Abstract
Flood spreading in mountainous regions is very different as compared with plains. Flood spreading in Koohdasht, Roomeshkan and keshmahour plains includs gabion structures, stilling basins, diversion dikes, banquets, and channels. An average of 25 million cubic meters per year infiltrate into the plain. Planting 170000 tree species results in an increase in forage production and a reduction in flood damage. Statistics indicate that the plain Roomeshkan has not been faced with reduced groundwater levels and discharge rates of the wells are normal.