台湾における農用地土壌汚染及び汚染拡大の実態 : 台湾の農用地土壌汚染の社会的背景及び対策制度の課題  [in Japanese] Expansion of Farmland Heavy Metal Contamination in Taiwan : Identification of societal background of the contamination and limits of existing countermeasures  [in Japanese]

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Abstract

本研究では,台湾における農用地土壌汚染の社会的背景と,汚染及び汚染拡大の分布特性を明らかにすると共に,汚染対策の課題を日本の農用地土壌汚染対策の取組との対比により明らかにした.台湾の農用地土壌汚染は都市計画農業区やその周辺地域に多く,農村地域にある違法操業を含む工場排水の農業用排水路への放流が主因である.台湾の農用地土壌汚染対策による汚染の除去は対症療法的であり,工場排水への対策や未処理の底質による汚染の拡散や蓄積の防止を考慮した対策は取られない.本稿では,このような事態への対応方策として,①現在の点的な対症療法的対策から日本の農用地土壌汚染対策のような面的かつ抜本的な対策への改善,②工場の立地規制や排水基準の見直し,違法操業の取り締まり,③都市計画区域外の農業区については圃場整備事業等を契機とした土地利用の整序,を提案した.

In this study, we clarified socio-economic background and geographical characteristics of the heavy metal contamination of farmland in Taiwan and identified limits of an existing institution to cope with contaminated farmland. Main cause of heavy metal contamination of farmland is ill-treated wastewater discharged by factories into agricultural canals, which contaminates water quality and sediments. Thus, the contaminated farmland can often be observed in urban and sub-urban areas. Such phenomena are linked to weak-enforceability of land use regulation and factory effluent standard. Also, decontamination method can only reduce contamination level of farmland without eliminating sources of heavy-metal contamination, causing gradual expansion of contaminated farmland. Finally, we proposed that, in order to cope with heavy metal contamination of farmland in Taiwan, 1) decontamination method should be improved so that it can deal with the contaminated sites and surrounding areas as a whole, 2) land use regulation and factory effluent standard should be improved both by tightening the control over illegal activity and by setting more stringent conditions to assure better water quality for agriculture, and 3) location of factories should be spatially, well-coordinated making best use of the opportunity of farmland consolidation projects.

Journal

  • Transactions of The Japanese Society of Irrigation, Drainage and Rural Engineering

    Transactions of The Japanese Society of Irrigation, Drainage and Rural Engineering 80(6), 489-498, 2012-12-25

    The Japanese Society of Irrigation, Drainage and Rural Engineering

References:  21

Codes

  • NII Article ID (NAID)
    10031171458
  • NII NACSIS-CAT ID (NCID)
    AA12240517
  • Text Lang
    JPN
  • Article Type
    ART
  • ISSN
    18822789
  • NDL Article ID
    024200979
  • NDL Call No.
    Z18-365
  • Data Source
    CJP  NDL  J-STAGE 
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