于桥水库水污染因素调查分析

于桥水库自1983年作为引滦入津工程重要调蓄水库后,在一定程度上出现水体富营养化现象。近年来,于桥水库上游潘家口水库和迁西、遵化等沿途地区排放的污水污物不断增加,这些污染物通过黎河输水和汇流河道排入库内。另外,天津市境内水库周边流域村落农田等点面源污染也增加了水库污染负荷,致使水库水体水质恶化和富营养化趋势加剧,造成近年来水库内水草泛滥、藻类生长,严重影响了向天津市供水的水质。

针对农田地下水污染(氮磷元素)设计实验监测与分析

农田中富含氮、磷元素化肥农药的大量使用导致了严重的环境污染。该文在某农田基地布设实验进行农田地下水氮磷元素污染物时空变化特征监测与分析,得到结论:地下水中污染物的消长主要与土壤水分有关,同时施氮量,土壤类型,土地利用方式也是影响地下水中污染物浓度重要因子,并对解决这一污染问题提出了建议。

Study on Management and Control of Nonpoint Source Pollution from Urban Surface Runoff

Urbanization is the dominant form of land-use change in terms of impacts on water quality, hydrology, physical proper- ties of watersheds and their nonpoint source (NPS) pollution po- tential at present. Urbanization has changed the source, process and sink of urban NPS pollution, especially raised the pollution load of urban runoff NPS in receiving water. Urban runoff pollu- tion is a hot spot of research on NPS. This paper analyzed type, source and harm of the NPS pollutants of urban runoff and its influence on the receiving water. Through estimating NPS pollu- tion load of urban runoff and summarizing the law and character- istics of urban runoff NPS systemically, study on management and control of urban runoff NPS pollution was focused on the applica- tion of BMPs (best management practices). It is a fresh method- ology that management and control on NPS pollution from urban surface runoff was analyzed by methods of landscape ecology, environmental economics and environmental management. The paper provided a scientific reference for mitigating urban water environment pressure and an effective method for management and control of NPS pollution from urban surface runoff..

云南省玉溪市杞麓湖及主要入湖河道(含湿地)水质监测分析与评价报告和改善水质方案及措施建议

通过对云南省玉溪市杞麓湖及主要入湖河道(含湿地)水质检测分析与杞麓湖周边点源、面源调查发现,总氮为主要污染物,6条河流总氮均超标,超标率为85.7%,最大超标倍数24.4倍(白鱼沟),最小超标倍数0.03倍(者湾河),再加上杞麓湖水浅、底泥厚重,补水严重缺乏,从而导致杞麓湖总氮同样超标。通过云南省生态环境监测中心每年两次的监测发现均有不同程度的超标,最大超标倍数为0.05倍,本文经分析研究,针对以上问题提出有效改善杞麓湖水质状况的对策及建议。