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对改善生态系统服务的河岸运行条件的评估:Back Creek流域 (美国弗吉尼亚州) 的案例研究

Santosh R Ghimire¹, Brian Schumacher¹, Sherman Swanson²

¹U.S. Environmental Protection Agency, Office of Research and Development, 960 College Station Rd., Athens, GA, 30605, USA.

Journal of environmental management

|January 24, 2025

概括

这项研究评估了弗吉尼亚州Back Creek的河岸运行状况,使用正确运行条件 (PFC) 协议. 调查结果显示,52%的评估范围是PFC,而48%是由于土地使用变化而存在功能风险.

科学领域:

沿海生态沿海生态
环境科学环境科学
水文学的水文学

背景情况:

河岸运行状况评估河岸生态系统的生态健康,基于水文,植被和地形学.
正确运行条件 (PFC) 协议是由美国开发的. 内政部和农业部,为此评估提供了一种标准化的方法.
了解河岸健康对于管理水质和生态系统服务至关重要,特别是在受土地使用影响的流域.

研究的目的:

用PFC协议评估弗吉尼亚州Back Creek的河岸运行状况.
确定影响河岸健康和水质的关键因素,在背溪流域的流域.
将研究结果与以前的沿海缓冲区和生态系统服务权衡模型联系起来.

主要方法:

利用遥感数据和地理信息系统 (GIS) 来划分和描述26个河岸流域.
分析了38年的日常气候和水文数据 (1981-2018).
在Back Creek的10个里程 (19.3公里) 进行了现场侦察和PFC评估,应用了17个定性评估项目.

主要成果:

评估后溪长度的52%被发现处于正常运行状态 (PFC),得到了多样化的植被和稳定的通道特征的支持.
48%的评估长度被评为有风险的功能性 (FAR),主要是由于土地使用变化和城市基础设施.
对于PFC状况的关键驱动因素包括源流的平衡水和沉积物负载以及泛滥平原的可访问性.

结论:

该研究证明了PFC协议在识别沿海运行问题和评估非点源污染管理方面的有效性.
土地使用变化和城市发展对Back Creek流域的沿海生态系统健康构成重大风险.
这些发现为评估沿海健康状况和类似流域最佳管理实践的有效性提供了一种方法示例.

关键词:

最好的管理实践.水文学的水文学正确的运行条件正确的运行条件沿海地区的海岸地区.植物生长植物生长水的质量水的质量流域的流域是一个流域.

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