雅丹地貌通常被认为是风蚀地貌的典型代表，历经百余年的研究，在很多方面都取得了进展，但对其与风水等外营力之间的互馈机理仍缺乏定量研究。项目申请者将以甘肃敦煌雅丹国家地质公园区内已建立的观测基地为平台，通过对雅丹地貌侵蚀速率和风况、降水的实地观测，实验模拟和数值模拟，以揭示雅丹地貌狭管效应下的风沙运动规律和地表蚀积过程，建立雅丹地貌侵蚀的定量模型。这对深入认识雅丹地貌的形成发育过程具有重要的理论意义，同时对保护雅丹地貌等地质遗迹和开发干旱区旅游资源，防治干旱地区风蚀灾害等具有重要的实践意义。

Yardang landform is always known as one of the typical wind erosion landforms. During the past about hundred years, although many progress had made, including definition, distribution, classification, formation and evolution condition, evolution process, ages, the quantitative feedback mechanism among yardangs, wind and water isn't clearly. Based on the observation base in the National Yardang Landform Geo-park, Dunhuang, the applicant will use field observation, experimental simulation and numerical simulation on yardangs erosion rate, wind regieme and precipitation to reveal the aeolian-sand transport law and surface erosion-deposition process under narrow pipe effect and establish quantitative models for yardang erosion. this research also has important significance both theoretical and practical,including deeply understanging the yardang process, geological relics conservation, tourism resource development, aeolian erosion hazard reduction in arid regions