摘要
通过3S技术将合作市(甘肃省甘南州)不同类型高寒草甸的遥感影像与地形因子相叠加,分析高寒草甸的空间分布规律。结果表明:研究区海拔主要分布在3057.25~3704.13m范围内,地势陡峭,各坡向面积分布均匀。随海拔增加,高寒灌丛草甸与非高寒灌丛草甸面积所占比例均表现为先增大后减少。随坡度增加,高寒灌丛草甸面积所占比例呈先增大后减少趋势,而非高寒灌丛草甸面积所占比例呈递减趋势。高寒草甸的坡向分布规律性明显,高寒灌丛草甸和非高寒灌丛草甸面积所占比例均以西北-东南轴对称。高寒灌丛草甸以海拔3704.13~3919.75m、坡度25°~35°、西北坡向为最优生境;非高寒灌丛草甸以海拔3488.50~3704.13m、坡度0°~2°、东南坡坡向为最优生境。地形因子是影响研究区高寒草甸空间分布的重要因素,这对未来科学合理地利用高寒草甸,及最大程度地开发草甸生产潜力,具有指导价值。
The remote sensing images of different types of alpine meadows in Hezuo City(Gannan Tibetan Autonomous Prefecture,Gansu Province)were superimposed with topographical factors through 3S technology to analyze the spatial distribution of alpine meadows.The results showed that the altitude of the study area was mainly in the range of 3057.25~3704.13 m with steep terrain and evenly distributed slope towards different directions.With the altitude gradient increasing,the proportion of alpine and non-alpine shrub meadow area both increased first and then decreased.Wiht the slope gradient increasing,the proportion of alpine shrub meadow area increased first and then decreased,while the proportion of non-alpine shrub meadow area decreased.The slope distribution of alpine meadows had obvious regularity.The proportion of alpine shrub meadow area and non-alpine shrub meadow area were symmetrical in the northwest-southeast axis.The optimal habitat for alpine shrub meadows is located at an altitude between 3704.13 m and 3919.75 m with a slope of 25°to 35°towards northwest.The optimal habitat of non-alpine shrub meadow is located at an altitude between 3488.50 m and 3704.13 m with a slope of 0°to 2°towards southeast.Topography is an important factor affecting the spatial distribution of alpine meadow in this area,which has guiding value for the scientific and rational utilization of alpine meadow and for maximum development of alpine meadow production potential in the future.
作者
张起鹏
王建
吕飞
ZHANG Qi-peng;WANG Jian;LV Fei(Department of History and Culture,Gansu Normal College for Nationalities,Hezuo 747000,China;School of Geography,Nanjing Normal University,Nanjing 210023,China;Jining Haida Xingzhi School,Jining 272000,China)
出处
《中国草地学报》
CSCD
北大核心
2021年第5期90-96,114,共8页
Chinese Journal of Grassland
基金
国家自然科学基金(41271204,32060279)
江苏省高校优势学科建设工程资助项目(164320H116)
国家民委民族研究项目(2019-GMD-034)。
关键词
合作市
地形因子
高寒草甸
3S技术
空间分布
Hezuo city
Topographic factor
Alpine meadow
3S technology
Spatial distribution
