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在2015-2021年,为中国最大的温带草原草提供1000万年放牧强度数据集

Chuchen Chang¹, Jie Wang², Yanbo Zhao¹

¹College of Grassland Science and Technology, China Agricultural University, Beijing, 100193, China.

Scientific data

|February 10, 2024

概括

这项研究引入了一种新的基于卫星的方法,用于绘制中国Hulun Buir草原的牧场强度 (GI) 地图. 高分辨率地图为可持续的草原管理提供了关键数据.

科学领域:

遥感遥感遥感遥感
生态生态学生态生态学
地理空间分析是什么

背景情况:

准确地绘制牧场强度 (GI) 是有效的草原管理和保护的必要条件.
基于卫星的监测提供了一个可扩展的解决方案,用于评估大面积的草原状况.

研究的目的:

开发和验证一个新的框架,用于制作高分辨率的年度放牧强度地图.
为适应性草原利用战略提供详细的放牧梯度信息.

主要方法:

使用配对采样策略和随机森林算法与协调的Landsat 7/8和Sentinel-2图像.
从2015-2021年以10米分辨率生成年度放牧概率 (GP) 地图.
使用决策树将GP数据分为未放牧,中度放牧和大量放牧等级.

主要成果:

在每年的地理标志地图中,总体准确度大于0.97.
在城市 (r=0.51) 和县 (r=0.75) 尺度上展示了地图数据和统计数据之间的显著相关性.
有效地捕获了在场地层面上的细度放牧强度梯度 (r=0.94).

结论:

拟议的监测方法提供了有价值的年度10米牧场信息.
该框架通过数据驱动的适应性战略支持可持续的草原管理.
草地强度的高分辨率卫星绘图是可行的和准确的.

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