應用水庫水質模式評估日月潭水庫污染源及水質變化趨勢分析

APPLICATION OF RESERVOIR WATER QUALITY MODEL TO EVALUATE THE POLLUTION SOURCE AND WATER QUALITY OF THE SUN MOON LAKE RESERVOIR

陳怡安(Yi-An Chen) ； 張嘉玲(Chia-Ling Chang)

《農業工程學報》 65卷3期 (2019/09) Pp. 1-10

https://doi.org/10.29974/JTAE.201909_65(3).0001

摘要

本研究區域為日月潭水庫，是台灣著名的觀光景點，其水庫功能主要是發電、觀光及供水，雖然日月潭地區的觀光業的興盛，可以為當地帶來極大的經濟效益，但是同時它也會影響到日月潭水庫的環境。本研究的目的為討論日月潭水庫的水質變化趨勢及污染源分析，並應用水庫水質模式簡易評估水庫水體之涵容能力，雖然目前的水庫水質尚未達到優養化的程度，但評估水庫水體尚能乘載的環境負荷能力是相當重要的。根據本研究結果顯示，由於日月潭水庫為離槽水庫，有約87％之污染是來自外部污染，但若扣除外部污染，主要之污染源為遊憩污染，約有六成。日月潭水庫水質近年來平均約12μg／L，距離甲類水體水質標準，水體尚可再乘載7,300kg／yr之入庫總磷污染量，而距離達到水庫優養化，尚可再乘載10,900kg／yr之入庫總磷污染量，依此分析結果可初步的得知日月潭水庫尚可承載的污染負荷量，以供作為水庫及集水區管理之參考依據。

關鍵字

水庫水質 ； 水庫管理 ； 水質模式

並列摘要

The study area is the Sun Moon Lake Reservoir, which is a famous sightseeing spot in Taiwan. The functions of the Sun Moon Lake Reservoir are power generation, sightseeing and water supply. The sightseeing development can bring economic benefit. However, it can also impact the environment. The objective of this study is to discuss the water quality trends, the pollution sources and the assimilative capacity of the Sun Moon Lake Reservoir. Although the present water quality of this reservoir has not been eutrophic, the assimilative capacity analysis is significant for reservoir management. The results show that about 60% of the pollution source of the reservoir comes from sightseeing. The average TP concentration of the reservoir is 12μg/L. The results indicate that the assimilative capacity is about 7,300kg/yr of TP load under the 1^(st) grade water quality standard, and about 10,900kg/yr of TP load under the high degree of eutrophication. The analysis results can be useful references for reservoir management. The analysis of this study can be used as an important reference for reservoir management.

並列關鍵字

Reservoir water quality ； Reservoir management ； Water quality model