摘要:Growth parameters of 15 year-old black locust ( Robinia peseudoacacia L.) trees were investigated in two areas irrigated 1) by municipal effluent and 2) well water, in south of Tehran, Iran. For this purpose, four sample plots of 30x30 m were randomly chosen in either of both areas. Measurements in sample plots indicated that diameter at breast height (d.b.h.), total height, crown length, crown diameter, basal area and standing volume of black locust trees were significantly greater in municipal effluent area than in well water area (p<0.01). Likewise, number, height and standing volume over the d.b.h. classes were greater on the effluent-irrigated site. The results suggest that municipal effluent can be utilized as an important source for providing required water of afforestaions with targets of wood production, green space, recreation and climate health in south of Tehran.