---
layout: post
mermaid: true
published: true
title: "HOMEWORK:FloodPredictionAndModeling"
image: virtiservO4wPromises01.jpg
author: "RashardKelly @nasa-jpl"

---


[raw.githubusercontent.com/ra5hard/ra5hard.github.io/refs/heads/master/_posts/2026-07-07-FloodPredictionAndModeling.md](https://raw.githubusercontent.com/ra5hard/ra5hard.github.io/refs/heads/master/_posts/2026-07-07-FloodPredictionAndModeling.md)
<img  alt="image" src="https://github.com/user-attachments/assets/3a30ba85-5413-43f3-a71b-f0209948a010" />


## 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](https://www.earthdata.nasa.gov/data/instruments/viirs/near-real-time-data/nrt-global-flood-products) // [@nbcnews youtube.com/watch?v=Z3jdNseZGjE](https://www.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](https://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](https://www.earthdata.nasa.gov/s3fs-public/2026-06/ARSET-Floods2026-part1-exercise.pdf)

<iframe width="560" height="315" src="https://www.youtube.com/embed/v8FhgV4cBnI?si=6HHrdHq2L3saYhT4" title="YouTube video player" frameborder="0" allow="accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share" referrerpolicy="strict-origin-when-cross-origin" allowfullscreen></iframe>

<img  alt="image @blackgirlscode @whitehouse" src="https://github.com/user-attachments/assets/b5842776-91ae-41e0-bff0-6bea46a8517a" />

[<video controls src="https://archive.org/download/SPACEBEACH/VirtiservMonitoringandPredictingFloodsUsingEarthObservationsExcercise1Recording2026-07-07_115158SPACEBEACH_RexRichardSONKarenBAss.mp4" />](https://archive.org/download/SPACEBEACH/VirtiservMonitoringandPredictingFloodsUsingEarthObservationsExcercise1Recording2026-07-07_115158SPACEBEACH_RexRichardSONKarenBAss.mp4)


# Excercise 2
16. **Consider the following questions:**

>a) Which product shows [more](https://ieeexplore.ieee.org/document/10283397) flooded area:
Does DSWx-S1 or DSWx-HLS? Why? - [DSWx-S1 @podaac](https://podaac.jpl.nasa.gov/dataset/OPERA_L3_DSWX-S1_V1)


>@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](https://www.esa.int/Applications/Observing_the_Earth/Copernicus/Sentinel-2) 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](https://en.wikipedia.org/wiki/Sentinel-2) [@esa @nasa-pds @blackgirlscode sentiwiki.copernicus.eu/web/sentiwiki](https://sentiwiki.copernicus.eu/web/sentiwiki)
>
<img  alt="image" src="https://github.com/user-attachments/assets/c8b7889a-0a24-4c4d-a543-59e767e91eff" />

>b) What does dark blue color indicate in both
the products? - [`Open Water`](https://bastiontechnologies.com/bastion-instrumental-part-of-test-operations-in-preparation-for-the-artemis-ii-mission/)
>
>![https://i.sstatic.net/rk2E1.png](https://i.sstatic.net/rk2E1.png) [Mask Sentinel-2 image using SCL product in Google Earth Engine](https://gis.stackexchange.com/questions/423823/mask-sentinel-2-image-using-scl-product-in-google-earth-engine)
>[OPERA Project Science Team Calibration and Validation Guides and Notebooks @virtiserv @blackgirlscode](https://github.com/OPERA-Cal-Val) + [![Binder](https://mybinder.org/badge_logo.svg)](https://mybinder.org/v2/gh/OPERA-Cal-Val/OPERA_Applications.git/HEAD)


[go.nasa.gov/44lQG08](https://worldview.earthdata.nasa.gov/?v=29.41343539741733,5.687982591775255,31.66829897186212,9.414770999538172&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(hidden,disabled=5),OPERA_L3_Dynamic_Surface_Water_Extent-Sentinel-1(opacity=0.5,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(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%2B29.8803,8.9228&t=2026-05-19-T17%3A50%3A18Z)

<img  alt="image" src="https://github.com/user-attachments/assets/cdefeaad-1f4b-4661-8597-145c932d691f" />

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).

<iframe src="https://worldview.earthdata.nasa.gov/?v=29.41343539741733,5.687982591775255,31.66829897186212,9.414770999538172&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(hidden,disabled=5),OPERA_L3_Dynamic_Surface_Water_Extent-Sentinel-1(opacity=0.5,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(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(disabled=4),VIIRS_Combined_Flood_3-Day(disabled=4),VIIRS_Combined_Flood_2-Day(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=53&al=true&ab=on&s=30.3438,7.2635%2B29.8803,8.9228&t=2026-05-19-T17%3A50%3A18Z&t1=2026-05-31-T17%3A50%3A18Z&em=true" role="application" sandbox="allow-modals allow-scripts allow-same-origin allow-forms allow-popups" width="100%" height="100%" allow="fullscreen; autoplay;" loading="lazy"></iframe>


![https://podaac.jpl.nasa.gov/Podaac/thumbnails/OPERA_L3_DSWX-HLS_PROVISIONAL_V0.png @nasa-jpl](https://podaac.jpl.nasa.gov/Podaac/thumbnails/OPERA_L3_DSWX-HLS_PROVISIONAL_V0.png)
@nasa-openscapes @doug-newman-nasa @nasa-jpl
[earthdata.nasa.gov/s3fs-public/2026-06/ARSET-Floods2026-part1-exercise.pdf](https://www.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](https://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](https://www.earthdata.nasa.gov/s3fs-public/2026-07/ARSET-Species2026-part1-slides.pdf)
[<video controls src="https://archive.org/download/mydocs_202607/ex2.mp4" />](https://archive.org/download/mydocs_202607/ex2.mp4)



----------------


# Exercise 3
9. **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](https://github.com/user-attachments/assets/7d9d4719-916f-493f-b861-b1d593f8e4a6) /// [DSWx from Harmonized Landsat Sentinel-2 (DSWx-HLS)](https://www.jpl.nasa.gov/go/opera/products/dswx-product-suite/)


>@doug-newman-nasa @podaac @la-county-isd @blackgirlscode @howard-university-web-services @nasa-jpl
>
> [Sentinel2](https://www.esa.int/Applications/Observing_the_Earth/Copernicus/Sentinel-2)  [@esa @nasa-jpl en.wikipedia.org/wiki/Sentinel-2](https://en.wikipedia.org/wiki/Sentinel-2) [@esa @nasa-pds @blackgirlscode sentiwiki.copernicus.eu/web/sentiwiki](https://sentiwiki.copernicus.eu/web/sentiwiki)


[<video controls src="https://archive.org/download/mydocs_202607/HomeworkMonitoringandPredictingFloodsUsingEarthObservationsfor%20PlanningandPreparednessTotal_points_410_SPACEBEACHRexRichardsonVirtiservLATRiCEKARENBASSLANAJHArris.mp4" />](https://archive.org/download/mydocs_202607/HomeworkMonitoringandPredictingFloodsUsingEarthObservationsfor%20PlanningandPreparednessTotal_points_410_SPACEBEACHRexRichardsonVirtiservLATRiCEKARENBASSLANAJHArris.mp4)

<img   alt="newplot" src="https://github.com/user-attachments/assets/e6d9fc85-7895-4124-95a4-593195eca28b" />

<img alt="image" src="https://github.com/user-attachments/assets/63a0fe9b-ff5c-47b9-983b-f581fda7eaba" />


<iframe width="560" height="315" src="https://www.youtube.com/embed/TvRUwxdSYn8?si=BGwGfkPey_-sKiGM" title="YouTube video player" frameborder="0" allow="accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share" referrerpolicy="strict-origin-when-cross-origin" allowfullscreen></iframe>



[earthdata.nasa.gov/s3fs-public/2026-06/ARSET-Floods2026-part3-exercise.pdf @doug-newman-nasa @spaceexplorationtechnologies @nasa @nasa-pds](https://www.earthdata.nasa.gov/s3fs-public/2026-06/ARSET-Floods2026-part3-exercise.pdf)

<img  alt="image" src="https://github.com/user-attachments/assets/dec0de95-8e10-4283-b2bd-dcd780a77440" />

<img alt="image" src="https://github.com/user-attachments/assets/447a7603-8302-4d24-ab5c-b9f17fc54449" />


<iframe width="560" height="315" src="https://www.youtube.com/embed/TvRUwxdSYn8?si=BGwGfkPey_-sKiGM" title="YouTube video player" frameborder="0" allow="accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share" referrerpolicy="strict-origin-when-cross-origin" allowfullscreen></iframe>

[earthdata.nasa.gov/s3fs-public/2026-06/ARSET-Floods2026-part3-exercise_0.pdf @la-county-isd @CityOfLosangeles @blackgirlscode @fema](https://www.earthdata.nasa.gov/s3fs-public/2026-06/ARSET-Floods2026-part3-exercise_0.pdf)

<img   alt="image" src="https://github.com/user-attachments/assets/2e17df7f-8ee9-40a2-af75-2c61ce90ae1b" />

<img  alt="image" src="https://github.com/user-attachments/assets/ae585028-f878-4779-9614-e19b7898477f" />


<img  alt="image" src="https://github.com/user-attachments/assets/7d9d4719-916f-493f-b861-b1d593f8e4a6" />

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

<img  alt="image" src="https://github.com/user-attachments/assets/b40685a1-8e49-465c-9ef4-4d3ea449a56d" />

<iframe src="https://www.google.com/maps/embed?pb=!1m18!1m12!1m3!1d8072058.077583943!2d26.230973085856785!3d8.932037246482917!2m3!1f0!2f0!3f0!3m2!1i1024!2i768!4f13.1!3m3!1m2!1s0x177299ab1aa07b2d%3A0xec0475c40718d4b8!2sWhite%20Nile!5e0!3m2!1sen!2sus!4v1783639702049!5m2!1sen!2sus" width="600" height="450" style="border:0;" allowfullscreen="" loading="lazy" referrerpolicy="strict-origin-when-cross-origin"></iframe>
---------------------------

[nasaevents.webex.com/webappng/sites/nasaevents/webinar/webinarSeries/register/c650981ca52044aa950d0a12c1d7df25 @webex](https://nasaevents.webex.com/webappng/sites/nasaevents/webinar/webinarSeries/register/c650981ca52044aa950d0a12c1d7df25)
<img   alt="image" src="https://github.com/user-attachments/assets/9cf00e5a-1edc-4bc9-bcea-2c3f214661f2" />

![https://www.esa.int/eologos/images/sentinel-2.jpg](https://www.esa.int/eologos/images/sentinel-2.jpg)
![https://en.wikipedia.org/wiki/Sentinel-1](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://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](https://sentiwiki.copernicus.eu/__attachments/a_d55a34c32769e1f1934d1e5dbd8c349f82dfd698d308c4f4def0512e455b5f56/image-20231021-065335.png?cb=29ac5f301b6cfac113042b851e0746fd)

[@esa @nasa-pds @blackgirlscode sentiwiki.copernicus.eu/web/sentiwiki](https://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](https://www.esa.int/var/esa/storage/images/esa_multimedia/images/2024/06/sentinel-1_patch/26187920-1-eng-GB/Sentinel-1_patch.png)


<img   alt="image" src="https://github.com/user-attachments/assets/1a368548-ada3-4605-8335-32725dc4c776" />