Integrated analysis of flow, form, and function for river management and design testing
Integrated analysis of flow, form, and function for river management and design testing
复制标题
河流管理和设计测试的流量、形态和功能综合分析
DOI：
10.1002/eco.1969
复制
发表时间：
2017
期刊：
影响因子：
2.6
通讯作者：
Samuel Sandoval Solís
中科院分区：
文献类型：
--
作者：
B. Lane;G. Pasternack;Samuel Sandoval Solís
许多河流生态系统功能的范围和时间是由径流动力学与河流廊道形状和结构的相互作用控制的。然而，大多数河流管理研究评估的作用，无论是流量或形式，而不考虑他们的动态相互作用。本研究开发了一个综合的模拟方法，以评估不同的河流流量和形式配置造成的生态系统功能的变化。此外，它还研究了时间变化在这种流-形-功能权衡中的作用。使用合成的原型河道形态代替高分辨率地形数据，减少了时间和资金需求，克服了特定场地的地形特征，并允许对任何感兴趣的形态结构进行评估。在加州的地中海山地溪流的应用中，通过一套与水文地貌过程和水生栖息地相关的生态系统功能，评估了通道形式、水年类型和水文损害的相互作用。河道形态对水文地貌过程起主导作用，而水年类型控制鲑类栖息地功能。水力发电引起的径流变化增加了redd脱水风险，并改变了水生生境的可用性。研究结果强调了生态系统功能表现的关键权衡，并强调了在多个尺度上流动和形式的时空多样性对维持河流生态系统完整性的重要性。所提出的方法是广泛适用的，并可扩展到其他系统和生态系统功能，其中的研究结果可以用来通知河流管理和设计测试。
The extent and timing of many river ecosystem functions is controlled by the interplay of streamflow dynamics with the river corridor shape and structure. However, most river management studies evaluate the role of either flow or form without regard to their dynamic interactions. This study develops an integrated modelling approach to assess changes in ecosystem functions resulting from different river flow and form configurations. Moreover, it investigates the role of temporal variability in such flow–form–function trade‐offs. The use of synthetic, archetypal channel forms in lieu of high‐resolution topographic data reduces time and financial requirements, overcomes site‐specific topographic features, and allows for evaluation of any morphological structure of interest. In an application to California's Mediterranean‐montane streams, the interacting roles of channel form, water year type, and hydrologic impairment were evaluated across a suite of ecosystem functions related to hydrogeomorphic processes and aquatic habitat. Channel form acted as the dominant control on hydrogeomorphic processes, whereas water year type controlled salmonid habitat functions. Streamflow alteration for hydropower increased redd dewatering risk and altered aquatic habitat availability. Study results highlight critical trade‐offs in ecosystem function performance and emphasize the significance of spatio‐temporal diversity of flow and form at multiple scales for maintaining river ecosystem integrity. The proposed approach is broadly applicable and extensible to other systems and ecosystem functions, where findings can be used to inform river management and design testing.
(7) 清水谷聪，“重新设计社会保障体系的“世界标准”数据的准备”，日本经济新闻，2007年3月16日。
DOI：
--
发表时间：
--
期刊：
影响因子：
--
作者：
通讯作者：
--