IMERG and LHASA Global Landslide Exposure Maps 1.0

The Landslide Hazard Assessment for Situational Awareness (LHASA) model identifies locations with high potential for landslide occurrence at a daily temporal resolution. LHASA combines satellite‐based precipitation estimates with a landslide susceptibility map derived from information on slope, geology, road networks, fault zones, and forest loss. When rainfall is considered to be extreme and susceptibility values are moderate to very high, a “nowcast” is issued to indicate the times and places where landslides are more probable.

This archive contains GeoTIFF Rasters that are a 16-year average (beginning of 2001 - end of 2016). The spatial coverage is from 72°N to 60°S latitude, and 180°W to 180°E longitude, based on IMERG Ver06B from the aforementioned time interval. The provided global maps of exposure to landslide hazards, are at a 30x30 arc-second resolution. These maps show the estimated exposure of population, roads, and critical infrastructure (hospitals/clinics, schools, fuel stations, power stations & distribution facilities) to landslide hazard, as modeled by the NASA LHASA model.

The data collection consists of eight files, covering the aforementioned spatial and temporal ranges, totaling approximately 20.3 GB (~2.5 GB each):
(1): Landslide hazard (annual average; Units: Nowcasts.yr-1)
(2): Landslide hazard (annual standard deviation; Units: Nowcasts.yr-1)
(3): Population exposure (annual average; Units: Person-Nowcasts. yr-1. km-2)
(4): Population exposure (annual standard deviation; Units: Person-Nowcasts. yr-1. km-2)
(5): Road exposure (annual average; Units: Nowcasts.km.yr-1.km-2)
(6): Road exposure (annual standard deviation; Units: Nowcasts.km.yr-1.km-2)
(7): Critical infrastructure exposure (annual average; Units: Nowcasts.element.yr-1.km-2)
(8): Critical infrastructure exposure (annual standard deviation; Units: Nowcasts.element.yr-1.km-2)

情境感知滑坡危险性评估（Landslide Hazard Assessment for Situational Awareness, LHASA）模型可按日时间分辨率识别具备高滑坡发生潜力的区域。该模型融合了基于卫星的降水估算结果，以及由坡度、地质条件、道路网络、断层带与森林损失信息推导得出的滑坡敏感性地图。当降雨被判定为极端且敏感性分值处于中等至极高区间时，系统将发布临灾预警（nowcast），以指明滑坡发生概率更高的时空位置。

本数据集归档包含2001年初至2016年末共计16年的平均GeoTIFF栅格数据。其空间覆盖范围为北纬72°至南纬60°、西经180°至东经180°，数据来源于该时段内的IMERG Ver06B产品。所提供的全球滑坡灾害暴露度地图分辨率为30弧秒×30弧秒，展示了由NASA LHASA模型模拟得到的人口、道路及关键基础设施（医院/诊所、学校、加油站、发电厂及配电设施）的滑坡灾害暴露度估算结果。

本次数据集合共包含8个文件，覆盖上述时空范围，总容量约20.3 GB（单个文件大小约2.5 GB）：
1. 滑坡危险性（年平均值；单位：临灾预警·年⁻¹）
2. 滑坡危险性（年标准差；单位：临灾预警·年⁻¹）
3. 人口暴露度（年平均值；单位：人·临灾预警·年⁻¹·千米⁻²）
4. 人口暴露度（年标准差；单位：人·临灾预警·年⁻¹·千米⁻²）
5. 道路暴露度（年平均值；单位：临灾预警·千米·年⁻¹·千米⁻²）
6. 道路暴露度（年标准差；单位：临灾预警·千米·年⁻¹·千米⁻²）
7. 关键基础设施暴露度（年平均值；单位：临灾预警·设施单元·年⁻¹·千米⁻²）
8. 关键基础设施暴露度（年标准差；单位：临灾预警·设施单元·年⁻¹·千米⁻²）