Displaying items by tag: geospatial modeling

How to use free satellite data to monitor natural disasters and environmental changes

This story was originally published by The Conversation. Qiusheng Wu is assistant professor of geography and sustainability at University of Tennessee.

KNOXVILLE — If you want to track changes in the Amazon rainforest, see the full expanse of a hurricane or figure out where people need help after a disaster, it’s much easier to do with the view from a satellite orbiting a few hundred miles above Earth.

Traditionally, access to satellite data has been limited to researchers and professionals with expertise in remote sensing and image processing. However, the increasing availability of open-access data from government satellites such as Landsat and Sentinel, and free cloud-computing resources such as Amazon Web Services, Google Earth Engine and Microsoft Planetary Computer, have made it possible for just about anyone to gain insight into environmental changes underway.

I work with geospatial big data as a professor. Here’s a quick tour of where you can find satellite images, plus some free, fairly simple tools that anyone can use to create time-lapse animations from satellite images.

ORNL researchers receive 2021 Sustainability Science Award for mapping human influence on U.S. river and stream changes 

Researchers from Oak Ridge National Laboratory mapped and quantified hydrological changes throughout the country due to urban development, energy production and other human factors and won a prestigious award for their efforts.

The team’s analysis was published in the Proceedings of the National Academy of Sciences and received the 2021 Sustainability Science Award from the Ecological Society of America.

“The Sustainability Science Award recognizes the authors of a scholarly work that make a substantial contribution to the emerging science of ecosystem and regional sustainability through the integration of ecological and social sciences. The researchers will be recognized during the society’s annual meeting in August,” according to an ORNL release announcing the award.

The research coupled U.S. Geological Survey stream-flow records with geospatial modeling to quantify human impact on national water resources and concluded the 7 percent of affected aquatic systems hold 60 percent of North American freshwater fish, mussels and other species.

“This work exemplifies how ORNL’s interdisciplinary research in environmental and geospatial science helps equip decision makers with the tools needed to move our nation toward a more sustainable future,” Stan Wullschleger, associate laboratory director for ORNL’s Biological and Environmental Systems Science Directorate, said in the release.

Lead author Ryan McManamay, an aquatic ecologist and faculty member at Baylor University, was with ORNL’s Environmental Sciences Division at the time of publication. Co-authors include ORNL’s Sujithkumar Surendran Nair, Christopher DeRolph, the late April Morton, Robert Stewart, Matthew Troia and Budhendra Bhaduri; Northern Arizona University’s Benjamin Ruddell; and the University of Tennessee’s Liem Tran and Hyun Kim.

“It was a privilege to work with this team that spanned across multiple disciplines and institutions,” said Bhaduri, an ORNL Corporate Research Fellow and director of ORNL’s Geospatial Science and Human Security Division. “Given the impacts of climate change, there has never been a more pressing opportunity to address environmental sustainability. It’s a tremendous honor to make this scientific contribution and to be recognized for it.”