共查询到20条相似文献,搜索用时 125 毫秒
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《中国环境管理干部学院学报》2016,(6)
正全国近五成黑臭水体已开工整治住房城乡建设部城市建设司副司长章林伟12日说,截至目前,全国295个地级及以上城市中,有220个城市排查确认黑臭水体2 026个,其中已开工整治的黑臭水体已近五成。章林伟在住建部、环境保护部、水利部、农业部4部委城市黑臭水体整治工作进展例行新闻发布会上说,在220个地级及以上城市中,累计有321个黑臭水体完成了整治工作,占总数的15.84%;已经开工整治的有641个,占总数的31.64%。已开工整治和完成整治工程的黑臭水体达962个,占总数的 相似文献
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城市河流近自然治理--概念构架与治理设计 总被引:6,自引:0,他引:6
河流是城市生态系统的重要组成部分,是城市的自然元素和景观组分,具有提供水生生物生境和水源、调节小气候、美化城市、休闲娱乐等多种生态服务功能.随着城市化进程的飞速发展,城市河流生态系统面临着生物多样性减少、污染加剧等多方面的危害.如何恢复受损的城市河流生态系统已经成为我们的当务之急.对城市河流的生态结构及其在城市中的生态功能进行了简要介绍,讨论了河流生态恢复的近自然方法,并对现有的河流生态恢复存在的问题及发展趋势提出了几点看法. 相似文献
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人工曝气生态净化系统治理黑臭河流的原理及应用 总被引:24,自引:0,他引:24
人工曝气生态净化系统是一种辅以曝气复氧的生态处理工艺。本文介绍了人工曝气生态净化系统的构造、净化机理及其在治理福州白马支河的成功应用。近一年来的运行结果表明,该系统对黑臭河流的净化效果好,同时还可实现污水的资源化,适合于城市景观河道的治理。 相似文献
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刘震 《中国环境管理干部学院学报》2014,(4):30-33
城市河流是城市的生命线,对于当地经济发展和居民身心健康均有不可替代的重要作用。通过分析我国城市河流污染的总体现状发现,我国城市河流治污面临着城市化进程、区域利益分化、职能部门能力缺失等困境,以此为前提,分别从树立正确的城市河流治污观念、设立流域综合管理机构、预防为主和防控结合、建立科学合理的城市河流生态系统修复模式几方面提出完善对策。 相似文献
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Pollution and Self-Cleansing of an Urban River in a Developing Country: A Case Study in Dar es Salaam, Tanzania 总被引:1,自引:0,他引:1
Pollution and self-purification trends of an urban river namely, Msimbazi River, in Dar es Salaam City, Tanzania, were investigated. Site investigations and water quality analyses were done. The river is polluted in terms of high organic and nutrient concentrations, low dissolved oxygen, and high counts of indicator organisms. Biochemical oxygen demand (BOD5) concentrations were 27– 340 mg/L. Dissolved oxygen was found to be as low as 0.9 mg O2/L. Bacteriological pollution increased with distance downstream of the river, a trend attributable to an increase in the catchment of pollution sources, which are on-site sanitation systems. Although the river has an appreciable self-purification capacity, the capacity is strained by persistent pollution overloads. The pollution plight of the river is attributable to its being flanked by expanding human habitats and vibrant industrial, institutional, and socio-economic activities. Provision for pretreatment of discharges into the river is put forward as a remedial measure for the observed pollution. Matching nontechnical and techno-social remedial measures are also recommended. These include sensitization of polluters on merits of environmental protection practices such as cleaner production and strict enforcement of environmental protection laws. 相似文献
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城市河流治理技术研究进展 总被引:1,自引:0,他引:1
城市河流水体具有生态系统复杂、污染类型齐全、污染源数量多、危害极为严重的特点。本文结合国内外最新研究成果和积累的宝贵经验,介绍了河道曝气技术、生态混凝土技术、阿科蔓复合生态技术、接触氧化技术、生态疏浚、化学强化一级处理、光催化技术等比较先进技术的研究进展,并对今后保护城市河流提出了建议。 相似文献
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原位修复是一种可靠、卓有成效的河道水体净化修复技术,具有治理费用低和最大程度降解污染的特点,适合于污染严重、流量较小的河流水体。本文概述了河道曝气法、生物接触氧化、河流湿地处理和生态浮床等河道原位处理技术的原理、发展及应用情况,其中河道曝气和生物接触氧化起步早,技术较为成熟,为早期污染水体治理贡献很大,相对河流湿地处理和人工浮床起步晚,但成本低,耗资少,处理效率又高,具有很大的发展空间。这些工艺都是经济、有效以及符合可持续发展要求的生物生态技术,在国内外发展比较迅速,但在进一步改进的前提下,其应用前景将十分广阔。 相似文献
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Arthur J. Morgan J. L. Thomas 《Journal of the American Water Resources Association》1973,9(5):884-891
ABSTRACT: There is a lamentable absence of comprehensive planning in the current cursade to improve water quality. A serious shortcoming is the lack of evaluation of the effects of waste water treatment upon environmental quality. At some point in time the public may ask what they have obtained for their money. The nature of pollution in a river basin demands a coordinated attack against it. Engineering and economic criteria suggest that a properly empowered river basin authority would be the logical organization to plan and operate a water quality management system. Several forms of such authorities have operated effectively and efficiently for many years in the United States and other industrialized countries. Examples of successful river basin authorities and their advantages and methods of operation are discussed. 相似文献