USDA/NASS Disaster Analysis Web Page https://www.nass.usda.gov/Research_and_Science/Disaster-Analysis/index.php Metadata Event: Hurricane Harvey Last Updated: October 1, 2018 ------------------------------------------------------------------------- ------------------------------------------------------------------------- File: Hurricane_Harvey_Inundation_Layer.zip Description: This dataset is a 2018 inundation raster layer created to estimate the extent of cropland and pasture/hay inundated by flooding from Hurricane Harvey. The study area consisted of coastal Texas and Louisiana, United States of America. Data represent cropland, inundated cropland, pasture/hay, inundated pasture/hay, water bodies, and other land. Projection: Albers Conical Equal Area Spatial Resolution: 30 meter Attribute Table Value Class_Name 1 Water 2 Other 10 Cropland 11 Inundated Cropland 20 Pasture Hay 21 Inundated Pasture Hay -------------------- Imagery Inputs Sentinel-1A Data: interferometric wide swath (250 kilometer), Level-1 Ground Range Detected (GRD), 5x20 meter spatial resolution, and dual polarization (VV, VH) Imagery Download: Copernicus Open Access Hub https://scihub.copernicus.eu/dhus/ Pre-Flood Imagery Input Files: S1A_IW_GRDH_1SDV_20170822T003447_20170822T003512_018029_01E43E_A67D S1A_IW_GRDH_1SDV_20170822T003422_20170822T003447_018029_01E43E_B64C S1A_IW_GRDH_1SDV_20170805T002644_20170805T002710_017781_01DCB4_8FDF S1A_IW_GRDH_1SDV_20170805T002619_20170805T002644_017781_01DCB4_1716 S1A_IW_GRDH_1SDV_20170731T001848_20170731T001913_017708_01DA7E_A3E6 S1A_IW_GRDH_1SDV_20170731T001823_20170731T001848_017708_01DA7E_C4E8 S1A_IW_GRDH_1SDV_20170819T001029_20170819T001054_017985_01E2E8_F302 S1A_IW_GRDH_1SDV_20170819T001004_20170819T001029_017985_01E2E8_5C42 Post-Flood Imagery Inputs: S1A_IW_GRDH_1SDV_20170903T003448_20170903T003513_018204_01E981_8AD2 S1A_IW_GRDH_1SDV_20170903T003423_20170903T003448_018204_01E981_5E4B S1A_IW_GRDH_1SDV_20170829T002645_20170829T002710_018131_01E74D_3220 S1A_IW_GRDH_1SDV_20170829T002620_20170829T002645_018131_01E74D_D734 S1A_IW_GRDH_1SDV_20170905T001849_20170905T001914_018233_01EA6C_B11B S1A_IW_GRDH_1SDV_20170905T001824_20170905T001849_018233_01EA6C_C7C1 S1A_IW_GRDH_1SDV_20170831T001029_20170831T001054_018160_01E82D_0776 S1A_IW_GRDH_1SDV_20170831T001004_20170831T001029_018160_01E82D_9366 -------------------- Land Cover Inputs NASS 2017 Cultivated Layer (planted acres) Obtained From: https://www.nass.usda.gov/Research_and_Science/Cropland/Release/index.php NASS 2017 Cropland Data Layer (planted acres) Obtained From: CropScape: https://nassgeodata.gmu.edu/CropScape/ Disclaimer: These data are not official NASS estimates. -------------------- Processing Software Sentinel Application Platform (SNAP) Toolbox 6.0 http://step.esa.int/main/download/ Hexagon ERDAS Imagine 2016 http://www.hexagongeospatial.com/ Esri ArcGIS 10.3.1 http://www.esri.com/ -------------------- Methodology Boryan, C., Z. Yang, A. Sandborn, P. Willis, and B. Haack (2018). Operational Agricultural Flood Monitoring With Sentinel-1 Synthetic Aperature Radar. IGARSS 2018, Valenca Spain, July 22-27, 2018. Posted 08/09/2018 https://www.nass.usda.gov/Research_and_Science/Cropland/docs/Boryan_IGARSS2018%20_Flood.pdf ------------------------------------------------------------------------- ------------------------------------------------------------------------- File: Hurricane_Harvey_Flood_Assessment_Report.pdf Description: The Assessment Report provides a brief overview of the disaster event and the analysis that USDA/NASS conducted to estimate the extent of cropland and pasture/hay inundated by flooding from Hurricane Harvey. The report provides an overview of the raster data created with select zooms of affected cropland and pasture/hay. Percentages are defined from the NASS Final Crop Inundation Layer. ------------------------------------------------------------------------- -------------------------------------------------------------------------