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Beijing Forestry University (2019)

Experimental Study on Prevention and Control of Wind Erosion and Dust Emission by Biological Soil Crust in Bashang Area

王渝淞;

Titre : Experimental Study on Prevention and Control of Wind Erosion and Dust Emission by Biological Soil Crust in Bashang Area

Auteur : 王渝淞;

Grade : Master’s Theses 2019

Université : Beijing Forestry University

Résumé partiel
The Bashang area in Hebei Province is affected by the strong winds of spring and autumn.The problem of soil wind erosion and dust enission is particularly serious.In recent years,the area mainly relies on the construction of shelter forests to control related problems.Few studies have affected the effects of soil crust on soil wind erosion and dust emission.In this study,the biological soil crust was taken as the research object,and the single-factor experimental design method was used to carry out artificial cultivation of biological crust,wind tunnel experiment and field wind erosion dust verification.The results showed that :(1)The coverage and thickness of algae crust and moss crust were positively correlated with culture time.The optimal measures for short-term rapid culture of algae crust and moss crust were:2 days watering+nutrient solution treatment ;long-term culture The optimal measures were 2 days of watering+no nutrient solution treatment ;nutrient solution had the greatest effect on biological crust development within 30-60 days of culture period,and water had the greatest effect on biological crust development within 60-90 days of culture period.(2)From the aspect of wind protection,in the height range of 0-10cm,the biological crust has the most significant influence on the airflow velocity.In this height range,it shows the bare wind speedAt 10cm,it is expressed as algal crust wind speed

Mots clés : biological soil crust; soil wind erosion; dust emission; wind tunnel experiment;

Présentation (CNKI)

Page publiée le 29 mai 2020