非穩態數值模擬估算彰化地層下陷區地下水安全出水量之研究

Unsteady State Simulation to Estimate Safety Yield for Underground Water Production in the Formation of Changhua Subsidence Area

林再興(Zsay-Shing Lin) ； 施凱閔(Kai-Ming Shih) ； 陳昶旭(Chang-Hsu Chen)

《鑛冶：中國鑛冶工程學會會刊》 46卷3期 (2002/09) Pp. 75-84

https://doi.org/10.30069/MM.200209_46(3).0005

摘要

本研究目的是估算彰化地層下陷區之安全出水量，評估計算使彰化地層下陷區低於零水位的面積（以85年12月為基準）在兩年內不再增加，五年內減少一半的條件下，每年所允許抽取的地下水之水量。根據本研究採用非穩態數值模擬，若要使得地層下陷區低於零水位面積在五年內減少一半的安全出水量約為4.58億噸，其中富水層一的安全出水量為每年0.38億噸；富水層二之一的安全出水量為每年2.66億噸；富水層二之二的安全出水量為每年1.04億噸；富水層三的安全出水量為每年0.50億噸。

關鍵字

數位模擬 ； 地層下陷 ； 安全出水量

並列摘要

The purpose of this study is to estimate safety yield in the formation of Changhua subsidence area by unsteady state simulation. Safety yield is defined as a maximum annual groundwater pumping rate that make the area of below-sea-level water head being not increase in two years, and will reduce to its half within five years. Based on unsteady sate numerical simulation, the safety yield estimated in this study is 0.458 billion tons per year for four aquifers in the Changhua area, including 0.038 billion tons per year for aquifer 1, 0.266 billion tons per year for aquifer 2-1, 0.104 billion tons per year for aquifer 2-2;, and 0.050 billion tons per year for aquifer 3.

並列關鍵字

Numerical simulation ； Subsidence area ； Safety yield