應用標準化地下水位指數法評估地下水資源開發區位－以嘉南平原為例

Evaluation on Potential Sites and Amount of Groundwater Exploitation for Chianan Plain using Standardized Groundwater Index

林宏奕(Hung-I Lin) ； 龔文瑞(Wen-Jui Kung) ； 張翔喻(Hsiang-Yu Chang) ； 李振誥(Cheng-Haw Lee) ； 高富員(Fu-Yuan Kao)

《農業工程學報》 66卷4期 (2020/12) Pp. 78-94

https://doi.org/10.29974/JTAE.202012_66(4).0007

摘要

本研究選定嘉南地區進行集水區尺度地下水資源評估，將觀測井地下水位以標準化地下水指數法（SGI）進行計算，根據不同累積時間的SGI值，依其發生強度篩選訊號出現年份，並計算不同SGI均線，以各均線間距離的差值，建立測站開發適宜性順序。最後以地下水管制區、地層下陷區與人為開發嚴重影響區為限制條件，將限制條件之圖層與觀測井開發適宜性順序套疊，獲取地下水適宜開發區位。適合地下水開發區域之篩選結果，顯示以鹽水溪流域為界，鹽水溪（含）以北為北段，穩定開發測站排序依次為十份、北門、後港、永康、錦湖、平溪、柳營、龍昌、新化；鹽水溪以南為南段包括成功、仁和、省躬、岡山、楠梓、五林、大社。綜合考慮限制條件因素下，柳營站與永康站則為本研究地下水適合開發區位。

關鍵字

標準化地下水位指數 ； 地下水位管理標準線 ； 地下水開發區位

並列摘要

The standardized groundwater level indexes, SGI, of 180 and 360 days groundwater level were applied in this project to analysis the fluctuation of historical groundwater level. The results showed that the variation of each station is different that must be converted to unified standards. The cumulate probability of standardized groundwater level indexes help to transfer the historical results into groundwater drought index, GDI, that the range from 0 to 1. And the GDI of a region was decided by the median of all groundwater stations. Finally, a suggested standard of classification was provided in order to help manage in a groundwater ward. On the other side, standardized groundwater level indexes, SGI, could help to compare the groundwater level between different years that were chosen to calculate groundwater management level. The results showed the average annual groundwater level in droughty years with different probabilities and become an elementary criterions of groundwater level. This research reveals that the screening results of the regions suitable for groundwater development are related to the development time. The areas classified as area 1 for development projects are located in Yongkang and Liuying monitoring stations.

並列關鍵字

Standardized groundwater index ； Standardized management line of groundwater level ； Groundwater exploitation area