HOME >> BIOLOGY >> NEWS
Satellite radar gauges water levels in Louisiana wetlands

reflects the signal very strongly. Strong signals confuse the satellite's onboard receiver, so the software that converts the radar signal to height measurements doesn't work properly.

Scientists believe wetlands are important ecologically, because they filter wastes out of the water. They also provide a barrier between the land and large bodies of water, such as the Gulf of Mexico . During a hurricane, for instance, vegetated wetlands act like sponges to absorb water from a storm surge, as they absorb some of the energy from the storm itself.

But gauging the health of wetlands can pose a challenge. The interior regions are hard to reach, which makes it difficult for scientists to measure water levels manually. Most in-ground gauges are placed in easily accessible areas along the edges.

Case in point: two of the four locations imaged by radar in this study were deep within the wetlands, with the closest in-ground water gauge miles away. That posed a difficulty for Shum's team as they tried to determine whether their satellite data was accurate.

"Some of the gauges were quite far away, but at least we were able to show a qualitative agreement with seasonal changes," Shum said.

In future studies, they want to examine data from more locations, and couple the data with more ground measurements.

"Because of the ground track layout for TOPEX/Poseidon, most times one has to be lucky that the tracks fall on the wetlands. We may try using other radar altimeter satellites to improve the spatial resolution of the wetland study. However, the primary limitation for TOPEX/Poseidon is its narrow measurement swath on the ground," Shum said. The satellite gathers data in a strip, up to only 3 miles wide.

Shum pointed to the proposed WATER HM (short for Water And Terrestrial Elevation Recovery Hydrosphere Mapper) satellite mission, led by Doug Alsdorf, assistant professor of earth sciences at Ohio State . That miss
'"/>

Contact: C.K. Shum
ckshum@osu.edu
614-292-7118
Ohio State University
11-Dec-2006


Page: 1 2 3

Related biology news :

1. Satellite tracking reveals threats to Borneo pygmy elephants
2. Satellite tracking will help answer questions about penguin travels
3. Satellite survey links tropical park fires with poverty and corruption
4. Satellite images reveal link between urban growth and changing rainfall patterns
5. Satellite images show destroyed and threatened villages in Darfur
6. Satellites shed light on global warming
7. Satellites play vital role in understanding the carbon cycle
8. Satellite data vital to UN climate findings
9. Satellite images obtained by AAAS program provide strong evidence of Zimbabwe repression
10. Satellite instrument helps tackle mysteries of ozone-eating clouds
11. Satellites support businesses working for sustainable development

Post Your Comments:
*Name:
*Comment:
*Email:


(Date:4/11/2017)... Research and Markets has announced the addition of the ... ... grow at a CAGR of 30.37% during the period 2017-2021. ... prepared based on an in-depth market analysis with inputs from industry ... over the coming years. The report also includes a discussion of ...
(Date:4/5/2017)... 2017  The Allen Institute for Cell Science today ... one-of-a-kind portal and dynamic digital window into the human ... first application of deep learning to create predictive models ... and a growing suite of powerful tools. The Allen ... future publicly available resources created and shared by the ...
(Date:4/3/2017)... WASHINGTON , April 3, 2017 /PRNewswire-USNewswire/ ... single-cell precision engineering platform, detected a statistically ... cell product prior to treatment and objective ... highlight the potential to predict whether cancer ... prior to treatment, as well as to ...
Breaking Biology News(10 mins):
(Date:5/26/2017)... ... May 25, 2017 , ... Throughout ... case studies, describing how process development and economic goals were achieved in both ... using a hollow-fiber bioreactor system, along with techniques for scaling production of mesenchymal ...
(Date:5/26/2017)... ... May 25, 2017 , ... LabRoots , the leading provider of scientific ... the world, is announcing a new textbook scholarship, the second scholarship in the LabRoots ... 17 years or older, pursuing a degree in one of the life sciences. The ...
(Date:5/24/2017)... ... May 24, 2017 , ... Today, the ... Water Recovery’s Advanced Biological Nutrient Recovery (ABNR™) technology at its 4,000,000 gallon per ... plant upgrade to sustainably meet current and future nutrient discharge regulations. The ABNR ...
(Date:5/24/2017)... USA (PRWEB) , ... May 23, 2017 , ... Federal ... as well as an enabler of life-saving medical and other vital technologies — deserves ... . They joined others in the scientific community today in responding to the President’s ...
Breaking Biology Technology:
Cached News: