書誌事項
- タイトル別名
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- A Method for Requiring Permissive Critical Groundwater Head (Permissive Yield) to Prevent Land Subsidence
- 地盤沈下を阻止するための許容限界水頭(揚水量)の求め方--地盤沈下観測井を用いて
- ジバン チンカ オ ソシスル タメ ノ キョヨウ ゲンカイ スイトウ ヨウスイ
- 地盤沈下観測井を用いて
- Using the Recorded Data from Observation Well
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Fig. 3 shows the relation between groundwater head H and cumulative compaction s which were recorded by the Matsubara observation well set in Hiratsuka City, Kanagawa Prefecture. The relation between H and s can be read as a stress-strain curve (MIYABE, 1972). The following three patterns have been distinguished from H-s curve (Research Group for Water Balance, SHIBASAKI 1975). I: compaction stage with declining groundwater head II: rebounding or stopping compaction stage with rising groundwater head III: compaction stage with stable groundwater head (residual compaction stage) We consider that if residual compaction rate ds/dt (mm/month) is nearly zero at the third patern stage, it is possible to prevent land subsidence at field site. As shown in Fig. 3, each ds/dt corre sponding to mean stable groundwater head Hm can be required. Fig. 4 shows the liner relation of these values of Hm and ds/dt that are plotted on logarithm graph. We can see groundwater head of 35.2 m below the ground surface corresponding to negligible residual compaction rate of 0.1 mm/month. The groundwater head obtained by the mentioned method is persumed as the permissive critical groundwater head for the prevention of land subsidence. Closed relation is also observed between puming yield Q from the whole basin and groundwater head H at the Matsubara station, and the fluctuation of groundwater head is directly affected by pumping yield. We can read off Fig. 7-(b) permissive yield of 100,000 m^3/day corresponding to permissive groundwater head of 35.2 m.
収録刊行物
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- 地球科学
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地球科学 33 (2), 109-114, 1979
地学団体研究会
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詳細情報 詳細情報について
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- CRID
- 1390282679242351616
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- NII論文ID
- 110007091580
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- NII書誌ID
- AN00141269
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- ISSN
- 21897212
- 03666611
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- NDL書誌ID
- 2045574
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- 本文言語コード
- ja
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- データソース種別
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- JaLC
- NDL
- CiNii Articles
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- 抄録ライセンスフラグ
- 使用不可