頁籤選單縮合
| 題 名 | 礁溪溫泉之生成模式與水位水溫觀測=The Occurrence and Movement of Hot Spring Water in Jiaosi, Northeastern Taiwan |
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| 作 者 | 陳文福; 呂學諭; | 書刊名 | 經濟部中央地質調查所彙刊 |
| 卷 期 | 23 2010.12[民99.12] |
| 頁 次 | 頁109-135 |
| 分類號 | 354.3 |
| 關鍵詞 | 礁溪溫泉; 水位; 水溫; 監測 ; Jiaosi hot spring; Water level; Temperature; Monitoring; |
| 語 文 | 中文(Chinese) |
| 中文摘要 | 礁溪溫泉是臺灣重要的溫泉區之一,溫泉區日漸發展,溫泉旅館日漸增加,溫泉水資源的使用與管理,面臨極大的挑戰。前人研究指出本區溫泉已經超抽,並導致溫泉分布範圍縮小與溫度降低。然而,因缺乏長期水位與水溫的監測數據,本區溫泉的成因,是否已過度抽用?仍無法定論。本研究藉由井溫剖面的量測,水文地質鑽探資料綜合整理,提出一較具體的溫泉生成模式。並設立四個監測站,監測水位及水溫,以瞭解溫泉水資源的長期變化。 礁溪溫泉的來源為西側坡地下的四稜砂岩,熱水由砂岩裂隙上湧,進入上覆的沖積層後,向下游呈水平流動。熱水分布呈西北-東南長,東北-西南窄的長條形,軸長約1.5km,寬約1.0km。此沖積層在溫泉中上游厚度約20-100m,往東南變厚可達200m。由上往下約可分三層,上下以礫石層為主、中間夾中細砂層。 礁溪溫泉的主要用水層次為地面下20-50m深,此層之水位由西北往東南漸次降低。水位變動與降雨有明顯的相關,2008年9月降雨超過1,000mm,水位上升即達1-6m。沖積層的溫度上下兩層較冷,中段較熱,推測因中段為主要抽水層次,人為抽水致使熱水較快補充。此主要熱水層之水溫由西北往東南漸次降低,源頭約65℃、中游55℃、下游45℃。 2007年8月至2009年1月共一年半的監測,並沒有發現水位(一年期)或水溫降低;相反的,太子井及國小井的水溫都有微升,推測溫泉井大量的抽熱水,對淺部地層有加熱作用。 |
| 英文摘要 | The Jiaosi hot spring is one of the most important hot spring destinations in Taiwan. Studies showed that hot water had been extracted in excess of its recharging ability and over-pumping caused the hot water front to retreat and temperature declined. However, there is no long-term monitoring data to prove the time and magnitude of those overpumping events. For understanding the occurrence and movement of hot spring waters, we compile a conceptual hydrogeological model from driller’s logs and by measuring the temperature profile in wells. We also install probes in four wells to monitor the water levels and temperatures. The quartzite in the western hillside areas is the source of hot spring waters which flow upward along fractures and enter the horizontally unconsolidated sedimentary aquifer, then flow mainly to the southeast. There are three layers in the aquifer, with upper and lower layers composed of gravels and a sandy layer in the middle. The thickness of the aquifer is about 20-100 m in the northwestern upflow area and over 200 m in the downflow area. The hot waters are distributed over the aquifer with a surface area of about 1.5×1.0 km2. There is a significant correlation between water level rise and rainfall intensity. In September of 2008, the water levels in hot spring wells rose for several meters when the rainfalls were over 1,000 mm. The temperature of the middle layer is higher than the upper and lower layers that indicate the middle layer has been pumped intensely. According to our data, we suggest that there is no hot water front retreat or temperature decline in the monitoring period of one and half years. |
本系統中英文摘要資訊取自各篇刊載內容。