DOI: 10.1002/grl.50224
论文题名: Small-scale permeability heterogeneity has negligible effects on nutrient cycling in streambeds
作者: Bardini L. ; Boano F. ; Cardenas M.B. ; Sawyer A.H. ; Revelli R. ; Ridolfi L.
刊名: Geophysical Research Letters
ISSN: 0094-9216
EISSN: 1944-8947
出版年: 2013
卷: 40, 期: 6 起始页码: 1118
结束页码: 1122
语种: 英语
英文关键词: groundwater-surface water interaction
; Hyporheic processes
; Sediment heterogeneity
; Solute transport
Scopus关键词: Biogeochemical reactions
; Groundwater-surface water interaction
; Hyporheic
; Nutrient concentrations
; Nutrient distributions
; Nutrient transformations
; Permeability heterogeneity
; Sediment hydraulic properties
; Aquifers
; Flow fields
; Groundwater resources
; Hydrogeology
; Residence time distribution
; Sedimentology
; Sediments
; Solute transport
; Water quality
; Nutrients
; biogeochemical cycle
; groundwater-surface water interaction
; heterogeneity
; homogeneity
; hydraulic property
; hyporheic zone
; mathematical analysis
; numerical model
; nutrient cycling
; permeability
; reactive transport
; sediment transport
; solute transport
; stream bed
; timescale
; water flow
; water quality
英文摘要: Aquatic sediment hosts coupled pore water flow and biogeochemical reactions that mediate water quality across the fluvial corridor including adjacent alluvial aquifers. However, the effect of small-scale variations in sediment hydraulic properties on nutrient transformation occurring within the sediment is poorly understood. We show through numerical flow and transport simulations, for two realistic heterogeneous permeability cases typical of lowland rivers and two idealized homogeneous ones, that there is little difference in the reactive transport fields, the bulk reaction rates, and nutrient sink/source function despite stark differences in flow fields. This is because the reactions are ultimately controlled by characteristic or bulk residence times that are similar for the heterogeneous and homogeneous cases. This is a promising result for predictive models based solely on relative ratios of residence times and reactive time scales. Key Points Effect of permeability heterogeneity on nutrient dynamics is poorly understood Flow fields and nutrient concentration fronts in the streambed are simulated Sediment heterogeneity poorly affects streambed nutrient distribution. ©2013 American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84876904089&doi=10.1002%2fgrl.50224&partnerID=40&md5=0a258eedc7709f2af13156ee6a456a9a
Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/6480
Appears in Collections: 气候减缓与适应
There are no files associated with this item.
作者单位: Department of Environment Land and Infrustructure Engineering, Politecnico di Torino, Corso Duca degli Abruzzi 24, Turin 10129, Italy
Recommended Citation:
Bardini L.,Boano F.,Cardenas M.B.,et al. Small-scale permeability heterogeneity has negligible effects on nutrient cycling in streambeds[J]. Geophysical Research Letters,2013-01-01,40(6).