Fig. 4From: Monitoring of the changes in potential environmental risk of some heavy metals in water and sediments of Burullus Lake, EgyptModified degree of contaminations (mDc) variations in 3 years. a Using this generalized formula to calculate the degree of contamination: mDc = (∑Dc)/n. b Results show the degree of contamination in bottom sediments through different 3 yearsBack to article page