Riverine dissolved organic carbon (DOC) plays a crucial role in supporting microbial ecosystems in rivers and oceans while also contributing to greenhouse gas emissions from freshwater systems.
In recent years, human-driven water regulation activities have significantly disrupted natural processes within, leading to alterations in hydrological and hydraulic dynamics and affecting material circulation and transport.
A collaborative research team led by the Institute of Atmospheric Physics of the Chinese Academy of Sciences has developed innovative models that account for both soil and riverine DOC dynamics, as well as the influence of anthropogenic water regulation activities. These models have been integrated into the land surface model CLM5.0.
The researchers found that in the majority of cases, the transport of DOC in rivers was predominantly reduced by surface water regulation. Prof. Xie Zhenghui, co-corresponding author noted,"The total impact of anthropogenic water regulation reduced global annual riverine DOC exports to the ocean by approximately 13.36 ± 2.45 Tg C yrIn addition, the greatest impact of anthropogenic water regulation activities was concentrated in the region from 23.
"Our innovative scheme for simulating DOC exports from terrestrial to aquatic systems is pivotal in accurately estimating global carbon budgets," said Prof. Jia Binghao, co-corresponding author of the study.Yanbin You et al, Impacts of anthropogenic water regulation on global riverine dissolved organic carbon transport,
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