Slow-flow water bodies are important components for maintaining the ecological balance,but their mobility are small with weak self-purification ability.
缓流水体是维持生态平衡的重要组成部分，但由于自身流动性小，自净能力弱的特点正处于被忽视被破坏的状况。
参考来源 - 缓流水体污染修复技术及保护措施研究—《南水北调与水利科技》—2008年第3期—龙源期刊网·2,447,543篇论文数据，部分数据来源于NoteExpress
It is concluded that controlling the external pollution resource is the key factor to guarantee self-purification ability of river.
说明控制外源污染是河流保证自我修复能力的关键。
Water environment impact is related to the style and strength of the activities and with the water areas self-purification ability.
旅游活动对水环境的影响除了与活动方式、活动强度有关外，与水域面积、自净能力亦有显著的关系。
To improve the self-purification ability and pollution situation of river water, control the pollution load and ensure the river basic flow are two important ways.
在控制污染负荷排放的同时，也要保证河流基本流量，提高水体自净能力，改善渭河水体的污染现状。
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