基于DOMAIN模型的干热河谷稀树灌木草丛空间分布

Spatial Distribution of Savanna Shrub & Grass in Dry-hot Valley on the Base of the DOMAIN Model

以温度、DEM(数字高程模型)、NDVI(归一化植被指数)3个因子为参数,运用DOMAIN模型对元江县干热河谷稀树灌木草丛空间分布进行模拟,实现了其空间分布的可视化表达。模拟结果表明:稀树灌木草丛群落主要分布于除元江县城外的河谷两侧,其中北部分布较为集中,南部较为分散。在自然条件及人为因素双重干扰下,元江县干热区域的面积呈现出扩大趋势,尤其是元江北部龙潭乡以北、青龙厂镇以南的地区存在更高的演化风险,建议将上述区域及元江国家级自然保护区章巴片区列为重点森林保护区域。

Taking temperature,DEM and NDVI as the parameters,using the DOMAIN model,we simulate the Spatial Distribution of Savanna shrub grass in Dry-hot Valley of Yuan Jiang and realize visualization of the spatial data. The simulation results show： Savanna shrub grass is mainly distributed in the both sides of the valley,which is concentrated in the northern and dispersed in the northern. Dry-hot areas present the tendency of expansion under the general influence of natural and artificial factors,espesially for those areas with higher evolution risks,such as the north of Long Tan township,the south of Qing Longchangtownship. We suggest that deserve high priority in these regions and Zhang Ba District of Yuan Jiang National Nature Reserve.