GF-1和Landsat 8 OLI遥感影像在草地资源调查中的应用——以甘南州天然草地为例  

Application of GF-1 and Landsat 8 OLI remote sensing images ingrassland resources survey:a case study of natural grassland in Gannan

作　　者：苏浩[1,2] SU Hao(Basic Geographic Information Center of Gansu Province,Lanzhou Gansu 730099,China;Natural Resources Satellite Application Technology Centerof Gansu Province,Lanzhou Gansu 730099,China)

机构地区：[1]甘肃省基础地理信息中心,甘肃兰州730099 [2]甘肃省自然资源卫星应用技术中心,甘肃兰州730099

出　　处：《河北省科学院学报》2023年第3期53-60,共8页Journal of The Hebei Academy of Sciences

基　　金：甘肃省自然资源厅专项资助(GSDJ-2019-01)。

摘　　要：以甘南州天然草地为研究对象,利用高空间分辨率遥感影像(GF-1)数据,提取了甘南州天然草地空间分布数据;结合地形数据和行政区划单元数据分析了不同类型天然草地的空间分布特征;利用Landsat 8 OLI数据和草地盖度、草地地上生物量实测数据构建了甘南州草地盖度、草地地上生物量遥感反演模型,并分析了2019年甘南州草地的生长状况。结果表明:①全州天然草地面积为1995740.04 hm^(2),草地地上生物量为2250.28 kg/hm^(2),草地盖度为93.11%。②高寒草甸和山地草甸分别占63.69%和28.31%,二者分别集中分布于海拔3500~5000 m,和3000~3500 m。研究结果为甘南州草地调查、日常监管提供了数据与理论支持。Taking natural grassland in Gannan Prefecture as the research object,the spatial distribution data of natural grassland in Gannan Prefecture was extracted for the first time using high resolution remote sensing image(GF-1)data.The spatial distribution characteristics of different types of natural grassland were analyzed by combining topographic data and administrative division unit data.The remote sensing inversion model of grassland coverage and above-ground biomass in Gannan Prefecture was constructed by using Landsat 8 OLI data and measured data of grassland coverage and above-ground biomass.The growth status of grassland in Gannan in 2019 was analyzed.The results showed that:①the natural grassland area is 1995740.04 hm^(2),the aboveground biomass is 2250.28 kg/hm^(2),and the grassland coverage is 93.11%.②Alpine meadow and mountain meadow account for 63.69%and 28.31%of the total area,respectively.Alpine meadow is mainly distributed at an altitude of 3500~5000 m,and mountainous meadow is mainly distributed at an altitude of 3000~3500 m.The results provide data and theoretical support for investigation and daily supervision of grassland in Gannan Prefecture.

关 键 词：高空间分辨率遥感影像 空间分布特征 地上生物量 草地盖度 

分 类 号：S812[农业科学—草业科学] S127[农业科学—畜牧学]