Analysis of the Correlation between Soil Erosion Dynamics and Land Utilization in Eastern Mountainous Areas at County Level

Based on GIS and RS technologies and the establishment of geoscience database in Qixia city of Shandong province,the soil erosion conditions in this city in 1987 and 2003 were quantificationally studied and the correlation between soil erosion changes and land utilization structure was analyzed by using universal soil erosion equation.The results showed that the soil erosion conditions in Qixia city were obviously improved.The soil erosion modulus decreased from 4 312.63 t/km2 in 1987 to 2 481.10 t/km2 in 2003.Soil erosion was inclined from the southeast-northwest watershed with the trunks of Mountain Ya in the east and Mount Ai in the northwest toward the southwest and northeast.The average soil erosion intensity was gradually reduced.Forest land and garden plots were main types of reducing soil and water loss in Qixia city.The restriction effect of grassland on soil erosion was more obvious.Slope farmland and unutilized land were the keys for controlling soil erosion.Because soil erosion in local regions were enhanced,it was necessary to optimize the future land utilization pattern.