Study on the Benefits of Windbreak and Sand Fixation in Different Configurations of Mechanical Sand Barriers and Sand Control Plants
Mechanical sand barriers and plant sand control play an important role in controlling desertification land,fixing and activated sand dunes and reducing desertification hazards.In order to understand the benefits of windbreak and sand fix-ation in different configurations of mechanical sand barriers and sand control plants,the desertification land of Gaochang Dis-trict in Turpan City was taken as the research object,and four different treatment modes were set in the study area.The plant preservation rate,windbreak efficiency,surface roughness,wind speed profile,sediment transport amount,surface ero-sion depth and other windbreak and sand fixation benefit indexes of different treatment modes were analyzed through field experiments,and the treatment effects of activated sand dunes with different configuration modes were compared.The re-sults showed as the following three aspects.(1)The mechanical sand barriers played a good role in protecting the growth of sand control plants,and the plant survival rate was greater than 80％;the protective effect of grass checkered sand barriers on plants was greater than that of high vertical sand barriers in the early stage,and the growth of Haloxylon ammodendron was weaker than that of Tamarix chinensis under the same sand barrier protection in the early stage.(2)The four treat-ment modes all had good windbreak benefits,and the windbreak efficiency of grass checkered sand barriers below 0.4 m was better than that of high vertical sand barriers,the windbreak efficiency of high vertical sand barriers over 0.4 m was better than that of grass checkered sand barriers,and the windbreak efficiency of Tamarix chinensis under the same protection conditions was better than that of Haloxylon ammodendron;the surface roughness of grass checkered sand barriers was greater than that of high vertical sand barriers,and the windbreak efficiency of Tamarix chinensis was better than that of Haloxylon ammodendron.(3)The sand blocking benefits of grass checkered sand barriers below 0.4 m was better than that of high vertical sand barriers,but the overall sand blocking benefits was weaker than that of high vertical sand barriers,and in the same sand barriers,the benefits of Tamarix chinensis was better than that of Haloxylon ammodendron;and the four treatment modes had a good fixation effect on the ground surface,and the grass checkered sand barrier was better than the high vertical sand barriers,and the sand surface morphology was more stable,and the fixation effect of Tamarix chinen-sis on soil was better than that of Haloxylon ammodendron.The treatment mode of grass checkered sand barriers and Tamarix chinensis has the best benefit of windbreak and sand fixation.
mechanical sand barrierssand control plantswindbreak efficiencytreatment benefits
万方数据
维普
