被圧地下水の単位面積排水量と地盤沈下との関係

• 清水 欣一

  中国四国農政局

書誌事項

タイトル別名

• Relationship Between Unit Area Discharge of Artesian Groundwater and Land Subsidence

抄録

Unit area discharge of groundwater, Z (m³/day/km²) can be expressed by the following equation, <BR>Z=n/AQ<BR>where Q is the average discharge (l/sec) of well or spring, A is the area (km²) of the surrounding terrain having the same hydro-geologic condition at the well site. n/A is called the coefficient of well distribution or of spring distribution.<BR>This paper deals with the calculation of Z values for Tokai and Chugoku-Shikoku districts with the amount of free groundwater and with that of artesian groundwater. The Z values of artesian groundwater in those districts were plotted on the inter-section chart, Z-Q-n/A diagram, with reference to several well-known land subsidence area. On the diagram, the regression equation based on the method of least squares for 10 sites in the spring area is as follows:<BR>logZ=0.772logQ+2.357<BR>and that for 4 sites in the land subsidence area is<BR>logZ=0.890logQ+2.617<BR>The value of n/A in the land subsidence area was high as 2.5-4. This result suggests that the land subsidence might be due to the overdraft of artesian groundwater rather than that of free groundwater.

収録刊行物

• 応用地質

  応用地質 19 (1), 1-11, 1978

  一般社団法人 日本応用地質学会

キーワード

• General Medicine

詳細情報

• CRID: 1390282679071376384
• NII論文ID: 110003356231
• NII書誌ID: AN00026635
• DOI: 10.5110/jjseg.19.1
• ISSN: 18840973
• ISSN: 02867737
• 本文言語コード: ja
• データソース種別:
  • JaLC
  • Crossref
  • CiNii Articles
• 抄録ライセンスフラグ: 使用不可