【摘 要】
：
The Pearl River Delta (PRD) is one of the most developed and densely populated regions in China. Quantifying the amount of pathogens in the source of drinking w
【机 构】
：
College of Geography and Environmental Sciences, Zhejiang Normal University, Jinhua 321004, China;Cr
论文部分内容阅读
The Pearl River Delta (PRD) is one of the most developed and densely populated regions in China. Quantifying the amount of pathogens in the source of drinking water is important for improving water quality. We collected water samples from six major water storage reservoirs in the PRD region in both wet and dry seasons in 2006. Results showed that extal environmental factors, such as precipitation, location, as well as the intal environmental factors, i.e., physicochemical properties of the water, were closely related with the distribution of coliforms. Seasonally, the coliform bacterial concentrations in wet season were one to two orders of magnitude greater than those in dry season. Spatially, coliform bacterial levels in reservoirs near urban and industrial areas were significantly higher (p < 0.05) than those in remote areas. Correlation analyses showed that the levels of coliforms had close relationships with pH,temperature, suspended solid, organic and inorganic nutrients in water. Principal components analysis further demonstrated that total coliforms in the reservoirs were closely related with water physicochemical properties, while fecal coliforms were more associated with extal input brought in by seasonal runoff.
其他文献
该文从挂篮荷载计算、施工流程、支座及临时固结施工、挂篮安装及试验、合拢段施工、模板制作安装、钢筋安装、混凝土的浇筑及养生、测量监控等方面人手,介绍了S226海滨大桥
改革开放以来，随着人口流动政策的逐渐松动，我国农村人口开始大规模自发地向城镇流动。据统计，2005年进城务工劳动力达到1.25亿人，占全国农村劳动力的比例达1/4之多。广大进城务工人员，为务工地城市做出了贡献，为推动社会发展提供了强有力的经济支撑；同时，这些人所创造的价值也带回家乡，给家乡的经济发展以有力的支撑。进城务工人员的工作、生活情况越来越受到社会各界的关注和重视。如何使他们真正融入城市生活
在生物教学中可借助数学工具、数学思想来解析生命活动中的某些现象和规律。本文通过对坐标曲线的运用，分析在不同氧气浓度下CO2的释放量与O2的吸收量间的数值关系，直观体现出
以‘济麦20’为供试材料,通过田间试验,在拔节期和开花期设置土壤相对含水量为65%(W_(65))、70%(W_(70))和75%(W_(75))的测墒补灌处理,以全生育期不灌溉为对照(CK),研究不同
那个头发稀少的清洁工阿姨，我已经注意她很久了。 她常年穿那身蓝底小碎花的衣服，大概是工作服吧。她经常在我们上课的时候，在教室外的走廊上拖地。大概是为了不影响我们上课，她拖地的时候，总是把身子压得很低，因此，透过高高的窗台，我只是偶尔看到她弓起的背。有一次，我因为有事离开教室，我看到她靠在教室后门的墙壁上，一动不动的，好像是累了在休息，又好像是在听我们上课。那一节课，我们上的是英语课。 我经常在
In order to investigate the correlation between reactor performance and the microorganisms, an integrated A/O reactor was operated for 72 days to treat diluted
海南省澄迈县委、县政府坚持以科学发展观为指导,把反腐倡廉建设放在更加突出的位置,锐意改革,积极创新,深入扎实开展反腐倡廉工作,促
Chengmai County, Hainan Province, t
高校思想政治教育工作在培养创新复合人才方面起着不可替代的重大作用。本文梳理安徽省淮北师范大学学生思想政治教育创新工作状况，针对性地搭建学生思想政治教育创新路径：加强
泥塑艺术是我国古老的民间艺术。在人类发展的历史上,泥塑一直伴随着生活不断传承,以泥土为原料,从陶器皿、陶佛像,到儿童的玩具,从没有间断过。本篇论文以越剧《五女拜寿》
请下载后查看，本文暂不支持在线获取查看简介。
Please download to view, this article does not support online access to view profile.