EPA-96-G102-02-200

097

6,891 千元

2007/11/20

2008/12/31

梁効文

土污基管會

吳佩洋

康城工程顧問股份有限公司

土壤及地下水

灌溉水監測, 重金屬, 預警系統

Irrigation water quality monitoring, Heavy metals, Early warning system

黃一鈺

梁効文

02-2784-9899

hwliang@camec.com.tw

本計畫執行期限自民國96年11月起至97年12月止，主要針對桃園、新竹、台中及彰化地區，彙整歷年農地土壤重金屬污染與調查之相關資料，據以遴選其中四條高污染灌溉渠道進行水質及農地土壤重金屬採樣及數據分析，進而探討灌溉水質與農地土壤重金屬污染之相關性，並提出預防農地土壤重金屬污染之預警機制及管理策略。根據本計畫取得之環保署水保處、各農田水利會及土基會列管資料；農田水利會之監視點水質檢驗資料彙整結果，確認45條高污染潛勢渠道，其中桃園15條，新竹2條，台中4條，彰化24條。經篩選其中4條高污染灌溉渠道，合計執行水質121點次、底泥121點次及土壤16點次採樣及分析，結果顯示：底泥重金屬污染狀況較為嚴重，超出標準比率為41.3%（50/121），農地土壤重金屬超出標準比率為18.8%（3/16），水質重金屬超出標準比率為13.2%（16/121），初步研判可能原因為放流水標準與灌溉水標準差距過大，容易造成搭排之工業廢水污染農地。本年度相關成果資料均已匯入GIS地理資訊系統，並依據四個農田水利會過去5年(92～96年)水質監視結果，篩選出複驗頻率高且複驗結果重金屬超出標準機率高之監視點，依據比率分布範圍中間值篩選結果，桃園篩得2監視點，台中1監視點，彰化6監視點，新竹則無相關結果。確認該監視點為高污染潛勢區後，依據監視點及相關渠道影響範圍，並比對歷年農地重金屬調查結果，建議後續針對以往土壤污染調查結果僅銅、鋅污染濃度為五級；其他重金屬為四級之區域進行進一步調查。

灌溉水監測, 重金屬, 預警系統

EPA-96-G102-02-200.pdf

55MB

[期末報告]公開完整版

2009/3/1 上午 12:00:00

This project was implemented over the period from November 2007 to December 2008. Using historical survey data and other data for heavy metal pollution of agricultural land in Taoyuan, Hsinchu, Taichung and Changhua, four heavily polluted irrigation channels were selected to be the targets of water quality and agricultural land soil heavy metal sampling and data analysis, in order to investigate the relationship between irrigation water quality and heavy metal pollution of agricultural land soil, and to put forward preventive measures and management strategies to combat the pollution of agricultural land by heavy metals. The data used in the study included data compiled by the Department of Water Quality Protection, Environmental Protection Administration, individual irrigation associations, and the Soil and Groundwater Pollution Remediation Fund. Collation of the data recorded by the irrigation associations’ water quality monitoring sites confirmed the existence of 45 highly polluted irrigation channels, of which 15 were located in Taoyuan, 2 in Hsinchu, 4 in Taichung, and 24 in Changhua. Four of these highly polluted channels were selected for further study. In all, water quality sampling was performed at 121 locations, sediment sampling was performed at 121 locations, and soil sampling was performed at 16 locations. The data analysis results showed that heavy metal pollution of sediment was most severe, with 50 out of 121 sampling sites (41.3% of the total) displaying heavy metal levels above the maximum acceptable level. For agricultural land the figure was 3 out of 16 sites (18.8%), and for water quality it was 16 out of 121 (13.2%). Preliminary analysis suggests that the main reason for this situation may be the excessive disparity between the water quality standards applying to effluent and those applying to irrigation water, resulting in pollution of agricultural land by industrial waste water. The data obtained during the past year have been integrated with a Geographical Information System (GIS). Using water quality monitoring data for the past five years (From 2003 to 2007) compiled by the four irrigation associations in question, it has been possible to identify those sampling sites where follow-up sampling has been performed and where follow-up sampling showed pollution levels that were still above acceptable levels. It is suggested that further surveys should be undertaken with respect to those districts where past soil pollution survey results have shown Level 5 pollution in the case of copper and zinc pollution, and Level 4 pollution in the case of other heavy metals.

Irrigation water quality monitoring, Heavy metals, Early warning system