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:12/2/2016)... 1, 2016   SoftServe , a global ... , an electrocardiogram (ECG) biosensor analysis system for ... IoT asset. The smart system ensures device-to-device communication ... wheel and mobile devices to easily ,recognize, and ... As vehicle technology advances, so too must the ...
(Date:11/29/2016)... , November 29, 2016 Nearly one billion matches ... Reading ... DERMALOG ... of an efficient Identity Management. (PRNewsFoto/DERMALOG Identification Systems) ... DERMALOG is Germany's largest Multi-Biometric supplier: The company's ...
(Date:11/21/2016)... 2016   Neurotechnology , a provider of ... announced that the MegaMatcher On Card fingerprint matching ... the NIST Minutiae Interoperability Exchange (MINEX) III ... steps of the evaluation protocol. ... of fingerprint templates used to establish compliance of ...
Breaking Biology News(10 mins):
(Date:12/2/2016)... Research and Markets has announced the addition of ... to their offering. ... , , An ... is anticipated. Nanotechnology will be applied at all stages of ... applications in clinical trials. Many of the assays based on ...
(Date:12/2/2016)... (PRWEB) , ... December 01, 2016 , ... ... Computational Science Symposium (CSS) and the popularity of US Single Day Events (SDE) ... place in early Summer 2018, in Raleigh, NC. Topics of the pharmaceutical and ...
(Date:12/2/2016)... ... December 02, 2016 , ... ... biotechnology companies dedicated to collaboratively developing improved chemistry, manufacturing and control technologies ... portable online UHPLC, with robust, probe-based sampling. , Online liquid chromatography ...
(Date:12/2/2016)... Dec. 2, 2016 /PRNewswire/ - bioLytical Laboratories, a world leader in rapid infectious disease ... Kenya,s Pharmaceutical Association members. (Photo: http://photos.prnewswire.com/prnh/20161201/444905 ) ... ... , , ... Kenya Pharmaceutical Association (KPA) to introduce the INSTI HIV Self Test to 350 pharmacy ...
Breaking Biology Technology:
Cached News: