中国科学数据（中英文网络版）2025，Vol.10Issue(4)：138-151,14.DOI:10.11922/11-6035.csd.2025.0110.zh
2000-2024年渭河流域MPDI逐年500m数据集
A dataset of 500 m annual MPDI data for the Weihe River Basin from 2000 to 2024
摘要
Abstract
Drought,as one of the primary meteorological disasters affecting agricultural production and ecological security,holds significant importance for regional water resource management through long-term dynamic monitoring.To address the practical needs of drought monitoring in the Wei River Basin,an improved vertical drought index(Modified Perpendicular Drought Index,MPDI)dataset,based on the traditional Perpendicular Drought Index(PDI),was constructed spanning a long-term time series from 2000 to 2024,using the Google Earth Engine(GEE)platform.This dataset is based on the MOD09A1 surface reflectance product and has undergone standard preprocessing procedures,including cloud masking and projection transformation.It combines the calculation of the normalized difference vegetation index(NDVI)and vegetation coverage(fv)parameters,and incorporates a vegetation coverage factor into the traditional perpendicular drought index(PDI)model to generate annual drought monitoring products with a spatial resolution of 500 m.To ensure data accuracy and consistency,this study implemented strict quality control measures during the dataset construction process,including cloud cover screening and filling,soil line equation fitting(R2≥0.85),and correlation analysis with measured soil moisture observations.This dataset provides a reliable basis for assessing the frequency,intensity,and spatial expansion trends of drought events in the Wei River Basin,and can provide strong support for regional drought dynamic monitoring,refined water resource management,disaster risk assessment and related research.关键词
渭河流域/改进型垂直干旱指数(MPDI)/GEE平台/MOD09A1/干旱监测Key words
Weihe River Basin/Modified Perpendicular Drought Index(MPDI)/GEE platform/MOD09A1/drought monitoring引用本文复制引用
田琛琛,康亚琴,冯克庭..2000-2024年渭河流域MPDI逐年500m数据集[J].中国科学数据（中英文网络版）,2025,10(4):138-151,14.基金项目
黄土科学全国重点实验室自主部署项目(E452840100) The Independent Deployment Project of the State Key Laboratory of Loess Science(E452840100) （E452840100）
