以色格法描述淡水河系污染狀況之研究

Pollution in Danshuei River System as Illustrated by A Segmental Block Color Method

陳妙玲(Miao-Ling Chen)

指導教授 ： 白書禎

國立臺灣大學/理學院/海洋研究所/碩士(2005年)

https://doi.org/10.6342/NTU.2005.10334

摘要

本研究建立一個可同時提供地理位置及測值濃度多項資訊的色格圖展示法，綜觀描述淡水河水質污染情形。所使用的資料來自環保署淡水河系河川水質2001年度監測計畫，該計畫在3大支流設有32個測站，經重整劃分成66個河段，在Excel試算表上依地理分布之相關位置設定色格，選定每季10個測項，分別將數據填入格中，再依濃度範圍標以顏色，如此可突顯淡水河系各測項的異常分布情形。由2001年度資料所畫的四季色格圖譜，可發現異常分佈河段通常為：新店溪，秀朗橋到華江橋之間；大漢溪，三鶯橋與浮州橋之間；基隆河，暖江橋到成美大橋之間。此種污染分佈趨勢幾無季節差別。三條支流會合後，各污染指標逐漸恢復正常，乃是因為受河口潮汐沖刷與海水稀釋之故。本文所建議的色格法將許多不同的資訊同時展現，使觀者得以快速進行數據之研判，更能貼切的描述河川水質污染狀況。用色格法表示的圖譜也適合製作成網頁，供一般產官學界人士及民眾參考。

關鍵字

色格法

並列摘要

A segmental block color method has been proposed for displaying pollution conditions in the Danshuei River System, which provides the geographic location and other information simultaneously on a diagram. Data used in this work was taken from a monitoring report for the Environmental Protection Agency. A total of 32 station’s along the three major branches were re-arranged into 66 sections, and data were filled into the MS Excel worksheet according to their corresponding positions. The cell block was colored in different hue levels in order to signify its concentration range. The results for the 4 seasons plotting show that the major polluting river sections are : Hsingdien River, between Shulong and Huajiang Bridges; Dahan River, between Sanyin and Fuchao Bridges; Keelung River, between Neonjiang and Chenmei Bridges. Seasonal variations have been found but can not be identified without considering the river flux and rainfall. After merging with the three branches, the water quality in the main Danshuei River was found gradually back to normal, probably due to the dilution of seawater from the Taiwan Strait. The method has clearly illustrated many information on the same worksheet, thus facilitates readers to understand quickly the general status of pollution. The type of presentation as proposed in this work may be recommended for the public uses through an internet homepage.

並列關鍵字

Segmental Block Color Method

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