Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1029/2021WR030974 |
The Relationship between Delta Form and Nitrate Retention Revealed by Numerical Modeling Experiments | |
Deon Knights; Audrey H. Sawyer; Douglas A. Edmonds; Elizabeth A. Olliver; Rebecca T. Barnes | |
2021-12-06 | |
发表期刊 | Water Resources Research |
出版年 | 2021 |
英文摘要 | River deltas display a wide range of morphologic patterns that influence how nutrients interact in channels and wetlands on their way to the coast. To quantify the role of delta morphology on nitrate fate, we simulated reactive nitrate transport over steady base flow conditions for six synthetic, morphologically unique river-dominated deltas created in Delft3D by varying incoming grain size distributions. We parameterized nitrate removal kinetics using an observed relationship with elevation from Wax Lake Delta (Louisiana, USA). Total nitrate retention across the six synthetic deltas and Wax Lake Delta ranged from 1.3-13%, suggesting that these river-dominated deltas have limited ability to remove nitrate from incoming river water. Nitrate removal is constrained by limited hydrologic connectivity with the areas of greatest nitrate demand, which are found at higher elevation. In these synthetic numerical experiments, the efficiency of nitrate removal is greatest for deltas with more topologic complexity and greater proportions of the delta plain at higher elevation, which are both common characteristics of coarser-grained deltas. The positive relationship between grain size and nitrate removal may help guide land reclamation projects if project goals include minimizing nitrate export to the sea. This article is protected by copyright. All rights reserved. |
领域 | 资源环境 |
URL | 查看原文 |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/343038 |
专题 | 资源环境科学 |
推荐引用方式 GB/T 7714 | Deon Knights,Audrey H. Sawyer,Douglas A. Edmonds,et al. The Relationship between Delta Form and Nitrate Retention Revealed by Numerical Modeling Experiments[J]. Water Resources Research,2021. |
APA | Deon Knights,Audrey H. Sawyer,Douglas A. Edmonds,Elizabeth A. Olliver,&Rebecca T. Barnes.(2021).The Relationship between Delta Form and Nitrate Retention Revealed by Numerical Modeling Experiments.Water Resources Research. |
MLA | Deon Knights,et al."The Relationship between Delta Form and Nitrate Retention Revealed by Numerical Modeling Experiments".Water Resources Research (2021). |
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