Effects of floodwater spreaging on qualitative and quantitatire changer of Vegetative cover on nar mashir of bam.

After performing water spreading and limiting the area of project , direct census of soil moisture factors and sedimentation and vegetative cover (production, distribution patterns, percent of canopy cover) were recorded. Based on the research method , collected statistical factors were analyzed with SPSS software , T-test and factorial design. The difference between the area of water spreading and control area was significant. In addition , Vegetative type such as: shrubs, furb and grass were examined which The differences ware significant, too.After calecting 114 region`s plant species they were identified of which 23 species were palatabile, 42 species were semi-palatabile and livestock use Them , and 49 species were non palatabile. Moreover, the collected species were classified based on&rdquoRunkmer classification&rdquoand their biological shapes. 5 species were phanerophytas , 26 species were chamaephytas, 13 species were homocry- ptophytas , 21 species were geophytas, and 49 species were therophytas. This classification was in agreement with the classification of the research area. The plants of the area were examined based on the type of consumption. Among the collected species , 4 of them were industrial , 21 species were medical , one of species was edible, 69 species were pastures and 31 species were invasion plant and poisonous. During the research , the ways of substituting good species with invasion ones, growing valuable and local trees, reproducing the imported species were found. The amount of entered sediment was examined by ways of Turbidity and having schedules at fixed points that were 552 T/h and 512 T/h respectivly. The humidity of soil in different dept points (0-150cm) in the area of water spreading and control area in different years by monthly sampling and the drought curve were examined that in both parts the differences were significant.