LAUSR

Abstract The biocontrol measurement is the most effective method for land desertification control in arid and semi-arid areas where is limited by water and poor soil, and thus. Optimizations are needed for the existing biocontrol methods for anti-desertification and soil-erosion control so that the scope and scale of the biocontrol can be reduced. The premise for the optimization work is to reveal the distribution law of airflow fields around vegetation. Current studies are lack of the spatial express of airflow speed on a 2-D surface and there is no report on the transition of airflow fields from single plant to multiple plants. Based on detail experiments in a wind tunnel for the airflow fields around a single plant, a single-row forest belt with different plant spacing, a multi-row forest belt with different numbers of rows but the same plant spacing, and a double-row forest belt with various arrangements, this paper developed the horizontal model (Eq. (9)) for the airflow fields around single plant comprehensively analyzing the effect of plants characteristic parameters (such as crown width (W), height (H), porosity (β) etc.) on the horizontal and vertical air flow field partition around single plants and proposed a transition model (Eqs. (13) or 14) for airflow fields from single plant to multiple plants. These researches lay the theoretical foundations for optimum biocontrol plant configurations to address anti-desertification and soil erosion control.