@phdthesis{oai:nagoya.repo.nii.ac.jp:00010716,
 author = {佐藤, 健 and Sato, Takeshi},
 month = {Mar},
 note = {The Nobi alluvial plain is situated in the central part of Japan and has about 1300 k㎡ in area. The results of the leveling survey showed that the ground level of this plain had settled more than 1.4m during the period from 1961 to 1977 in the severely settled area. This land subsidence is result of lowering of the piezometric levels of groundwater in the 1st, 2nd, 3rd confined aquifers within the Quaternary sediments due to the withdrawal of groundwater. The purpose of this present paper is to contribute the solution of land subsidence problems in this plain and the following three subjects were mainly considered.  First allowable groundwater levels for preventing land subsidence were studied with one-dimensional finite element models of the Quaternary sediments at several sinking sites. This study showed that the groundwater levels must be recovered to about 10m below the ground surface to stop the settlement although they had lowered to about 30m below the ground surface in the severely settled area.  Secondly allowable yield for making the piezometric levels  of groundwater recovered to the desirable levels was studied with a three-dimentional finite element model of the Nobi groundwater basin. The author's model covers almost the Nobi plain and contains the compressible Holocene and pleistocene sediments including three main confined aquifers. This groundwater basin model was calibrated by simulating the groundwater condition during the period of 1961 to 1977ï½¥Subsequently to this calibration the predictive simulations performed for several future withdrawal plans. This simulation shows that the allowable yield of groundwater out of the Nobi plain must be about a half of the withdrawal in 1977.  Thirdly the prediction of land subsidence for several future plans of groundwater withdrawal was studied using the one-dlmensional finite element models for consolidation settlement together with the three-dimensional model for groundwater movement. Result of this study indicates that the land subsidence will still continue at the rate of several centimeters per year for about 10 years if the present rate of withdrawal is kept in future., 名古屋大学博士学位論文 学位の種類:工学博士(課程) 学位授与年月日:昭和56年3月25日},
 school = {名古屋大学, Nagoya University},
 title = {濃尾平野の地下水状態と地盤沈下に関する研究},
 year = {1981}
}