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在广州城市快速路代表性路段选择3个监测点开展路面径流监测.结果表明,广州城市快速路路面径流悬浮固体、化学需氧量和石油类等污染物浓度较高,氮、磷营养盐浓度较低;不同监测点路面径流污染浓度差异较大,主要受降雨特征、日交通量和道路周边土地利用等因素的影响.路面径流中的石油类、化学需氧量、五日化学需氧量、总氮、总磷、铅和锌等污柒物已超过我国地表水环境质量标准Ⅲ类标准限值,若不经处理直接排入地表水,则可能造成受纳水体的水质污染.城市快速路道路旁径流排水口附近的土壤已明显受路面径流污染的影响,表层土壤有碱化、养分含量增加和重金属积累的趋势,路面径流污染给道路沿线土壤带来潜在的土壤理化性质不平衡和重金属污染的威胁. 相似文献
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《南阳师范学院学报》2015,(9):45-48
漯河某医院废水具有水量水质变化大,氮磷含量较高,且排放无规律的特点,采用"特殊废水预处理+巴登福(Bardenpho)同步脱氮除磷二级强化处理工艺+二氧化氯消毒处理"组合工艺处理该废水取得了较好的效果.处理工程规模1000m3/d,进水水质平均浓度为COD 83.3mg/L、BOD528.6mg/L、SS 67mg/L,处理后的出水平均浓度为COD 17.9mg/L、BOD54.89mg/L、SS 9mg/L,平均去除率分别为78.5%、82.9%、86.6%,出水水质达到《医疗机构水污染物排放标准》GB18466-2005中的预处理标准. 相似文献
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肖小龙 《中国石油大学胜利学院学报》2010,24(2):8-10
介绍了低渗透油田寨科污水站的污水处理工艺、主要设备工艺参数及工艺技术特点等,分析了主要工艺的技术原理和应用实践,说明了压力沉降工艺深化改进后与改性悬挂挤压纤维束过滤器组合能达到较高的工艺水平,可以提高精细处理后的水质,同时造价较低,运行成本低.通过该工程实例阐述了强化顸处理工艺及沉降工艺在油田精细水处理中的重要作用.指出预处理及沉降工艺的改进技术研究将是降低成本、提高水质标准、解决低渗透油田污水精细处理的重要技术发展方向. 相似文献
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华南地区城市道路径流污染特性:以深圳市为例(英文) 总被引:1,自引:0,他引:1
为了解析华南地区道路径流污染特性及其影响因素,对华南地区典型城市深圳市道路进行了4场降雨的径流样品采集及分析.结果显示道路径流水质劣于地表水4类环境质量标准,说明道路径流已经成为影响城市水环境质量的重要威胁.同时研究发现初期冲刷效应受到降雨类型和污染物种类的双重影响,因此在针对道路径流处理设施特别是初雨截流装置的设计时,需要同时考虑降雨类型与污染物种类.另外,建议华南地区的初雨截流量为3~5 mm的初期降雨.这些研究结果能为有效的道路径流处理设施设计提供有用的建议. 相似文献
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根据连续10个月的现场动态模拟实验的基础上,提出两套净水处理工艺.通过净水处理工艺性能、沉淀池排放污泥处理系统的经济技术分析比较,确定处理工艺.并倡导水资源匮乏地区优先选用该处理工艺.目前此工程正在施工. 相似文献
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根据玉米糖废水的水质特点 ,选择厌氧—好氧主体工艺处理玉米糖废水 .运行结果表明 :在进水水质为CODCr≤ 10 15 1mg/L时 ,出水水质达到GB8979— 1996《污水综合排放标准》二级标准 .该处理工艺耐冲击负荷能力强 ,运行稳定 ,操作简单 ,基建和运行费用较低 .可推广应用于食品行业高浓度有机废水的处理 相似文献
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一、活动目标: 1.通过活动增进学生对古运河历史和现状的了解,明白城离不开河,河也离不开城,古城运河两相依。2.欣赏古运河风光带美景,了解古运河周边环境现状,明确环保重要性, 增强环保意识。3.培养学生收集、处理信息的能力和团结协作的精神。二、活动准备: (1)从学校图书室或少儿图书馆借阅一些有关古运河历史的资料,如《老 相似文献
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The Huai River Basin is a unique area in P. R. China with the highest densities of population and water projects. It is also subject to the most serious water pollution. We proposed a distributional SWAT (Soil and Water Assessment Tool) model coupled with a water quality-quantity balance model to evaluate dam impacts on river flow regimes and water quality in the middle and upper reaches of the Huai River Basin. We calibrated and validated the SWAT model with data from 29 selected cross-sections in four typical years (1971, 1981, 1991 and 1999) and used scenario analysis to compensate for the unavailability of historical data regarding uninterrupted river flows before dam and floodgate construction, a problem of prediction for ungauged basins. The results indicate that dam and floodgate operations tended to reduce runoff, decrease peak value and shift peaking time. The contribution of water projects to river water quality deterioration in the concerned river system was between 0 to 40%, while pollutant discharge contributed to 60% to 100% of the water pollution. Pollution control should therefore be the key to the water quality rehabilitation in the Huai River Basin. 相似文献
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提出了一套基于低影响开发理念的城市雨水综合管理规划方案.与传统排水规划不同,该方案通过在社区尺度上规划各类低影响开发设施,削减径流总量和污染负荷,实现可持续的城市雨水综合管理.采用结合了传统排水管道和低影响开发设施的水力模型,对规划效果进行了评价.通过20年降雨数据的连续模拟发现,在规划完全实施基础上,相对于不采用低影响开发设施,径流总量削减率可达80%以上.为保障和指导规划的实施,结合当地条件,制定了技术实施导则.规划区域内3条主干道道旁生物滞留设施已完成施工建设,区域内其他地块的开发也正在实施导则的指导下逐步开展和实施.提出的基于低影响开发理念的区域雨水综合管理规划、评价和实施方法,将为我国其他地区的类似项目提供经验和借鉴. 相似文献
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长江三峡工程蓄水运行后,来自长江上游的泥沙滞留于库区,清水下泄,出库泥沙量明显减少,坝下河床受到冲刷,支流湖泊的供沙也将发生变化,使得进入长江中游河段的泥沙有所减少。本文对长江中游干流河段螺山水文站的径流及来水来沙等水文特性影响进行研究,对于该地区乃至下游地区的防洪调度、港口修建、航道整治与维护、滩涂围垦、工农业生产及生态环境保护等,都具有十分重要的指导意义。 相似文献
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Analysis of a rainwater harvesting system for domestic water supply in Zhoushan, China 总被引:1,自引:0,他引:1
The domestic rainwater harvesting system (DRHS) is an water demands. A computer model has been generated to analyze the important freshwater source for Zhoushan, China to meet performance of the DRHS with different ratios of D/(AR) (water demand/average annual collected runoff) and S/(AR) (storage capacity/average annual collected runoff). The performance of the DRHS was analyzed by means of the model simulation, which is described by its water shortage rate (WSR) and water loss rate (WLR). Using the data, a set of dimensionless design calculation chart is introduced. When the water demand and requirement of the design are known, the established chart can be used to easily determine the storage capacity and catchment (roof and other surface) area required to achieve a desired performance level. 相似文献
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南水北调中线工程水源区主要在十堰市,其水源区水质和水量基本达到调水要求,但水土流失、水体污染、移民安置、贫困与落后等问题影响工程效益,因此要保证"一库清水向北流",关键是确保水源区水资源环境保护与可持续发展.针对十堰市的水资源环境情况,论述水资源环境与可持续发展的相关性,分析水资源环境存在主要问题的原因,提出了水资源环境与可持续发展对策. 相似文献
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针对关中地区水环境存在的几个问题,即:地表水中渭河水质污染逐年加重,河道径流量逐年减少,下游泥沙淤积日趋加重;潜水层污染严重及地下水过量开采导致一系列环境地质问题;区域内城市缺水问题严重,农村用水供需矛盾加剧及渭河主干道生态缺水等。结合区域水环境承载能力的定量分析,测算出流域内各行政区的水环境承载能力,提出西安属于无开发余地的超载区,其它地区皆为可开发地区。开发余地大小依次为宝鸡、渭南、咸阳、铜川,同提出了区域调水、节约用水、加强管理和重视研究等治理对策。 相似文献
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为了探讨雨水水质对雨水利用工程的影响,以沈阳市浑南新区的雨水水质为研究对象,对单体建筑屋面、小区径流及市政排出口的雨水进行为期一年的检测与分析.研究结果表明,影响雨水水质的主要污染物是COD和SS,特别是在降雨初期比较明显,随着降雨时间的延续,水质逐渐好转.市政排出口雨水COD和SS的含量最高,变化范围分别为167~249,119~332 mg/L,小区径流雨水COD和SS的变化范围分别为27~85和106~269 mg/L,建筑屋面雨水COD和SS的变化范围分别为15~80和50~153 mg/L.3个取样点的氨氮含量分别为1.7~5.2,3.7~18.2和5.2~25.6 mg/L. 相似文献
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Australia is one of the world leaders in water management. The country meets the challenge of water shortage with established integrated water management in which rainwater is taken as a too precious resource to be just drained off. In Australia, rainwater is extensively harvested and polished to provide cheaper supply for potable and non-potable domestic uses, irrigation, landscaping, refilling aquifers and other uses. Implementing dual management over the quantity and quality of storm water and practicing water sensitive urban design (WSUD) in urban areas effectively control non-point-source pollution of waterways by pollutants carried with runoffs, reduce the discharge of rainwater and thus protect properties and lives from damage by floods. These achievements are attributed to constant reinforcement by govenments from federal to local levels in policy, financial, legal and educational aspects, and also to the lasting efforts of professional communities and water industry in developing requisite techniques, demonstrating the benefits and fostering public credence of rainwater reuse. The successful rainwater management practices in Australia suggest rainwater harvesting can be a complimentary means for the South-to-North Water Transfer Scheme to solve the water shortage in China's northern regions, and thus release to a degree the pressure on the Yangtze water resources. Best management practices of rainwater can be an effective controlling strategy for flooding and non-point-source water pollution of waterways. Such in-site source control initiatives have particular significance to protecting slow waterways of weak selfpurification ability, like the Three Gorges Reservior. 相似文献