日月潭水庫優養潛勢分析

Eutrophic Potential Analysis in Sun-Moon Lake Reservoir

10.29417/JCSWC.200103_32(1).0001

李漢鏗(Han-Keng Lee)；黃建源(Jian-Yuan Huang)；童智偉(Chih-Wei Tung)；葉怡巖(Yir-Yarn Yeh)

水庫 ； 優養化 ； 營養鹽 ； reservoir ； eutrophication ； nutrients

中華水土保持學報

32卷1期（2001 / 03 / 01）

1 - 8

繁體中文

本文以日月潭水庫歷年水質監測資料，配合集水區之土地利用，水庫水理參數與操作資料，推求日月潭水庫的氮與磷營養鹽負荷量，並評估水庫水質優養潛勢。分析結果顯示，日月潭水庫平均總磷負荷量約爲1.86 × 10^4kg/yr，總氮負荷量約爲9 × 10^5kg/yr；主要負荷源是來自霧社水庫越域引水。要有效改善日月潭水庫水質，需先進行霧社水庫的非點源污染的整治工作，減少排入日月潭水庫的氮磷營養鹽負荷量。水庫水質要回復到普養狀態，則應去除總磷量2.64 × 10^3kg/yr。

This paper estimated the loading of nutrient sources for evaluating the potential of eutrophication in Sun-Moon Lake Reservoir. Analysis results show that the total phosphorus and total nitrogen loading approximated 1.86×10^4 and 9×10^5 kg/yr, respectively. The predominant loading source comes from the trans-watershed diversion of Wu-She Reservoir. The strategies of water pollution control include straightening the non-point sources in Wu-She Reservoir and reducing the nutrient loading of nitrogen and phosphorus into Sun-Moon Lake Reservoir, thus improving the water quality. If the total phosphorus capacity falls to 2.64×10^3 kg/yr, the reservoir will restore its mesotrophic status.