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邛海水质变化趋势及保护对策研究 总被引:1,自引:0,他引:1
本文通过对邛海流域现状污染源进行调查,邛海流域COD、氨氮、总氮和总磷产生量分别为5892.1t/a、995.6t/a、2888.2t/a和1105.1t/a,污染负荷主要来自面源污染.通过2002 ~ 2011年邛海水质监测数据分析,邛海水质近10年总体保持Ⅱ~Ⅲ类,处于中营养状态,2004~ 2006年水质相对较差,2006年以后水质逐渐好转.总磷、总氮是邛海主要污染因子,海河口是邛海污染最严重的区域.为实现邛海水质和流域生态环境持续改善,从产业结构优化、流域污染源治理、生态保育和流域生态环境综合监管等方面提出对策建议. 相似文献
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四川三台鲁班水库属于大型湖库,多年来除具有特色景观作为旅游景点外,主要用于发展水产养殖业。随着时间的延续,养殖规模的不断扩大,湖库的自净能力越来越差,使有机物污染不断加重,水质越来越差,出现富营养化现象,对水环境造成了不利影响。近年来,为了改变湖库水环境质量,调整转化湖库功能,恢复水环境质量,加强了对其水质的监测,其中的营养状态指标是湖库水环境质量的主要评价指标。评价结果,除秋季和冬季个别月份外,其余各月均有测点达到轻度富营养化及中度富营养化。 相似文献
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根据2006~2017年水质监测数据资料,对升钟水库水质和营养化状态变化进行分析,探讨了水库水质演变规律、富营养化发展趋势及主要影响因子,同时利用线性回归模型和累积概率密度模型对升钟水库富营养化未来5年的发展趋势进行风险预测。结果表明:升钟水库水质呈上升趋势,水质状态为Ⅱ类。综合营养状态指数显示水库营养状态由富营养逐步向中营养转变,水体中的总氮、总磷、高锰酸盐指数呈显著下降趋势,分析表明总磷是升钟湖富营养化的关键限制因子,未来5年内升钟水库的大坝断面有富营养化的中度风险(58.78%)。为控制环境风险,针对性提出防治升钟水库富营养化的对策和建议。 相似文献
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西昌邛海水体污染及其综合整治与保护管理问题研究 总被引:6,自引:0,他引:6
本文阐述了邛海水体污染及其生态环境破坏的状况,剖析了污染源及其危害。同时,针对问题提出了全方位综合整治与保护管理具体措施。 相似文献
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尚佰晓 《中国环境管理干部学院学报》2013,(4):58-60,88
以2012年4月至10月的水质监测数据为基础,分析了凡河榛子岭水库上游河段水体的水质状况。结果表明:仅夹河厂断面9月监测的水质符合Ⅲ类水质要求,其余各月3个断面监测的水质均超出Ⅴ类水质标准,超标项目主要是总氮、氨氮和总磷;各监测断面水质除总氮、氨氮和总磷超标外,其他项目基本达到Ⅲ类水质标准。凡河榛子岭水库上游河段丰水期各监测项目的浓度值明显大于平水期和枯水期时期。导致水质超标的原因主要是农村面源污染。 相似文献
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In conjunction with socioeconomic development in watersheds, increasingly challenging problems, such as scarcity of water
resources and environmental deterioration, have arisen. Watershed management is a useful tool for dealing with these issues
and maintaining sustainable development at the watershed scale. The complex and uncertain characteristics of watershed systems
have a great impact on decisions about countermeasures and other techniques that will be applied in the future. An optimization
method based on scenario analysis is proposed in this paper as a means of handling watershed management under uncertainty.
This method integrates system analysis, forecast methods, and scenario analysis, as well as the contributions of stakeholders
and experts, into a comprehensive framework. The proposed method comprises four steps: system analyses, a listing of potential
engineering techniques and countermeasures, scenario analyses, and the optimal selection of countermeasures and engineering
techniques. The proposed method was applied to the case of the Lake Qionghai watershed in southwestern China, and the results
are reported in this paper. This case study demonstrates that the proposed method can be used to deal efficiently with uncertainties
at the watershed level. Moreover, this method takes into consideration the interests of different groups, which is crucial
for successful watershed management. In particular, social, economic, environmental, and resource systems are all considered
in order to improve the applicability of the method. In short, the optimization method based on scenario analysis proposed
here is a valuable tool for watershed management. 相似文献
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通过对2003-2007年山东省近岸海域水质监测数据的分析,总结其近岸海域的水质状况及污染特征,并采用秩相关系数法对山东省近岸海域水质状况时空变化趋势进行分析与评价。结果表明,山东省近岸海域水质以一、二类海水为主,黄海近岸海域水质略好于渤海。全省近岸海域污染以有机污染为主,主要污染因子为无机氮和化学需氧量。2003-2007年,山东省近岸海域水质变化趋势基本稳定,但主要污染物化学需氧量的含量呈上升趋势。 相似文献
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Richard H. McCuen Darryl E. Cook Robert L. Powell 《Journal of the American Water Resources Association》1980,16(1):79-85
ABSTRACT: Recent regulations require impact statements for major water development projects, including reservoirs that will be used for water supply, recreation, and pollution control. A water quantity/quality model was developed and used for making water quality projections of a proposed reservoir in Montgomery County, Maryland. The study area is uncommon in that there is an extensive water quality data base. The results indicate that land use changes will have a significant effect on water quality and that the proposed reservoir will improve the quality of the surface waters downstream from the reservoir. A major effect of land use changes is the increase in the variability of water quality. 相似文献
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Douglas G. Boyer 《Journal of the American Water Resources Association》2005,41(2):291-300
ABSTRACT: Water quality indicators of two agriculturally impacted karst areas in southeastern West Virginia were studied to determine the water quality effects of grazing agriculture and water quality trends following initiation of water quality improvement programs. Both areas are tributaries of the Greenbrier River and received funding for best management practices under the President's Initiative for Water Quality and then under the Environmental Quality Incentives Program (EQIP). After 11 years of study there was little evidence to suggest that water quality improved in one area. Three and a half years of study in the other area showed little evidence of consistent water quality improvement under EQIP. Lack of consistent water quality improvement at the catchment scale does not imply that the voluntary programs were failures. Increased livestock numbers as a result of successful changes in forage management practices may have overridden water quality improvements achieved through best management practices. Practices that target well defined contributing areas significantly impacting aquifer water quality might be one way to improve water quality at catchment scales in karst basins. For example, a significant decrease in fecal coliform concentrations was observed in subterranean drainage from one targeted sinkhole after dairy cattle were permanently excluded from the sinkhole. 相似文献