本研究有兩個研究目的,一為以原始之地下水位歷線分析法為基本架構,調整其抽水率斜率的設定方法,然後再應用調整後之地下水位歷線分析法推估屏東平原於西元2001、2002、2003年之地下水補注量、抽水量及流失量,並計算該年度之安全出水量;二為探討地下水位歷線分析法之特性、適用性及限制條件。 本研究應用調整後之地下水位歷線分析法推估屏東平原於西元2001、2002、2003年之補注量、抽水量及流失量,推估成果顯示三年之補注量分別為18.44、13.47、15.62億立方公尺;抽水量方面依次為13.05、12.98及12.28億立方公尺;三年之流失量部分,分別為5.17、2.61、2.14億立方公尺。另外在安全出水量計算中,三年之計算結果依序為13.27、10.86、13.48億立方公尺。此外,在針對該分析法的探討中,經本研究得到地下水位歷線分析法,對於在降雨量上豐、枯水期分明的區域,此分析法為一可以快速概估該區域補注量、抽水量的分析方法。且其整體推估結果可靠度高且具參考價值。並地下水位歷線分析法相當適用於無詳細抽水資料地區之地下水補注量的推估。
The main two objectives of reconnaissance Estimation of Groundwater Recharge and Exploitation using Groundwater Hydrograph Analysis method for Pingtung Plain, Taiwan, can be summarized as: The first objective is to adjust the method to set up of the slope of exploitation rate in term of the primitive Groundwater-Hydrograph Analysis. From the adjusted Groundwater-Hydrograph Analysis to estimate groundwater recharge, exploitation and groundwater loss are 1844 MM3, 1347 MM3, and 15.62 MM3 of the years 2001, 2002 and 2003 respectively for Pingtung Plain, Taiwan. The second objective is to investigate the characteristic, application and limited conditions using Groundwater -Hydrograph Analysis method. The results from the study show the groundwater recharge amounts of the years 2001, 2002 and 2003 are 1844 MM3, 1347 MM3and 1562 MM3 respectively. The groundwater exploitations of the years 2001, 2002 and 2003 are 1305 MM3, 1298 MM3 and 1228 MM3 respectively. The groundwater losses of the years 2001, 2002 and 2003 are 5.17 MM3, 2.61 MM3 and 2.14 MM3 respectively. The Groundwater Safe Yield of the years 2001, 2002 and 2003 are 13.27 MM3, 10.86 MM3 and 13.48 MM3 respectively. In addition, the Groundwater-Hydrograph Analysis method is easily used to estimate groundwater recharge and groundwater exploitation for the clearly demarcated area of wet and dry seasons. It is reliable for referenced value to easily estimate the result of groundwater recharge or exploitation. Furthermore, this method is quite suitable to estimate the area where have not detailed groundwater exploitation information.