阿什河流域绿色河流廊道景观格局解析及功能评价

Analysis and Evaluation of Green River Corridor Landscape Pattern in Ashihe River Basin

以阿什河为例,利用Landsat 8 OLI卫星影像对阿什河流域绿色河流廊道景观格局进行解析,同时采用综合评价法对绿色河流廊道质量进行评价,并结合R语言对绿色河流廊道质量与环境因子进行相关性分析,找出限制绿色河流廊道功能提升的瓶颈因素。结果显示,阿什河流域内的绿色河流廊道呈现出明显的空间异质性,在中上游的丘陵地区,绿色廊道分布密集、面积广泛、空间连续性高,中下游绿色河流廊道缺失、离散破碎化程度高、面积明显不足。流域中下游现有的绿色河流廊道的空间格局状况与其功能需求不匹配,限制阿什河流域中下游绿色廊道功能低下的主要原因为廊道宽度不够、面积不足、空间连接度差,绿色河流廊道功能质量急需提升。

This paper introduced a case study based on the Ashe River, used Landsat 8 satellite image to interpret the landscape pattern of the green river corridor, applied the comprehensive evaluation method to evaluate the quality of the green fiver corridor, and analyzed the correlation by R language The green river corridor in the Ashihe River Basin has demonstrated strong spatial heterogeneity, in the upper reaches in the highland region, green corridor areas were extensively and intensively distributed river corridor in the middle and lower basin could not match current functional requirements. The green fiver corridor function in the lower reaches of the Ashihe River Watershed was limited by the insufficient width and area, and the poor spatial connectivity. The green river corridor function is in need of immediate improvement.