Water Sources, Water Chemistry, and Contamination in the Aquatic Ecosystem(s)

Dear Colleagues,

Currently, most of the aquatic ecosystem worldwide has been impounded, which causes a series of changes in hydrodynamics, water chemistry, and ecosystem structure and function. River waters and glaciers are important and valuable sources of water supply throughout the globe. The rock composition, climatic conditions, soil properties, physiographic setup of the area, and anthropogenic activities are dominantly controlling the quality/quantity of river water. Water-aquifer matrix interaction, atmospheric inputs, recharging water, anthropogenic inputs, geological structures, and hydrogeochemical processes are the key factors that regulate the ionic composition of river water. The ionic composition of river water is mostly controlled by hydrogeochemical processes such as calcite dissolution, silicate weathering, carbonate weathering, active ion exchange mechanisms, and residence duration along distinct flow paths. Understanding many hydrogeochemical, hydrological, and biogeochemical processes that regulate the ionic composition of river water will help in successful water resource management. Understanding the contribution of various recharge sources (precipitation, snow, glacier runoff, lakes, snow, soil water, and groundwater), the sources and processes that determine river flow are important, particularly in light of global warming, which may affect the flow of major rivers fed by glaciers by reducing the glacier cover. Water quality describes the condition of the water, including chemical, physical, and biological characteristics, usually with respect to its suitability for a particular purpose such as drinking. Dissolved organic matter (DOM) plays many important roles in surface water: maintain the drinking water quality, control the photochemical processes, form metal-DOM complexation that can result transport and fate of trace metal, cycling and regeneration of nutrients from DOM as well as from POM (e.g., phytoplankton), maintain global carbon cycle processes and finally act as a useful indicator for characterizing various point source water for better understanding DOM sources. The major portions of DOM are useful indicators that can identify and characterize biogeochemical processes.

Main themes (but not inclusive) of this Research Topic are:

• Water sources
• Lake water chemistry
• River water chemistry
• biogeochemical processes
• Eutrophication
• Stable Isotope analysis
• Environmental Geochemistry
• Chemical weathering in Rivers
• Dissolved organic matter in surface water
• Ionic composition of river water
• Spatiotemporal variation of WQ parameters
• Point and non-point source pollution of water bodies
• Modelling of the change in the biophysical supply of nutrients under baseline and future climate projections.
• Water quality assessment
• Glacier and snow chemistry
• Point and non-point source pollution of water bodies
• Spatial modeling of water quality
• Remote sensing for assessing the water quality of lakes and rivers
• Water quality: characteristics, modeling, modification
• Water quality in sustainable water management
• Groundwater potential mapping
• Machine learning for water chemistry analysis

I look forward to receiving your contributions.

Dr. Mohd Aadil Bhat
Guest Editor Assistant

Dr. Gowhar Meraj
Dr. Amit Kumar
Guest Editors

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• water chemistry
• river water quality, groundwater quality
• water sources
• water quality
• source contributions
• environmental impact assessment
• environment
• eco-hydrology
• ionic composition
• water contamination
• biogeochemical processes
• freshwater
• DOM
• wastewater
• environmental geochemistry
• geospatial modelling
• interpolation for water quality analysis
• glaciers
• snow
• SWE and water quality