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一、崩岗侵蚀概况崩岗是水土流失的面状侵蚀、沟状侵蚀逐步发展而成为最为严重的土壤侵蚀类型。福建省的崩岗主要发生在花岗岩地区,尤以安溪县官桥镇为甚。据1986年调查,全镇崩岗发育达702处,面积4858.7亩,占总山地面积92059亩的5.3％,其中活动崩岗417处,面积3387.1亩,基本稳定崩岗203处,面积1102.0亩,稳定崩岗仅82处,面积369.6亩。由于剧烈的崩岗侵蚀,地貌变形,沟壑纵横,地表支离破碎。每逢暴雨,大量的泥沙随着径流下泄,沿途挂淤河床,淤积山塘水库,或冲毁、埋压农田,危及工农业生产和
First, the collapse of gang erosion Overview Collapse erosion is a surface erosion of soil and water erosion, trench erosion gradually developed and become the most serious type of soil erosion. Collapse in Fujian Province occurs mainly in the granite area, especially in Anqiao County, Qiaqiao. According to the survey conducted in 1986, the town has a total area of 702 hectares collapsed, covering an area of 4858.7 mu, accounting for 5.3% of the total mountainous area of 92059 mu, of which 417 are in active collapse, with an area of 3387.1 mu and 203 stable collapse areas with an area of 1102.0 mu, The collapse of only 82 stable, an area of 369.6 acres. As a result of violent collapsing erosion, topography deformation, ravines, surface fragmentation. During heavy rains, a large amount of sediment discharges along runoffs, silt up river beds along the road, silt pond reservoirs, or destroy and burial farmland, endangering industrial and agricultural production and