Study on the Collaborative Windbreak Effect and Optimization Configuration Model of Shelterbelt and Natural Vegetation in an Oasis-desert Ecotone in Junggar Basin
An experiment on the collaborative windbreak effect of shelterbelt and natural vegetation was car- ried out at an oasis-desert ecotone in southern edge of Junggar Basin in Xinjiang, China. Consequently an optimization model of collaborative arrangement was established. Results are as follows： （1）The collabora- tive action of shelterbelt and natural vegetation can certainly reduce wind speed. For sparse-structure shel- terbelt, the collaborative effect is obvious, and the wind speed reduction ratio follows an order of： that in the natural vegetation〉between natural vegetation and shelterbelt〉exterior of shelterbelts. For dense- structure shelterbelt, the collaborative effect is relative weak under low wind speed, and the wind speed re- duction ratio follows an order of： that between natural vegetation and shelterbelt〉in natural vegetation 〉 exterior of shelterbelt. （2）The collaborative arrangement model of shelterbelt and natural vegetation shows that there is a significant correlation between the relative wind speed（at 0.5 m and 1.5 m heights）and the crown volume of shelterbelt（V）, the breast height area of shelterbelt per unit length（S）, the spacing of shelterbelt（Q）, the average height of natural vegetation （H）, the coverage of natural vegetation （C）. Through Matlab 7.0 software programming, an optimal collaborative arrangement model is obtained for the smallest relative wind speed regime. When V = 62. 1476 m3, S = 0. 5756 m2/50m, Q= 5. 5645 m2, H = 1. 6889 m, and C=0. 2878, the collaborative windbreak effect can reach 85.07% at 0.5 m height; When V =62. 1476 m3, S=0.5237 mE/50m, Q=5.5645 m2, H=1.8154 m, and C=0.3073, the collaborative windbreak effect can reach 74.67 % at 1.5 m height. The optimal collaborative arrangement models under different relative wind
shelterbeltspeed are predicted by this program. natural vegetationwindbreak effectoptimal collaborative arrangement model
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万方数据
维普
