Predicted biomass of fine fuel for Altar Valley, Arizona, 2021

These data were compiled for the Altar Valley Conservation Alliance and the U. S. Fish and Wildlife Service to identify and quantify the spatial distribution of fine fuels in relation to wildfire management across jurisdictional boundaries. Objective(s) of our study were to map the 2021 annual distribution of the biomass (kg/ha) of fine fuels (grasses, shrubs, and forbs) for the whole of the Altar Valley, AZ, including the Buenos Aires National Wildlife Refuge. These data represent estimated biomass of fine fuels (kg/ha) at a 10-m resolution. These data were collected/created in September through October 2021 for the Altar Valley, located in Pima County, AZ, USA. These data were collected/created by the U.S. Geological Survey, Southwest Biological Science Center, based on destructive field sampling of vegetation biomass (clipped, dried, & weighed), modeling of non-destructively sampled vegetation biomass (height & cover) to destructively sampled vegetation, and linking estimates of biomass to remotely sensed data from the Sentinel-2 by application of machine learning techniques (random forest). These data can be used to understand the distribution and abundance of fine fuels in the Altar Valley for research and management.

本数据集由祭坛谷保护联盟（Altar Valley Conservation Alliance）与美国鱼类及野生动物管理局（U. S. Fish and Wildlife Service）委托编制，旨在识别并量化跨管辖边界下与野火管理相关的精细燃料（fine fuels）空间分布格局。本研究的核心目标为绘制美国亚利桑那州祭坛谷全域（含布宜诺斯艾利斯国家野生动物保护区（Buenos Aires National Wildlife Refuge））2021年度精细燃料（禾草、灌木及杂类草）生物量（千克/公顷）的空间分布地图。本数据集以10米空间分辨率呈现精细燃料生物量（千克/公顷）的估算结果。该数据集于2021年9月至10月期间，针对美国亚利桑那州皮马县境内的祭坛谷完成采集与制作。数据集由美国地质调查局（U.S. Geological Survey）西南生物科学中心完成制作，其技术路径包括：对植被生物量开展破坏性野外采样（剪取、烘干并称重）；将基于高度与覆盖度的非破坏性植被生物量采样结果建模关联至破坏性采样样本；通过机器学习技术与随机森林（random forest）算法，将生物量估算结果与哨兵-2（Sentinel-2）遥感数据进行关联匹配。本数据集可用于科研与管理场景中，解析祭坛谷内精细燃料的空间分布与丰度特征。