Chemical composition and its origin in spring rainwater over Taihu Lake

1 INTRODUCTION Rainfall chemical composition is mainly re- sulted from inner-cloud nucleation and under-cloud washing. The aerosol in cloud features regional scales. The concentration and chemical composition of under-cloud aerosol reflect in overall the …     

聊城市水功能区评价研究

水功能区限制纳污是实施最严格水资源管理制度中“三条红线”的核心内容之一,科学做好区域水功能区监测是做好水功能区限制纳污管理的主要措施.以山东聊城市为例对区域水功能区监测的基本思路、技术路线与评价方法,提出以水体污染折合水量表示的区域水功能区污染对当地地表水资源开发利用的影响,依据总量控制的有关制度计算核减水量.     

陶城铺灌区地下水体污染现状浅析及对策建议

水资源是经济社会发展的重要支撑和保障,水资源短缺、水污染严重已成为制约经济发展的关键因素.陶城铺灌区地下水的严重污染,已对地方经济的持续发展和人居环境的优化构成威胁.依法治理水污染,保护生态环境,对于实现水资源与经济、社会的协调发展,全面建设小康社会,具有重大的战略意义.     

鄱阳湖水质现状及变化趋势

根据鄱阳湖1990年监测资料,对水质污染现状进行分析,同时利用1981—1990年资料,分析了水质变化趋势。分析表明:湖体、河口水质均属较清洁水或尚清洁水。但是,随着入湖污染负荷量的增加,湖区水体污染呈上升趋势,宜引起有关部门高度重视。     

湿地治理富营养化的机理

2006年8月4日“湖泊保护暨青海湖可持续发展研讨会”有关专家披露．目前我国有70％的湖泊受到了污染．75％的湖泊出现了不同程度的富营养化。由此可见．我国治理湖泊水体污染和富营养化的任务相当艰巨。近年来科研人员发现．利用人工湿地技术对引起水体富营化的关键因子氮、磷有较好的去除效果。     

大地热流对滇池环境的影响与滇池污染治理的新思路

滇池经过长达7年、投资40多亿元的治理,在污染源头控制上已经取得了明显成绩,在一定程度上缓解了生态环境的进一步恶化。滇池水体水质至今没有好转的根本原因在于对滇池蓝藻爆发机理的认识没有考虑其所处的特殊地理环境。滇池水体富营养化之后,是由于较高的大地热流背景和四季如春的气候条件使蓝藻得以不停息地繁殖,致使滇池的水生生态系统完全瘫痪,水体完全失去自净能力。“抑制蓝藻的繁殖”和“清除水体中的营养物质”两大问题形成了滇池治理中一个难解的死结。解开死结的有效措施是从抚仙湖调清水给滇池换水,恢复草海,提高湖水自净能力,发展水生生态系统,抑制藻类繁殖。     

利用黑土洼沟净化官厅水库入库水水质研究

对高含沙、低污染永定河河水进行初步净化处理,是解决官厅水库水体污染,恢复水库向北京市供水功能的重要途径之一.示范工程研究表明,永定河水经黑土洼沟沉淀、大气富氧、增加水体停留时间等作用,对SS、COD、BODs、总氮TN、总磷TP的平均去除率分别达到87.4%、47%、36%、72%、73%,处理系统可大幅度减少入库污染物质总量,降低河湖富营养化发生的危险.     

High resolution X-ray fluorescence spectrometry for water analysis of metals in East China Sea

Within the last century, water pollution has become a major problem throughout the world. Aquatic systems are endangered by many different types of pollution but one of the most threatening is contamination by heavy metals, for example, Cd, etc. The presence of these metals is mainly due to industrial wastes or mining wastes being improperly treated and dumped into the water supply. The contamination may damage marine organisms or create changes in the aquatic environment. For these reasons, monitoring the concentrations of trace elements in rivers, coastal waters and open seawater is very important for environmental conservation. Like many countries in the world, China is facing the serious problem of water pollution in its aquatic system. Areas like the Yangtze River have been industrialized very quickly, and without proper waste control practices the pollution levels have increased with the economic growth. The Yangtze River covers thousands of square kilometers and crosses more than half of China before reaching the East China Sea.     

城市缓流水体污染成因分析及维护对策

在讨论城市缓流水体的运移特征、水化学过程及污染源的基础上,提出了建立科学的城市水务管理体制,城市水利工程与生态工程建设相结合,充分发挥水系工程在城市水体环境保护中的作用,以及完善暴雨污水综合治理方法等保护城市缓流水体的对策.     

AAssessment of the spatial-temporal eutrophic character in the Lake Dianchi

Water-quality deterioration and eutrophication of the Lake Dianchi have acquired more and more attention in the last few decades. In this paper, the spatial and temporal eutrophication status of the Lake Dianchi was assessed. The comprehensive trophic state index was chosen to assess the trophic status of the Lake Dianchi in the past 13 years. The result reveals that the trophic condition of Caohai is more serious than that of Waihai. Most of time Caohai was in extremely hypereutrophic state from 1988 to 2000. The trophic condition of Waihai had a worsening tendency from 1988 to 2000. Waihai was in eutrophic state before 1995, but it got in a hypereutrophic state after 1995. It was pointed out that TN and TP were the two biggest contributors of CTSIM in both Caohai and Waihai.