• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Ecological engineering: The Journal of Ecotechnology >Environmental flow management strategies based on the integration of water quantity and quality, a case study of the Baiyangdian Wetland, China
【24h】

Environmental flow management strategies based on the integration of water quantity and quality, a case study of the Baiyangdian Wetland, China

机译：基于水量和水质综合的环境流量管理策略-以中国白洋淀湿地为例

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Environmental flow plays an important role in sustaining or improving wetland ecosystems. There are many methods for environmental flow assessments, most of which only focus on simplistic environmental flow standards or theoretical cause -effect relations between flow regimes and target species. However, traditional assessments may not be suitable for ecosystems with severe water quality deterioration. Ignoring relationships among flow, water quality, and multi -level ecological responses in real and complex ecosystems may misguide management practices and lead to further ecosystem degradation. To investigate impacts of flow alteration on ecosystems with different pollution rates, and examine the underlying mechanisms, a two-dimensional hydraulic and ecological model was developed in this study. This model simulates flow circulation; pollutant transport; and the interactions between flow, nutrients, and holistic ecosystem characteristics. The integrated model was applied to 21 scenarios to understand ecosystem characteristics in response to various environmental flow rates and water quality standards. Finally, holistic indicators including total primary production/total respiration, total biomass/total production, eco-exergy, and structural eco-exergy are used to quantify the effects of different scenarios on ecosystem health, and provide scientific environmental flow recommendations. The proposed method was applied to Baiyangdian, the largest wetland in the North China Plain. The results indicate that the annual environmental flow should be higher than 2 m(3)/s in order to prevent the Baiyangdian ecosystem from further degradation. To maintain an optimal ecosystem status, the minimum environmental flow should be kept as 5-9.5m(3)/s, and the maximum environmental flow should be kept as 9-13.5 m(3)/s in different hydrological years. In addition, the water quality should be always kept at or above the Chinese class IV standard. This result can guide basic research in hydroecology and assist further implementation of comprehensive environmental flow management. (C) 2016 Published by Elsevier B.V.
机译：环境流量在维持或改善湿地生态系统中起着重要作用。环境流量评估方法很多，其中大多数只关注简化的环境流量标准或流量态势与目标物种之间的理论因果关系。但是，传统评估可能不适用于水质严重恶化的生态系统。忽略真实和复杂生态系统中流量，水质和多级生态响应之间的关系可能会误导管理做法，并导致生态系统进一步退化。为了研究流量变化对具有不同污染率的生态系统的影响，并研究其潜在机理，本研究建立了二维水力和生态模型。该模型模拟流动循环;污染物运输;以及流量，养分和整体生态系统特征之间的相互作用。将该综合模型应用于21种情景，以了解各种环境流量和水质标准所对应的生态系统特征。最后，整体指标包括初级总产量/总呼吸量，总生物量/总产量，生态能用和结构生态能用被用来量化不同情景对生态系统健康的影响，并提供科学的环境流量建议。该方法被应用于华北平原最大的湿地白洋淀。结果表明，年环境流量应大于2 m（3）/ s，以防止白洋淀生态系统进一步退化。为了保持最佳的生态系统状态，在不同的水文年中，最小环境流量应保持在5-9.5m（3）/ s，最大环境流量应保持在9-13.5 m（3）/ s。此外，水质应始终保持在中国IV级标准以上。该结果可指导水生态学基础研究，并有助于进一步实施全面的环境流量管理。 （C）2016由Elsevier B.V.发布

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号