧲ᶏ࿾ၞ⷏ㇱ(⼾ᯅ࡮⼾ᯅ᧲)ߩ௑ᢳߩ᷹ⷰ⚿ᨐ(2008 ᐕ 2 ᦬㨪2008ᐕ 4 ᦬)
Fig.12
Observed tilts at the Toyohashi and Toyohashi –higashi
observation sites from February 2008 to April 2008.

╙ 13 ࿑ ᧲ᶏ࿾ၞ⷏ㇱ(⼾ᯅ)ߩᱡ╬ߩ᷹ⷰ⚿ᨐ(2007 ᐕ 11 ᦬㨪2008 ᐕ 1 ᦬)Fig.13Observed strain and others at the Toyohashi observation sitefrom November 2007 to January 2008.

╙ 14 ࿑ ᧲ᶏ࿾ၞ⷏ㇱ(⼾ᯅ)ߩᱡ╬ߩ᷹ⷰ⚿ᨐ(2008 ᐕ 2 ᦬㨪2008 ᐕ 4 ᦬)
Fig.14
Observed strain and others at the Toyohashi observation sitefrom February 2008 to April 2008.

㪄㩷㩷㪊㪍㪋㩷㩷㪄╙ 15 ࿑ ᧲ᶏ࿾ၞ⷏ㇱ(⼾ᯅ᧲)ߩᱡ╬ߩ᷹ⷰ⚿ᨐ(2007 ᐕ 11 ᦬㨪2008 ᐕ1 ᦬)
Fig.15Observed strain and others at the Toyohashi-higashi observationsite from November 2007 to January 2008.

╙ 16 ࿑ ᧲ᶏ࿾ၞ⷏ㇱ(⼾ᯅ᧲)ߩᱡ╬ߩ᷹ⷰ⚿ᨐ(2008 ᐕ 2 ᦬㨪2008 ᐕ 4 ᦬)
Fig.16
Observed strain and others at the Toyohashi-higashi observation
ite from February 2008 to April 2008.

╙ 17 ࿑ દ⼺ඨፉ᧲ㇱߩ࿾ਅ᳓╬ߩ᷹ⷰ⚿ᨐ(2007 ᐕ 11 ᦬㨪2008 ᐕ 1 ᦬)Fig.17
Observed groundwater levels and others in the eastern Izu
peninsula district from November 2007 to January 2008.

╙ 18 ࿑ દ⼺ඨፉ᧲ㇱߩ࿾ਅ᳓╬ߩ᷹ⷰ⚿ᨐ(2008 ᐕ 2 ᦬㨪2008 ᐕ 4 ᦬)
Fig.18Observed groundwater levels and others in the eastern Izu
peninsula district from February 2008 to April 2008.

㪄㩷㩷㪊㪍㪌㩷㩷㪄╙ 19 ࿑ 㑐᧲࿾ၞߩ࿾ਅ᳓╬ߩ᷹ⷰ⚿ᨐ(2007 ᐕ 11 ᦬㨪2008 ᐕ 1 ᦬)Fig.19Observed groundwater levels and others in the Kanto districtfrom November 2007 to January 2008.

╙ 20 ࿑ 㑐᧲࿾ၞߩ࿾ਅ᳓╬ߩ᷹ⷰ⚿ᨐ(2008 ᐕ 2 ᦬㨪2008 ᐕ 4 ᦬)
Fig.20Observed groundwater levels and others in the Kanto district
from February 2008 to April 2008.

╙ 21 ࿑ ᧲ᶏ࿾ၞਛㇱߩ࿾ਅ᳓╬ߩ᷹ⷰ⚿ᨐ(2006 ᐕ 5 ᦬㨪2008 ᐕ 4 ᦬)
Fig.21
Observed groundwater levels and others in the central Tokai
district from May 2006 to April 2008.

╙ 22 ࿑ ᧲ᶏ࿾ၞධㇱߩ࿾ਅ᳓╬ߩ᷹ⷰ⚿ᨐ(2006 ᐕ 5 ᦬㨪2008 ᐕ 4 ᦬)
Fig.22
Observed groundwater levels and others in the southern Tokai
district from May 2006 to April 2008.

㪄㩷㩷㪊㪍㪍㩷㩷㪄╙ 23 ࿑ ᧲ᶏ࿾ၞ⷏ㇱ(⼾ᯅ࡮⼾ᯅ᧲)ߩ࿾ਅ᳓╬ߩ᷹ⷰ⚿ᨐ(2006 ᐕ 5 ᦬㨪2008 ᐕ 4 ᦬)Fig.23
Observed groundwater levels and others at the Toyohashi andToyohashi-higashi observation sitesin the western Tokai district
from May 2006 to April 2008.

╙ 24 ࿑ ᧲ᶏ࿾ၞ⷏ㇱ(⼾ᯅ࡮⼾ᯅ᧲)ߩ௑ᢳߩ᷹ⷰ⚿ᨐ(2006 ᐕ 5 ᦬㨪2008ᐕ 4 ᦬)
Fig.24
Observed tilts at the Toyohashi and Toyohashi -higashi
Observation sites from May 2006 to April 2008.

╙ 25 ࿑ ᧲ᶏ࿾ၞ⷏ㇱ(⼾ᯅ)ߩᱡ╬ߩ᷹ⷰ⚿ᨐ(2006 ᐕ 5 ᦬㨪2008 ᐕ 4 ᦬)
Fig.25Observed strain and others at the Toyohashi observation sitefrom May 2006 to April 2008.

╙ 26 ࿑ ᧲ᶏ࿾ၞ⷏ㇱ(⼾ᯅ᧲)ߩᱡ╬ߩ᷹ⷰ⚿ᨐ(2006 ᐕ 5 ᦬㨪2008 ᐕ 4 ᦬)
Fig.26
Observed strain and others at the Toyohashi-higashi observationsite from May 2006 to April 2008.

㪄㩷㩷㪊㪍㪎㩷㩷㪄╙ 27 ࿑ દ⼺ඨፉ᧲ㇱߩ࿾ਅ᳓╬ߩ᷹ⷰ⚿ᨐ(2006 ᐕ 5 ᦬㨪2008 ᐕ 4 ᦬)
Fig.27
Observed groundwater levels and others in the eastern Izu
peninsula from May 2006 to April 2008.

╙ 28 ࿑ 㑐᧲࿾ၞߩ࿾ਅ᳓╬ߩ᷹ⷰ⚿ᨐ(2006 ᐕ 5 ᦬㨪2008 ᐕ 4 ᦬)
Fig.28Observed groundwater levels and others in the Kanto district
from May 2006 to April 2008.

╙ 29 ࿑ ᵿጟߦ߅ߌࠆᴉਅ╬ߩ᷹ⷰ⚿ᨐ(2006 ᐕ 5 ᦬㨪2008 ᐕ 4 ᦬)
Fig.29Observed subsidence data and others at the Hamaoka
observation well from May 2006 to April 2008.

╙ 30 ࿑ ដᎹߦ߅ߌࠆᴉਅ╬ߩ᷹ⷰ⚿ᨐ(2006 ᐕ 5 ᦬㨪2008 ᐕ 4 ᦬)
Fig.30Observed subsidence data and others at the Kakegawa
observation well from May 2006 to April 2008.

㪄㩷㩷㪊㪍㪏㩷㩷㪄