Saharsar tipiyarahmadi - Master's student environmental pollution – Tonekabon Azad University
mohammadreza Ansari - Professor, Faculty ofChalus Azad University

In this study, concentrations of heavy metals arsenic, cobalt, nickel and lead in samples of sedimentin the river dohezar tonekabonhas been paid. concentration changes as follows: Arsenic: 4 / 10_66 /70, Cobalt: 5 / 40_29 / 80, nickel: 12_80 and lead: 9 / 10_66 / 40 (ppm).The distribution of these four elements other than arsenic that the significant increase in surfacesediments show a similar distribution to the rest of the elements.GIS software interpolation toestimate the male and Pollution discussed

arsenic , cobalt ,nikel, lead , enrichment factor,kriging