Evaluating water quality change with hydrologic restoration in the Western Everglades (Florida, USA), an application of WAM

Paul Julian , Stephen E. Davis
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引用次数: 0

Abstract

Hydrologic restoration at the watershed scale is a complex process that can influence other processes and conditions within the watershed and downstream systems. Given these interrelated watershed scale processes, tools like models are essential to assess the potential effectiveness of sub-watershed to regional remediation strategies for ecological restoration. The goal of Everglades restoration is to restore the quality, quantity, and timing of water to one of the most ecologically unique and complex systems. This study aimed to evaluate changes to water quality associated with hydrologic restoration efforts within the Feeder Canal Basin as identified by the Western Everglades Restoration Project (WERP) by demonstrating, through simulations the potential effectiveness of implementing water quality remediation measures such as Best Management Practices (BMPs) and Stormwater Treatment Areas (STAs) within the WERP area. Additionally, to understand potential phosphorus sources and pre-develpoement conditions within the basin, a pre-development baseline was developed. Using the Watershed Assessment Model (WAM) various model alternatives including the WERP tentatively selected plan (TSP) were developed for a 22 year period of simulation. The implementation of both moderate and aggressive BMPs significantly reduced total phosphorus concentrations within the canal system at various levels indicating an improvement to near-field conditions. Meanwhile, not until the moderated BMPs and operation of an STA do water quality improvement become realized further downstream. The combined strategy of BMPs and STA demonstrates the integrated nature of nutrient remediation with both near and far-field benefits to the system with hydrologic restoration. This integrated strategy of water quality and hydrologic restoration can lead to a more sustainable and resilient restored ecosystem.

评估西部大沼泽地(美国佛罗里达州)水文修复带来的水质变化,WAM 的应用
流域尺度的水文恢复是一个复杂的过程,会影响流域和下游系统内的其他过程和条件。鉴于这些相互关联的流域尺度过程,模型等工具对于评估次流域到区域生态修复策略的潜在有效性至关重要。大沼泽地修复的目标是恢复水质、水量和水流时间,使其成为生态上最独特、最复杂的系统之一。本研究旨在评估西部大沼泽地修复项目(WERP)确定的支渠流域内与水文修复工作相关的水质变化,通过模拟演示在西部大沼泽地修复项目区域内实施水质修复措施(如最佳管理规范 (BMP) 和雨水处理区 (STA))的潜在效果。此外,为了了解流域内潜在的磷源和开发前的状况,还制定了开发前基线。利用流域评估模型 (WAM),开发了各种模型替代方案,包括 WERP 暂选计划 (TSP),模拟期为 22 年。实施适度和积极的 BMP 后,运河系统内不同水平的总磷浓度都有明显降低,表明近场条件有所改善。与此同时,在缓和型 BMP 和 STA 运行之后,下游的水质才有所改善。BMP 和 STA 的组合策略表明,营养物修复具有综合性质,可通过水文恢复为系统带来近场和远场效益。这种水质和水文恢复的综合策略可使恢复后的生态系统更具可持续性和复原力。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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