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Environmental & Hydrogeodesy


Title Date        Category        
Tracking Precipitation in Northeast Africa with GPS

Vertical motions measured by GPS ground stations can be used to track water loads related to precipitation in Ethiopia and Eritrea. The network monitors the seasonal East African monsoon and a smaller regional rainy season. The GPS network is an effective water monitor for the region, where most of the population is agriculture-based.

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2015-11 Human Dimensions and Environmental & Hydrogeodesy
The Highs and Lows of Water Loading in the Pacific Northwest from GPS

Eight years of observations of millimeter-level vertical surface changes from a dense network of Global Positioning System (GPS) receivers in the Pacific Northwest tracks a fluctuating water load due to varying precipitation. The observations track seasonal variations (i.e., more rain or snow in the fall and winter) and the drought of 2008-2010.

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2015-05 Human Dimensions and Environmental & Hydrogeodesy
Plate Boundary Observatory as a Hydrological Network to Monitor Drought

The Plate Boundary Observatory in the western United States is being used as a hydrological monitor. From 2013-2014, the western U.S. lost about 240 gigatons of water, equal to the amount of annual ice loss in Greenland.

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2014-09 Human Dimensions and Environmental & Hydrogeodesy
Seasonal GPS Vertical Motions Related to Groundwater Extraction May Enhance Seismicity on San Andreas Fault System

Analysis of GPS stations, many that are part of the Plate Boundary Observatory, reveals uplift of the California Coast Ranges and Sierra Nevada Mountains. Much of this uplift comes from groundwater depletion for irrigation. These changes may increase the rate of seismicity on the San Andreas Fault.

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2014-05 Human Dimensions and Environmental & Hydrogeodesy
Plate Boundary Observatory Evaluates California’s Water Resources

About 900 GPS stations, most of which are part of the Plate Boundary Observatory in the western United States, recorded the Earth’s surface response to snow and rain loading. The analysis indicates the seasonal water storage in the mountains in California and shows another way to use GPS for water resource management.

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2014-05 Human Dimensions and Environmental & Hydrogeodesy
Sea Level Rise on the U.S. Gulf Coast

The Mississippi Delta along the Gulf Coast of the United States is a major site of sediment deposition from the Mississippi River and conversely a major site of wetland loss from rising seas and subsidence. There is debate about how much and when the delta has risen or fallen due to deposition, subsidence, sea level change, and erosion.

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2013-02 Environmental & Hydrogeodesy
Bounces in GPS signals reveal snow depth

Measurements of snow depth are important to climate modelers, meteorologists, and water resource managers, but in the past there has not been both an accurate and widespread method of obtaining these data.

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2012-09 Environmental & Hydrogeodesy
GPS can help monitor a sinking city

Subsidence, or sinking, is becoming a big issue for coastal towns that are also dealing with the threat of rising sea-level. A sinking city becomes more susceptible to flooding over time, and knowing the rate of subsidence can help a city prepare for future floods.

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2012-09 Environmental & Hydrogeodesy

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Last modified: Friday, 13-Nov-2015 17:21:22 UTC

 

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