- 作者: 陳鎮東; 洪佳章
- 作者服務機構: 國立中山大學海洋地質研究所
- 中文摘要: 由1985年12月開始,本研究利用十座自動集雨器,收集臺灣西南工業化地區之乾降及雨水。乾季所收集之雨水中常含有大量可能由水泥廠釋放之碳酸鈣等鹼性物質,使得雨水呈現鹼性。雨季時雨水則經常呈酸性,最低時PH為3.823。 臺灣地區超過60個湖沼及水庫也曾加以研究。於火成岩地區之湖水總鹼度甚低,於西部沈積岩地區總鹼度甚高,於東部變質岩地區則湖水總鹼度變化甚大。無當地污染源之高山湖泊,如雙連埤,翠峰湖及玉山國家公園內之天池已經屬於酸化敏感湖沼(PH小於6.3至6.7,導電度小於30至 40us/cm,鹼度小於300geq/l)。埔里鯉魚潭,花蓮鯉魚潭,宜蘭梅花湖,新竹鴛鴦湖,蘭嶼天池以及墾丁國家公園內之南仁湖區可能很快會轉變成酸化敏感湖泊。低海拔湖泊一般來講pH及總鹼度較高,除與土壤,岩石之分佈有關外,亦有可能因農藥,肥料之流入,造成人為優養化。這些湖泊短期內不太可能酸化。
- 英文摘要: Ten automatic samplers were used to collect dry deposits and rain water in the highly industrializedregion of southwestern Taiwan since December 1985. During the dry season, whatever rain that falls fre-quently appears basic because it contains a large amount of basic minerals such as calcium carbonatereleased by several cement plants. During the wet season, however, the rain becomes increasingly acidicwith the lowest pH value being 3.823. Over sixty lakes all over Taiwan have been sampled. The results show that lake alkalinity is low inregions of igneous rocks but high for the sedimentary zone in western Taiwan, and variable for the easternregion with metamorphic rocks. The high-mountain lakes without local pollution, Shuang Lian Pyi andTsuey Feng Hu in Yilan County and Tian Chyr within the Yusan National Park, are acid-sensitive ones (witha pH of less than 6.3-6.7, a conductivity of less than 30-40 us/cm, and an alkalinity of less than 300 ueq/1).The Li Yu Tan at Puli, Li Yu Tan in Hualian County, Mei Hua Hu in Yilan County, Yuan Yang Hu inHsinchu County, Tian Chyr on the Lanyu Island and the Nan Jen Hu Group within the Kenting NationalPark could soon become acid-sensitive lakes. In general, low-elevation lakes are high in pH and alkalinity,which are related to the soil and rock type or man-made eutrophication from the inputs of fertilizers,pesticides and other agriculture chemicals. These lakes are not likely to be acidified in the near future.
- 中文關鍵字: acid rain; lake acidification; water pollution; pH; alkalinity
- 英文關鍵字: --