Abstract The Ningxia Yellow River irrigation area, characterized by an arid climate and high
leaching of NO 3--N, exhibits complex and unique groundwater nitrate (NO 3--N) pollution …

Non-point nitrate pollution in groundwater has been accelerated by agricultural
development, but sustainable nitrogen removal is a challenge because of its wide …

Nitrate contamination of groundwater is a pressing global concern, affecting over 80 million
people worldwide, with agricultural activities being the primary contributor to nitrogen inputs …

Snowmelt contributes a significant fraction of groundwater recharge in snow‐dominated
regions, making its accurate quantification crucial for sustainable water resources …

Understanding the mixing between surface water and groundwater as well as groundwater
travel times in vulnerable aquifers is crucial to sustaining a safe water supply. Age dating …

Riparian zones with their buffering ability and abundant water supply are often subjected to
intensive agricultural activities. We investigated a riparian aquifer located near a stream in …

Urban expansion leads to increasing water pollution, impacting both human health and
ecosystems. This decline in water quality often stems from insufficient wastewater treatment …

Accelerated degradation of aquatic ecosystems caused by excessive nitrogen input has
focused more attention on denitrification, which can permanently convert reactive nitrogen …

Labeling groundwater by injecting an artificial tracer is a standard and widely used method
to study groundwater flow systems. Noble gases dissolved in groundwater are potentially …

Urban groundwater management requires a thorough and robust scientific understanding of
flow and transport processes. 3 H/3 He apparent ages have been shown to efficiently help …