Spatial and temporal variability of environmental flow indicators - developing the tools for an ecologically meaningful assessment of hydrological change

环境流量指标的时空变化 - 开发对水文变化进行具有生态意义的评估的工具

• 批准号: 5436473
• 负责人: Professorin Dr. Doerthe Tetzlaff
• 金额: --
• 依托单位: Leibniz-Institut für Gewässerökologie und Binnenfischerei (IGB)
• 依托单位国家: 德国
• 项目类别: Research Fellowships
• 财政年份: 2004
• 资助国家: 德国
• 起止时间: 2003-12-31 至 2009-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/5436473?language=en
• 关键词: Spatial; temporal; variability; environmental; flow

Altfbough the role of hydrology in sustaining river ecosystems is recogised, there is still a major scientific challenge in fully understanding the way river hydrology and flow dynamics affect aquatic ecosystems. Consequently, the ways in which such interrelationships are influenced by human activities such as urbanisation or reservoir operation remain unclear. For an ecologically meaningful assessment of hydrological change, integrative approaches are needed that link the spatikal and temporal variability of hydrological parameters - whose effects are mediated by the physical characteristics of river channels (hydromorphology) - with ecological responses. The proposed project will investigate the variability of selected hydrological parameters, at a range of spatial and temporal scales, in nested research chatchments of relatively natural river systems in Scotland. The influence of such variability on aquatic ecosystems will also be assessed. In addition to a comprehensive statistical analysis of existing extensive discharge and biological data sets, complementary experimental measurements - both for discharge and ecological response - will also be conducted. Furthermore, the ecologically significant hydrological parameters will be applied in catchments with river regulation schemes for hydropower production. Thus hydrological changes and their ecological impacts will be assessed. The proposed project will contribute to the testing of existing hypotheses concerming the relationship between the ecological functioning of river systems and hydrological change. Such work will significantly contribute to the development of guidelines which are needed to protect and enhance the ecological status of rivers as required by the EU Water Framework Directive (WFD).

尽管水文学在维持河流生态系统中的作用已得到认识，但充分了解河流水文学和水流动力学影响水生生态系统的方式仍面临重大科学挑战。因此，城市化或水库调度等人类活动如何影响这种相互关系仍不清楚。为了对水文变化进行具有生态意义的评估，需要采用综合方法，将水文参数的空间和时间变化（其影响由河道的物理特征（水文形态）介导）与生态响应联系起来。拟议的项目将在苏格兰相对自然的河流系统的嵌套研究区域中，在一系列空间和时间尺度上调查选定水文参数的变异性。还将评估这种变化对水生生态系统的影响。除了对现有的广泛排放和生物数据集进行全面统计分析外，还将进行排放和生态响应的补充实验测量。此外，具有生态意义的水文参数将应用于具有水电生产河流调节计划的流域。因此，将评估水文变化及其生态影响。拟议项目将有助于检验有关河流系统生态功能与水文变化之间关系的现有假设。此类工作将极大地促进制定保护和增强欧盟水框架指令（WFD）要求的河流生态状况所需的指南。