Water Chemical Characteristics and Safety Assessment of Irrigation Water in the Northern Part of Hulunbeier City, Grassland Area in Eastern China

Hulun Buir Grassland is a world-famous natural pasture. The Chenbalhu Banner coalfield, the hinterland of grassland, located on west slope Great Khingan Mountains and north bank Hailar River in China. proven geological reserves coal are 17 billion tons. plays role ecological barrier, regional industry, power transmission from to east south. proportion local groundwater irrigation, domestic industrial production water sources about 86%. large-scale exploitation resources continuous emergence large unit coal-fired plants have consumed amount resources, resulting decrease level changing flow field groundwater. This paper studies background hydrochemical values evaluates irrigatibility whole Chenbaerhu impact industry chains such as mining areas chemical hydrochemistry characteristics above two provide important guiding for economic structure planning, governance. study found that Na+ HCO3− area occupy dominant position. Referring comparison lowest three types standards Quality Standards Groundwater (GB/T14848-2017), NH4+, NO2− exceeding standard close more than 30%. main river Na Ca·Na, surface Na·Ca, type confined HCO3−Na. formation mainly affected by dissolution, filtration evaporation rocks, specifically dissolution sodium calcium salts. correlation analysis shows there abnormal at many points area. Further combining with horizontal human activities area, it influence scope mine extremely limited. polluted quantity cattle sheep manure, sewage pollution farmland fertilizer.