Characteristics and evaluations of heavy metal contents in irrigation water sources on a suburb farmland in the lower reaches of Xijiang River in the early busy season of farming

Abstract The pollution of heavy metals in irrigation water was related to the management-control risk farmland and safe production crops. There were various sources suburb farmlands Xijiang River. We investigated distribution characteristics on a riverside inside-dyke According sample test results, it found that nearly 100% we concerned about detected study. box plot showed average content other elements ranged from 1.65 43.75 ?g·L?1, level cadmium 0.02 ?g·L?1 studied area. quantitative evaluation index analysis characteristics, most at relatively low concentration sources, while mercury far greater than elements, followed by arsenic. Arsenic had become increasingly prominent problems local sources. River quality more likely be affected river agricultural activities, groundwater natural causes. single/comprehensive water-quality evaluations, comprehensive I III, but single-factor evaluations samples arsenic two ‘Inferior’ level. Attention should paid monitoring (in groundwater) disposal methods inflow drainage increased if necessary, reducing influence human activities weathering leaching an effective measure avoid production.