A Study of the Effect of Biological Stabilization on the Decrease of soil Erosion (Case Study: Nour Hasalak Varazan Forests)

Following the destruction of vegetation and increasing soil water losses in watersheds violators of the last decades due to uncontrolled exploitation and unethical's resources has intensified. This contributed to increased life expectancy and reduced flood sedimentation tanks Dam reservoir lower production and production losses in the national capital. This study aims to assess the impact of some measures of biological functions (forestry, pastoral work) in varazan village in mazandaran kojoor area planted seedling in previous years has been chosen and checked. In thisresearch andhepothese are defined such as :Does the implementation of biological measure is the reason for soil erosion is reduce. How these factors efecton the establishment of vegatation condition will get better with time or not? is conducted on erosion and sediment yield. • .This information is necessary to achieve applicable results before and after project implementation and evaluation of biological placed. • All information on this project as the basis for the study of field work for this study has been Measure implemented after the study is the most important part of the comparison In this study, the relationship of the natural soil is universal formula. Kidneys cases mentioned in the Universal Soil Equation (A = RKLSCP) has been studied. The maps of the study area classified into 14 units (based on the direction and velocity) on the map, we proceed to the grid. Then the plots in a randomized systematic sampling grid based on the purpose of determining the nature of the plot, we would like to implement. Methods based on field sampling and density of vegetation soil profile and other relevant information. To soil erosion and sedimentation. Recognizing the important measure as well as other items used in the Universal Soil equation. Fraction of vegetation cover systemic random line transect method, 44 samples were taken Estimating canopy as well as 14 hidrologycal units (per unit of work) is taken to determine the direction the item was sent to the Laboratory of Soil Science. Precedent canopy and density of 62 percent to 84 percent increase then the result of calculations obtained with the deposition rate of the output area of 5.8 ha to 4.3 tons per hectare This result means that the corrosion rate has decreases with increasing vegetation therfor the hypotesis was accepted.