Research progress on nitrogen biogeochemical processes in coastal groundwater
Nitrogen biogeochemical processes and evolution in the coastal zone are key issues of water resources management and ecological environment protection of the coastal area.Under the influences of climate fluctuation and ocean tide dynamic,the nitrogen biogeochemical processes in coastal groundwater generally exhibit temporal variability.Aiming at the scientific problem of evolution mechanism of coastal nitrogen biogeochemical processes,based on literature research,this paper summarized six factors affecting the nitrogen biogeochemical processes in coastal zones,including temperature,tide and wave,seawater intrusion,salinity,biological disturbance and groundwater dynamic conditions.In addition,this paper summarized the main research methods for researching coastal nitrogen biogeochemical processes,including field monitoring,laboratory experiment and numerical simulation.Furthermore,to achieve high precision quantitative identification of nitrogen biogeochemical processes under complex conditions,we suggest that the numerical simulation should be combined applied with indoor and outdoor methods based on a comprehensive consideration of multi-factors such as meteorology and hydrology,tide dynamic,temperature,salinity,biological disturbance and aquifer heterogeneity.
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