Study On Sand Dune Morphological And Migrational Character Based On The Deflector

In this paper,the use.of geographic information system and RTK technology to measure the dune form,with the Ministry of Water Resources and the Institute of Water Resources in Inner Mongolia Autonomous Region Bayannaoer City Dengkou County twenty Lili wind erosion observation field for the study area around the sand dunes for the study Based on the field investigation,field observation and experimental analysis,the experimental dune was selected,the study area was fixed by using the boundary pile,and the wind control measures were set up.The diversion plate was used to quantitatively investigate the morphological characteristics of the dune,the characteristics of the dune,this paper studies the influence of wind control on the morphological characteristics of sand dunes and uses the diversion plate to study the effects of desertification and geology and geomorphology in the future.It can be used for the comprehensive monitoring and evaluation of the sandy landforms in this area.,Governance to provide theoretical basis.The main conclusions are as follows:(1)Based on the RTK technology,the use of differential GPS data,the spatial difference generated DEM,can effectively extract the dune topography and morphological parameters,and quantitative research and Analysis on dynamic changes of aeolian landform features to achieve set.(2)The study area mainly show the Pyramid dunes,dune height 5.30?7.19m,width 54.02?60.76m,length 35.26?65.73m,volume 5374.25?9376.23m3,mainly distributed in the slope between 5?35° can reach the dunes natural angle of repose.The slope of the East and the south side of the Pyramid dune is steep,and it is consistent with the characteristics of the Northwest wind.(3)The deflector has the ability of collecting wind energy,increasing the wind erosion intensity of sand dune,dredging sand dunes and changing the shape of sand dunes.After the guide plate was set up in the main wind direction,the volume of sand dune was reduced by 7.3%,the surface area was reduced by a factor of 5.8%,and the dune height was reduced by 0.35m.In the installation of deflector position,and the rear side guide plate erecting parts appear blowout.(4)The deflector has the ability to reduce the wind speed,hinder the movement of sand flow and accumulate the sand material.The erection of guide plate in the sand dunes on the leeward side,guide plate block from the main direction of wind sand flow,sediment diversion plate barrier material is gradually accumulated in the sand dunes of the southeast.(5)Control speed is the height of sand dunes,wind force,sand material and other factors,the deflector intervention of dune moving speed and distance.