『Abstract
　The chemical characteristics of surface, groundwater and mine water of the upper catchment of the Damodar River basin were studied to evaluate the major ion chemistry, geochemical processes controlling water composition and suitability of water for domestic, industrial and irrigation uses. Water samples from ponds, lakes, rivers, reservoirs and groundwater were collected and analysed for pH, EC, TDS, F, Cl, HCO3, SO4, NO3, Ca, <Mg, Na and K. In general, Ca, Na, Mg, HCO3 and Cl dominate, except in samples from mining areas which have higher concentration of SO4. Water chemistry of the are reflects continental weathering, aided by mining and other anthropogenic impacts. Limiting groundwater use for domestic purposes are contents of TDS, F, Cl, SO4, NO3 and TH that exceed the desirable limits in water collected from mining and urban areas. The calculated values of SAR, RSC and %Na indicate good to permissible use of water for irrigation. High salinity, %Na, Mg-hazard and RSC values at some sites limit use for agricultural purposes.

Keywords: Major ion chemistry; Damodar River basin; Water quality; SAR; RSC; Anthropogenic; India』

Introduction
Damodar River basin
Materials and methods
Results and discussion
　Major ion chemistry
　Groundwater
　Surface water
　Mine water
　Weathering and solute acquisition processes
　Saturation indices and dissolution/precipitation of carbonates
　Quality assessment
　　Suitability for drinking and general domestic use
　　Suitability for livestock
　　Suitability for irrigation uses
　　　EC and sodium percentage (Na%)
　　　Alkali and salinity hazard (SAR)
　　　Residual sodium carbonate (RSC)
　　　Permeability index (PI)
　　　Magnesium hazard (MH)
　　　Suitability for industrial use
Conclusions
Acknowledgments
References