HOMEWORK:FloodPredictionAndModeling

Written on July 7, 2026 July 7th, 2026 by RashardKelly @nasa-jpl

by RashardKelly @nasa-jpl

tags: 7 July 2026

raw.githubusercontent.com/ra5hard/ra5hard.github.io/refs/heads/master/_posts/2026-07-07-FloodPredictionAndModeling.md image

Excercise1 Question 14

@nasa-jpl @nasa-openscapes Question: Which product shows maximum flooded area in South Sudan, and which product has maximum insufficient data to detect floods? - 3-day: 10.5067/MODIS/MCDWD_L3_F3_NRT.061 @podaac Flood 3 Day Window // @nbcnews youtube.com/watch?v=Z3jdNseZGjE worldview.earthdata.nasa.gov/?v=29.50696633282299,6.159819418469158,31.660053968216708,7.785831200718493&as=2026-05-15-T00%3A00%3A00Z&ae=2026-05-30-T00%3A00%3A00Z&l=Reference_Labels_15m,Reference_Features_15m,Coastlines_15m,MODIS_Combined_Flood_3-Day(disabled=4),MODIS_Combined_Flood_2-Day(hidden),VIIRS_Combined_Flood_3-Day(hidden),VIIRS_Combined_Flood_2-Day(hidden,disabled=4),OCI_PACE_True_Color,VIIRS_NOAA21_CorrectedReflectance_TrueColor,VIIRS_NOAA20_CorrectedReflectance_TrueColor,VIIRS_SNPP_CorrectedReflectance_TrueColor,MODIS_Aqua_CorrectedReflectance_TrueColor,MODIS_Terra_CorrectedReflectance_TrueColor&lg=true&al=true&ab=on&s=30.3438,7.2635&t=2026-05-15-T17%3A50%3A18Z earthdata.nasa.gov/s3fs-public/2026-06/ARSET-Floods2026-part1-exercise.pdf

image @blackgirlscode @whitehouse

Excercise 2

  1. Consider the following questions:

a) Which product shows more flooded area: Does DSWx-S1 or DSWx-HLS? Why? - DSWx-S1 @podaac

@doug-newman-nasa @podaac @la-county-isd @blackgirlscode @howard-university-web-services @nasa-jpl From what i can tell there is more water displayed on OPERA_L3_DSWX-S1_V1 because it is been in orbit longer, and while im not sure it may also be because the newer product on Sentinel2 is a harmonized prodect and making comparisons so the appeearance of accurate data may take longer @esa @esa @nasa-jpl en.wikipedia.org/wiki/Sentinel-2 @esa @nasa-pds @blackgirlscode sentiwiki.copernicus.eu/web/sentiwiki

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b) What does dark blue color indicate in both the products? - Open Water

https://i.sstatic.net/rk2E1.png Mask Sentinel-2 image using SCL product in Google Earth Engine OPERA Project Science Team Calibration and Validation Guides and Notebooks @virtiserv @blackgirlscode + Binder

go.nasa.gov/44lQG08

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We acknowledge the use of imagery from the NASA Worldview application (https://worldview.earthdata.nasa.gov), part of the NASA Earth Science Data and Information System (ESDIS).

https://podaac.jpl.nasa.gov/Podaac/thumbnails/OPERA_L3_DSWX-HLS_PROVISIONAL_V0.png @nasa-jpl @nasa-openscapes @doug-newman-nasa @nasa-jpl earthdata.nasa.gov/s3fs-public/2026-06/ARSET-Floods2026-part1-exercise.pdf

worldview.earthdata.nasa.gov/?v=22.301240570525874,-0.5893991424349636,37.82621936515166,17.50074260962591&as=2026-05-15-T00%3A00%3A00Z&ae=2026-05-30-T00%3A00%3A00Z&l=Reference_Labels_15m,Reference_Features_15m,Coastlines_15m,OPERA_L3_Dynamic_Surface_Water_Extent-HLS(disabled=5),OPERA_L3_Dynamic_Surface_Water_Extent-Sentinel-1(disabled=5),MODIS_Combined_Flood_3-Day(disabled=4),MODIS_Combined_Flood_2-Day(hidden,disabled=4),VIIRS_Combined_Flood_3-Day(hidden,disabled=4),VIIRS_Combined_Flood_2-Day(hidden,disabled=4),OCI_PACE_True_Color,VIIRS_NOAA21_CorrectedReflectance_TrueColor,VIIRS_NOAA20_CorrectedReflectance_TrueColor,VIIRS_SNPP_CorrectedReflectance_TrueColor,MODIS_Aqua_CorrectedReflectance_TrueColor,MODIS_Terra_CorrectedReflectance_TrueColor&lg=true&l1=Reference_Labels_15m,Reference_Features_15m,Coastlines_15m,OPERA_L3_Dynamic_Surface_Water_Extent-HLS(disabled=5),OPERA_L3_Dynamic_Surface_Water_Extent-Sentinel-1(disabled=5),MODIS_Combined_Flood_3-Day(disabled=4),MODIS_Combined_Flood_2-Day(hidden,disabled=4),VIIRS_Combined_Flood_3-Day(hidden,disabled=4),VIIRS_Combined_Flood_2-Day(hidden,disabled=4),OCI_PACE_True_Color,VIIRS_NOAA21_CorrectedReflectance_TrueColor,VIIRS_NOAA20_CorrectedReflectance_TrueColor,VIIRS_SNPP_CorrectedReflectance_TrueColor,MODIS_Aqua_CorrectedReflectance_TrueColor,MODIS_Terra_CorrectedReflectance_TrueColor&lg1=true&ca=false&cv=68&al=true&ab=on&s=30.3438,7.2635&t=2026-05-15-T17%3A50%3A18Z&t1=2026-05-31-T17%3A50%3A18Z

@blackgirlscode later Species Distribution Modeling with Google Earth Engine . PDF

Exercise 3

  1. Consider the following questions:

By looking at the time series of discharge could we predict that the area around this river is likely to continue flooding between June 15 and June 30, 2026? - yes Why? BEcause the discharge slope does not decline until the firts week of july /// DSWx from Harmonized Landsat Sentinel-2 (DSWx-HLS)

@doug-newman-nasa @podaac @la-county-isd @blackgirlscode @howard-university-web-services @nasa-jpl

Sentinel2 @esa @nasa-jpl en.wikipedia.org/wiki/Sentinel-2 @esa @nasa-pds @blackgirlscode sentiwiki.copernicus.eu/web/sentiwiki

newplot

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earthdata.nasa.gov/s3fs-public/2026-06/ARSET-Floods2026-part3-exercise.pdf @doug-newman-nasa @spaceexplorationtechnologies @nasa @nasa-pds

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earthdata.nasa.gov/s3fs-public/2026-06/ARSET-Floods2026-part3-exercise_0.pdf @la-county-isd @CityOfLosangeles @blackgirlscode @fema

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https://hydroviewer.geoglows.org/#lon=-117.59&lat=35.87&zoom=7.07&definition=

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nasaevents.webex.com/webappng/sites/nasaevents/webinar/webinarSeries/register/c650981ca52044aa950d0a12c1d7df25 @webex image

https://www.esa.int/eologos/images/sentinel-2.jpg https://en.wikipedia.org/wiki/Sentinel-1

https://www.esa.int/var/esa/storage/images/applications/observing_the_earth/copernicus/sentinel-2/19729272-16-eng-GB/Sentinel-2_pillars.png

https://sentiwiki.copernicus.eu/__attachments/a_d55a34c32769e1f1934d1e5dbd8c349f82dfd698d308c4f4def0512e455b5f56/image-20231021-065335.png?cb=29ac5f301b6cfac113042b851e0746fd

@esa @nasa-pds @blackgirlscode sentiwiki.copernicus.eu/web/sentiwiki

https://www.esa.int/var/esa/storage/images/esa_multimedia/images/2024/06/sentinel-1_patch/26187920-1-eng-GB/Sentinel-1_patch.png

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