关键词: 灌木林结构, 防风效应, 均匀配置

Abstract: It is an effective method for controlling wind and fixing moving sand to establish shrub forest, and construction and configuration of windbreak forest is a key study aspect for enhancing function of windbreak shrub forest. Two types of windbreak shrub forest with equal spacing in the rows and between rows were established to observe wind velocity in forest and in front of forest and compare the wind break effect of forest configuration. The results showed that the cutdown ratio of wind velocity of simulated shrub forest without leaf with upwind projected area of 0.25 m² was less by 10%-20% than simulated shrub forest with leaves with upwind projected area of 0.39 m² at the wind velocity of 4.6-10.7 m·s^-1 with equal spacing in the rows and between rows. The wind velocity of two types of simulated shrub forest had exponent function relationship with height change, while that there was well fitting for the exponent function relationship over shifting sandy land. The roughness of simulated shrub forest was five times that of shifting sandy land, but it was different at different wind velocity. The windbreak efficienly can be increased by optimal configuration of shrub forest with equal spacing in the rows and between rows.

Key words: structure of shrub forest, windbreak efficiency, equal configuration