Modeling bioinfiltration surface dynamics through a hybrid geomorphic-infiltration model

IF 2.3 Q3 ENVIRONMENTAL SCIENCES
Richard Ampomah, Danielle Holt, Cole Smith, Virginia Smith, Kristin Sample-Lord, Jonathan Nyquist
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引用次数: 0

Abstract

Abstract Bioinfiltration systems are an increasingly prevalent mechanism for urban stormwater mitigation. One major challenge for the sustainability of bioinfiltration systems is erosion and channelization due to high bed shear stresses developed during large storm events. Sedimentation within these systems could also impact their performance as fine sediment may clog pathways necessary for infiltration. Understanding the geomorphology, shear stress, and sediment flux in the system can help predict maintenance needs associated with erosion and deposition. The current study introduces a framework for addressing this problem by combining a sediment transport model, FaSTMECH, with the Green-Ampt infiltration model. A comparison of observed and predicted ponding depths shows very good agreement (median Nash–Sutcliffe efficiency coefficient = 0.93) and demonstrates the ability of this novel framework in predicting the hydraulics and morphology within a bioswale bioinfiltration system. The framework introduced in this study opens the door to understanding sediment transport dynamics within a bioswale, which has the potential to advance planning and design to minimize impacts due to excessive erosion or deposition within bioswale bioinfiltration systems.
通过混合地貌-入渗模型模拟生物入渗表面动力学
生物渗透系统是一种日益流行的城市雨水缓解机制。生物渗透系统的可持续性面临的一个主要挑战是由于大风暴事件期间形成的高床剪切应力造成的侵蚀和渠化。这些系统内的沉积也会影响它们的性能,因为细小的沉积物可能会堵塞渗透所必需的途径。了解系统中的地貌、剪切应力和沉积物通量可以帮助预测与侵蚀和沉积相关的维护需求。目前的研究引入了一个框架,通过将沉积物输运模型FaSTMECH与Green-Ampt入渗模型相结合来解决这一问题。观察到的池塘深度和预测的池塘深度的比较显示出非常好的一致性(纳什-苏特克利夫效率系数中值= 0.93),并证明了这种新框架在预测生物沼泽生物渗透系统中的水力学和形态方面的能力。本研究中引入的框架为理解生物沼泽中的沉积物运输动力学打开了大门,这有可能推进规划和设计,以尽量减少生物沼泽生物渗透系统中过度侵蚀或沉积造成的影响。
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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来源期刊
Blue-Green Systems
Blue-Green Systems Multiple-
CiteScore
8.70
自引率
0.00%
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