Comments on the water quality classification of water bodies

ABSTRACT The classification of water bodies according to designated uses is a tool present in the 9.433/97 federal law and has being applied in several Brazilian hydrographic basins. Due to its relatively recent application, there are many doubts about the details of its implementation. The paper suggests a methodology that is being used by the authors, comprising the steps foreseen in Conselho Nacional de Recursos Hídrico’s (CNRH) Resolution nº 91/08. Although it is not a definitive methodology, it aims to contribute to the debate about the use of this relevant management tool of water resources.

摘要 依据指定用途开展水体分类，是巴西第9.433/97号联邦法律确立的管理工具，目前已在巴西多个水文流域得到推广应用。由于该应用模式问世时间尚短，其具体实施细节尚存诸多待解疑问。本文提出了一套作者团队正在实践的水体分类方法，该方法严格遵循巴西国家水资源委员会（Conselho Nacional de Recursos Hídricos，CNRH）第91/08号决议所预设的实施步骤。尽管该方法并非定论性的标准方案，但其旨在为围绕这一重要水资源管理工具的应用讨论提供有益参考。