Denitrification in heterogeneous aquifers: Relevance of spatial variability and performance of homogenized parameters

Henri, Christopher V.; Harter, Thomas

doi:10.1016/j.advwatres.2022.104168

Cited by 6 publications

(1 citation statement)

References 47 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Harris et al 27 observed that soil organic nitrogen shows signature of fertilizer-derived nitrogen due to its incorporation into it. Henri and Harter 28 analyzed the spatial variability in the denitrification in the aquifer and denitrification rate coefficient value using a numerical approach. It was observed that the denitrification rate coefficient depends on the concentrations of NO 3 − , structural heterogeneity, and hydraulic properties.…”

Section: Introductionmentioning

confidence: 99%

Isotopic Evidence of Denitrified Nitrate in Groundwater beneath Intensive Agriculture and Exchange with Estuary (Godavari, India)

Kumar,

Sridevi,

Sarma

et al. 2024

ACS EST Water

View full text Add to dashboard Cite

Nitrate is accumulated in the groundwater, modified through nitrification/denitrification, and exchanged with coastal/estuarine water bodies. To examine the sources and modifications of nitrate, the concentrations and isotopic composition of nitrate (δ 15 N and δ 18 O NOd 3 ) in the groundwater was monitored at 5 locations along the bank of Godavari estuary and in the estuarine waters for 7 months during wet (August−November) and dry (March−May) periods. Though the concentration of nitrate (NO 3 − ) was higher during the wet than dry periods in both the groundwater and estuary, insignificant seasonal variability was observed in δ 15 N and δ 18 O NOd 3 indicating homogenization through mineralization−immobilization turnover of NO 3 − . The range of δ 15 N to δ 18 O of NO 3 − indicates soil, manure, and septic waste may be the major source of NO 3 − . The mean ratio of δ 15 N/δ 18 O of 1.1 ± 0.3 indicates the occurrence of denitrification in the groundwater. Concentrations δ 15 N NOd 3 and δ 18 O NOd 3 of NO 3 − displayed a significant relation between groundwater and estuarine water suggesting that NO 3 − is possibly denitrified. This study suggests that denitrified NO 3 − (enriched δ 15 N and δ 18 O) reported in the Godavari estuary may be contributed through submarine groundwater discharge than it is hypothesized to flux from the watershed.

show abstract

Section: Introductionmentioning

confidence: 99%