Displaying 61 - 70 of 89
![The image displays NDVI calculated over the Guadalupe Mountain Range in Western Texas captured May 2020 by Landsat 8 OLI. Areas shaded green indicate tree canopy while yellow and red areas indicate arid landscapes. NDVI was used to visualize vegetation health and inform the National Park Service’s future management initiatives.](/sites/default/files/styles/lis/public/2022-12/2022Sum_LaRC_DelawareBasinEco_WebsiteImage.png.webp?itok=uBm4Yq0D)
Delaware Basin Ecological Forecasting (Summer 2022) Team: Jack Mezger (Project Lead), Mark Bossinger, Gillian McNamara, Quinn Heiser Summary: The Guadalupe Mountains and Carlsbad Caverns National...
![Enhanced Wetland Classification of the Slave River Delta, NWT, Canada using Landsat 8 OLI imagery from June through August 2021. Most of the colors represent different categories of wetland. Many of the darker green areas represent areas where wetlands have transitioned to dryer forests or shrubs in recent decades.](/sites/default/files/styles/lis/public/2022-12/2022Sum_MA_GreatSlaveLakeWater_WebsiteImage.png.webp?itok=JnQr2WJ-)
Mapping Long-Term Changes in the Hydroecology of the Slave River Delta Using NASA Earth Observations
Great Slave Lake Water Resources (Summer 2022) Team: Yuhe Chang (Project Lead), Virgil Alfred, Ethan McIntosh, Catherine Shea Summary: Indigenous communities around the Great Slave...
![Top layer: NDTI processed imagery of Lake Champlain derived from Landsat 8 TOA data (5/1/21 - 9/30/21). Bright orange and red represent areas of greater turbidity, which often corresponds to algal presence, whilst dark areas indicate low turbidity. Bottom layer: Slope imagery from SRTM (last updated 11/2018) of the Lake Champlain Watershed. Yellow shows areas with higher slopes, which have a greater risk of phosphorus runoff, while blue shows areas with a lesser slope.](/sites/default/files/styles/lis/public/2022-12/2022Sum_MSFC_LakeChamplainWater_WebsiteImage.png.webp?itok=WnLYkj9z)
Lake Champlain Water Resources (Summer 2022) Team: Brianne Kendall (Project Lead), Laramie Plott, Ian Turner, Aaron Carr Summary: Lake Champlain provides clean drinking water for...
![This image of the Chesapeake Bay is derived from NASA Landsat 7 ETM+ and Landsat 8 OLI imagery. It represents median Normalized Difference Turbidity Index (NDTI) turbidity levels from January 2020 through June 2022. Yellow and orange areas indicate higher turbidity levels. This imagery can be used to determine areas of the bay in which turbidity poses a threat to water quality.](/sites/default/files/styles/lis/public/2022-12/2022Sum_PUP_ChesapeakeBayWater_WebsiteImage.png.webp?itok=tBWfMYEk)
Chesapeake Bay Water Resources (Summer 2022) Team: Katherine Hahn, Julia Atayi, Julia Portmann, Abigail Sgan Summary: An increase in total suspended sediment (TSS) concentrations and...
![Median daily evapotranspiration (ET) from September 2021 to May 2022 calculated from ISS ECOSTRESS data. The image covers the agricultural fields adjacent to the Maipo River, Chile and depicts water stress. The color scale ranges from red (low ET) to blue (high ET), with higher ET observed over irrigated agricultural fields. ET is used for estimating crop irrigation requirements. This data will inform irrigation management practices and help alleviate water scarcity within the area. ](/sites/default/files/styles/lis/public/2023-01/2022Sum_ID_IdahoWildfires_WebsiteImage.jpg.webp?itok=MgV2NTHF)
IDAHO WILDFIRES (Summer 2022) Team: Ford Freyberg (Project Lead), Carson Schuetze, Jessica Hiatt, Brenner Burkholder Summary: Escalating severity and frequency of drought and wildfire call...
![Normalized difference vegetation index (NDVI) generated from an October 5, 2021 Landsat 8 OLI image of Yellowstone National Park. The dark green shades represent areas with healthy vegetation, yellow depicts bare ground, and intermediate shades reflect a gradient of vegetation productivity. Areas with NDVI values that vary throughout the year are indicative of deciduous vegetation and can help resource managers understand changes in aspen stand extent.](/sites/default/files/styles/lis/public/2023-02/2022Fall_GA_YellowstoneEcoII_WebsiteImage.jpg.webp?itok=9zItKz9L)
Yellowstone Ecological Forecasting II (Fall 2022) Team: Vanessa Bailey (Project Lead), Ryan Brinton, Samantha Snowden, Aliza White Summary: Aspen stands in Yellowstone National Park have...
Capacity Building
Ecological Conservation
Water Resources
![NDTI-processed river imagery from 2021 PlanetScope data with GPM IMERG data shown in blue. The Shoshone River in northwestern Wyoming is shown with red values indicating lower turbidity and yellow values representing higher turbidity. Lighter blue values indicate higher monthly mean IMERG precipitation values for 2021. NDTI values and precipitation averages help watershed managers understand where and when excess sediment enters the river.](/sites/default/files/styles/lis/public/2023-02/2022Fall_PUP_ShoshoneRiverWater_WebsiteImage.jpg.webp?itok=myaPr9UA)
Shoshone River Water Resources (Fall 2022) Team: Robyn Holmes (Project Lead), Will Campbell, Cassie Ferrante, Nelson Lemnyuy Summary: In 2016, a routine repair operation at...
![Land cover imagery processed from Landsat 8 OLI and ocean turbidity data imagery processed from Sentinel-2 MSI. The Tijuana River stormwater plume off the San Diego coast was mapped from data collected on December 5th, 2019, while the land surface data was collected on April 4th, 2022. Shades of red indicate high turbidity values, while blue areas show normal turbidity values. Areas of high turbidity reflect high concentration of pollutants from stormwater runoff.](/sites/default/files/styles/lis/public/2023-02/2022Fall_ARC_SanDiegoWaterResources_WebsiteImage.jpg.webp?itok=Z3fy2AmA)
San Diego Water Resources (FALL 2022) Team: Ethan Gates (Project Lead), Stefanie Mendoza, Jonathan Szeto, Max VanArnam Summary: Stormwater and wastewater runoff are a large...
![NDVI imagery derived from Landsat 8 OLI data. This imagery showing the California’s Carmel and Salinas Valleys within the surrounding Santa Lucia Mountain range was collected in the Spring of 2019 . Light green areas show the more developed, agriculturally intensive areas of the valley while the dark blue areas show the less developed hills. NDVI calculations were used in models of forest cover changes in the area over time.](/sites/default/files/styles/lis/public/2023-02/2022Fall_CO_CarmelValleyEcoForecasting_WebsiteImage.jpg.webp?itok=AwlUPU2s)
Carmel Valley Urban Development (Fall 2022) Team: Cooper Campbell (Project Lead), Julia Portmann, Devina Garcia, Audrey Wilson Summary: Urban expansion in diverse ecosystems has numerous...