The efficiency of the geographic information system in preparing the erosion map And provide erosion control methods
Subject Areas : Environmental planning
Ebrahim
Yousefi Mobarhan
1
(Soil Conservation and Watershed Management Research Institute, Semnan Agricultural and Natural Resources Research and Education Center, Agricultural Research, Education and Extension Organization (AREEO), Semnan, Iran.)
Keywords: GIS, Erosion, Sediment, Managment,
Abstract :
Today soil erosion is considered a danger to human and life. In areas where erosion is not controlled, soils gradually erode and lose their fertility, so it is necessary to study the issue of erosion. According to a study conducted in the Masouleh watershed, there are two types of erosion intensity called type 3 or moderate erosion with an area of 28.15 km2, type 4 or high erosion with an area of 13.79 km2. The predominant forms of erosion in the region include mechanical, surface erosion, furrows, waterways and deposits. According to this study, the average amount of erosion based on Mpsiac method in this field is 4.81 tons per hectare per year, sediment delivery ratio (SDR) is 74.3 and the average amount of sediment in this field is 3.85 tons per hectare per year. It indicates moderate erosion and sedimentation in the whole area and high in some sub-fields. To control erosion and reduce production sediment in this area, various programs include holding training courses for people in dealing with nature, implementing management programs (including applying grazing systems, balancing livestock and pastures, development and medicinal plants), and conducting biological operations ( It has been suggested for rangelanding in the form of sowing, sowing, mulching and planting in a non-productive way) and mechanical operations (including the construction of mortar stone dams, gabions, dry land, etc.) have been proposed.
_||_