ALOS/PALSARデータを用いたInSAR時系列解析によるスマラン（インドネシア）の地盤沈下

• 有本 美加

  京都大学防災研究所

• 福島 洋

  京都大学防災研究所

• 橋本 学

  京都大学防災研究所

• 高田 陽一郎

  京都大学防災研究所

書誌事項

タイトル別名

• Land Subsidence in Semarang, Indonesia, Observed by InSAR Time-Series Analysis Using ALOS/PALSAR Data
• ALOS/PALSAR データ オ モチイタ InSAR ジケイレツ カイセキ ニ ヨル スマラン(インドネシア)ノ ジバン チンカ

抄録

In order to precisely measure the land subsidence in Semarang, Indonesia, we performed a smallbaseline interferometric synthetic aperture radar (SAR) time-series analysis using the images acquired by the Japanese Advanced Land Observing Satellite (ALOS). We used a total of 34 SAR images, acquired from both the ascending and descending orbits, and obtained the subsidence timeseries in the two line-of-sight (LOS) directions. Before solving for the displacement time-series, we corrected for artifacts due to orbital inaccuracies and atmospheric phase delay. We obtained the time-series of quasi-vertical displacements by decomposing the displacement time-series in the two LOS directions. The result shows that the subsidence is limited on low-land areas where an aquifer system is well developed, suggesting that the cause of the subsidence is extraction of water from the aquifer. The subsidence rate was estimated to be practically constant with time with no clear seasonal effects. The maximum subsidence rate of 10±0.4 cm/year was obtained at a location where subsidence had not been identified before. Our study also shows the effectiveness of L-band SAR data to monitor land subsidence over time.

収録刊行物

• 測地学会誌

  測地学会誌 59 (2), 45-56, 2013

  日本測地学会

詳細情報

• CRID: 1390282679044012288
• NII論文ID: 10031190166
• NII書誌ID: AN00134900
• DOI: 10.11366/sokuchi.59.45
• ISSN: 2185517X
• ISSN: 00380830
• NDL書誌ID: 024839392
• Web Site: http://id.ndl.go.jp/bib/024839392
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I024839392
• 本文言語コード: ja
• データソース種別:
  • JaLC
  • NDL
  • CiNii Articles
  • KAKEN
• 抄録ライセンスフラグ: 使用不可