蒋家沟泥石流堆积扇区变迁及整治

蒋家沟是世界闻名的高频大型泥石流沟。200多年来的泥石流活动及人为减灾影响，造成其堆积扇及其相邻的沟域和小江河床的巨变。沟内7.48亿m³松散物质及年235万t的补给量必将在今后长期控制影响小江河床，危害400多hm²农田及公路。通过泥石流及人为活动影响历史分析研究，掌握河流及堆积地貌发展变化趋势，为其近期整治提供合理措施方案及长期人为积极活动影响提供方向。

Evolution and Control of Alluvial Fan of the Jiangjiagou Debris Flow in Dongchuan,Kunming

Jiangjiagou is a large-scale debris flow ditch with high frequency,and it is well-known in the world.After more than 200 year’s movement of debris flow and artificial influence,the sector has been piled,and the great change has taken place in the neighboring ditch region and Xiaojiang riverbed.Xiaojiang riverbed must be controlled and influenced by the incompact matters of 748 000 000 m³ and the supply quantity of 2 350 000 tons per year in the future,which is a threat to 400 hm² farmland and highway.It provides reasonable measures for harnssing and gives the direction for artificial positive activity for a long time on the basis of the analysis and research of the debris flow,grasping the developing trend of the flow and the physiognomy of piled sector.