Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | DOI10.1088/1748-9326/ab90a6 |
Denitrification hotspots in intertidal mixing zones linked to geologic heterogeneity | |
James W Heiss; Holly A Michael; Mohammad Koneshloo | |
2020-07-31 | |
发表期刊 | Environmental Research Letters
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出版年 | 2020 |
英文摘要 | The mixing between fresh and saline groundwater in beach aquifers promotes biogeochemical transformations that affect nutrient fluxes to the coastal ocean. We performed variable-density groundwater flow and reactive transport simulations with geostatistical representations of sedimentary structure to understand the influence of heterogeneity on groundwater dynamics and denitrification in intertidal mixing zones. Ensemble-averaged simulation results show that heterogeneity can enhance mixing between fresh and saline groundwater and increase residence time, resulting in up to 80% higher nitrate removal relative to equivalent effective homogeneous aquifer sediment. Denitrification hotspots form in high permeability structures where DOC and nitrate are readily supplied by convergent flow. The results provide a physical explanation for the formation of denitrification hotspots observed in beach aquifers and illustrate for the first time the influence of sediment heterogeneity on rates and spatial patterns of biogeochemical processes in intertidal aquifers that are critical mediators of land-sea solute fluxes along world coastlines. |
领域 | 气候变化 |
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/287639 |
专题 | 气候变化 |
推荐引用方式 GB/T 7714 | James W Heiss,Holly A Michael,Mohammad Koneshloo. Denitrification hotspots in intertidal mixing zones linked to geologic heterogeneity[J]. Environmental Research Letters,2020. |
APA | James W Heiss,Holly A Michael,&Mohammad Koneshloo.(2020).Denitrification hotspots in intertidal mixing zones linked to geologic heterogeneity.Environmental Research Letters. |
MLA | James W Heiss,et al."Denitrification hotspots in intertidal mixing zones linked to geologic heterogeneity".Environmental Research Letters (2020). |
条目包含的文件 | 条目无相关文件。 |
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