Principal Investigator

Annemarie Peacock

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Automated Wetland Hydroperiod Mapping by Integrating Optical Satellite Imagery and Synthetic Aperture Radar

Alaska’s wetlands cover approximately one third of the state and provide a multitude of ecosystem services, including nutrient retention, water purification, and provision of habitat for fish, wildlife, and vegetation. The temporal variation in wetland inundation affects these ecosystem functions, and for effective wetland policy...

Principal Investigator

Erika Munshi

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At the base, Landsat 8 OLI displays an 8-day NDWI composite using 2020 imagery in false color; light hues represent higher presence of water. Howard County slope displayed in black and white; white values indicate steep areas and emphasize water transport efficiency in Ellicott City, MD (center) joining the Patapsco River. NASA Daymet precipitation from May 2018 flash flood event displayed in rainbow; purple hues represent severe rainfall on right of image as storm recedes.   Keywords: precipitation, hydrology, forecast, early warning system, disaster preparedness​

As flood events in the United States grow in frequency and intensity, the uses of applied remote sensing analyses are increasingly necessary for effective flood monitoring and warning systems. The NASA DEVELOP Ellicott City Disasters III project investigated the use...

Principal Investigator

M. Colin Marvin

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Nearshore turbidity created with 2020 Landsat 8 OLI red band (B3). Assateague Island, our study site, is located off the coast of Virginia and Maryland. Red shades suggest high turbidity, light green and yellow shades suggest moderate turbidity and blue and purple shades show low turbidity. Knowing the extent of turbidity allows the team to examine how natural longshore currents are moving sediment deposited by the US Army Corps of Engineers. This is important for both the geological integrity of the island and threatened species depend on sediment replenishment.  Keywords: Turbidity, ORCAA, ocean color, bathymetry, sediment transport

Assateague Island is located off the coast of Maryland and Virginia and serves as a home to sensitive species and habitats. However, infrastructure development disrupted the natural sediment transport processes of the barrier island, which accelerated erosion of the island’s...

Principal Investigator

Brandon Crawford

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Characterizing Vegetation Type at Pre- and Post-wildfire Periods Using NASA Earth Observations

Wildfire is a key driver of ecosystem progression in the sagebrush steppe-dominated landscapes of southern Idaho. Fire-related disturbances can facilitate the propagation of invasive vegetation, threatening native wildlife and shaping a fire regime that is increasingly hazardous to adjacent urban development. Applying the methodology created...

Principal Investigator

Roger Ly

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This image is a composite of radiometrically terrain corrected UAVSAR L-band imagery over the Agua Salud Project area in the Panama Canal Watershed, collected on February 2nd, 2010 and March 13th, 2015 from the NASA Gulfstream III Jet. The image is composed of several images, with different temporal combinations of the HV backscatter. Darker colors show an increase in volume scattering over time, indicating increased biomass. These images were used to discern land cover change.  Keywords: UAVSAR, RTC, Agua Salud Project, STRI

The Panama Canal Watershed (PCW) is a major socioeconomic resource. The PCW provides potable water to surrounding cities and ensures the Panama Canal remains fully operational throughout each year. Over one million residents in Panama City, Colón, and San Miguelito...

Principal Investigator

Deki Namgyal

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2020 mean annual temperature derived from Famine Early Warning Systems Network (FEWS NET) Land Data Assimilation System (FLDAS) for the country of Bhutan. Pixels display low to high mean temperatures. The shades of blue indicate lower temperatures, while shades of red indicate higher temperatures. Comparing the map to older maps allows us to locate which areas of Bhutan have been affected the most by changes in climate.  Keywords: Remote Sensing, Temperature, FLDAS

Bhutan is vulnerable to climate fluctuations that can affect vegetation phenology patterns. Changes in the climate have raised concerns from local farmers about altered growing seasons. In response, the DEVELOP team assessed annual vegetation phenology trends across Bhutan from 1981-2014 by comparing vegetation phenology-derived...

Principal Investigator

Kinley Dorji 

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CHIRPS satellite data uses TRMM. Total precipitation calculated within the country of Bhutan during the 2019 monsoon period (June - August). The darker shades of blue represents higher concentrations of rainfall, while the lighter shades of blue represent lower concentrations of rainfall.   Keywords: Bhutan, CHIRPS, TRMM​

Himalayan countries, including Bhutan, have become vulnerable to warming trends which result in increasing temperature and variable rainfall and snowfall. By combining phenological and meteorological data, Earth observation platforms and sensors were used to assess trends in precipitation, temperature, and...

Principal Investigator

Trista Brophy

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Curve number runoff calculated from NDVI-processed imagery using 2019 Landsat 8 OLI data. The southern portion of the county, with the City of Manhattan to the east, is displayed. Blue shades indicate lower runoff and red shades indicate higher runoff. Local stakeholders could expect more flooding to occur where there is higher runoff and should focus on these areas during resiliency planning.   Keywords: curve number runoff, NDVI, land use change, Trista Brophy, Ella Griffith, Elizabeth Nguyen, Adelaide Schmidt​

Riley County, Kansas, has observed increased levels of flooding, potentially due to changes in land use/land cover (LULC) and seasonal vegetation variation. This study contrasts two methods of generating runoff curve numbers (CN) from 2006-2020. (1) The traditional Soil Conservation...

Principal Investigator

Rya Inman

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False color composite (bands 5, 4, and 3) of recent (2016 to 2019) leaf-off vegetation in the New York Adirondacks region processed using Landsat 8 OLI data overlaid with the HydroSHEDS Hydrologically Conditioned DEM from the World Wildlife Fund (2000) in cyan. Pure eastern hemlock stands are indicated in red and hemlock-dominant stands are indicated in orange. Areas of pure eastern hemlock should be the primary focus of land managers’ conservation efforts against the invasive hemlock woolly adelgid.

Hemlock woolly adelgid (HWA; Adelges tsugae) is an invasive species that threatens eastern hemlock (Tsuga canadensis) in US forests. Eastern hemlock has a greater capacity to store carbon, regulate stream temperatures, and provide habitat for wildlife compared to sympatric tree species. The New...

Principal Investigator

Ryan Lam

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Forecasted NDVI-processed imagery using 2021 MODIS data with a soybean fields (purple) overlay in central Argentina. Magenta zones indicate low values of NDVI, such as water or bare soil. Blue and cyan represent moderate to high values of NDVI, denoting areas of higher biomass. Understanding the health and status of the agricultural crop growth allows the Buenos Aires Grain Exchange highlight potential food insecurities in the region to farmers, consumers, and policymakers.  Keywords: NDVI, crop yield forecasting, Brooke Egley, Ryan Lam, Tyler Pantle, Sienna Templeman, Caroline Williams

Early harvest information helps drive the national budget in Argentina, providing valuable planning information to identify potential food-insecure regions, anticipate transportation and storage demands, predict price fluctuations, and project commodity trends. However, crop yield estimates are currently subjective, based on...