无机型城市景观水体表观污染的悬浮颗粒物粒度分布特征:以中国运河苏州段为例

发布时间：2018-03-06 18:29

  本文选题：悬浮颗粒物　切入点：城市景观水体　出处：《环境科学》2016年12期 　论文类型：期刊论文

【摘要】：基于悬浮颗粒物粒度分布特性能为水环境表观质量研究提供重要信息,以流经苏州市市内运河水为研究对象,探讨无机型城市景观水体中不同表观污染程度下水中悬浮颗粒物的粒度分布特性及其影响因素,从悬浮颗粒物的粒径角度来解释无机型景观水体表观污染机制.结果表明,无机型水中悬浮颗粒物以单峰分布为主,中值粒径范围13~25.2μm,组分Ⅱ(粒级3.8~16μm)是优势组分,体积分数范围29.4%~59.6%;水体表观污染的敏感组分为组分Ⅱ(粒级3.8~16μm)和组分Ⅳ(粒级32~64μm),表观污染指数(SPI)与组分Ⅱ和组分Ⅳ体积分数关系具有分段性,分段节点是浊度为45NTU处,浊度小于45NTU时,SPI值与组分Ⅱ体积分数呈显著正相关,与组分Ⅳ体积分数呈显著负相关;当浊度大于或等于45NTU时关系相反.影响苏州运河水粒径分布的因素主要是生物因子和水动力条件,生物因子的作用主要表现为藻类的增加,水动力条件的作用是使水体发生再悬浮,导致水中大颗粒物质的增加.
[Abstract]:Based on the particle size distribution characteristics of suspended particles, it can provide important information for the study of apparent quality of water environment, and take the water flowing through the canal in Suzhou as the research object. The particle size distribution characteristics and influencing factors of suspended particulate matter in urban landscape water with different apparent pollution degree were discussed. The apparent pollution mechanism of landscape water body without model was explained from the angle of particle size. The distribution of suspended particulates in non-aircraft type water was dominated by single peak, the median particle size was 130.25.2 渭 m, and component 鈪，

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