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:
TAG: Satellite radar gauges water levels Louisiana wetlands

(Date:4/2/2015)... GOTHENBURG, Sweden , April 2, 2015 ... revenues for Q1 2015 attributed to somewhat higher than ... company in the year-end report 2014 that revenues for ... MSEK that the company reported for Q4 2014. The ... continue to be negative. The complete interim report will ...
(Date:4/1/2015)... Medisafe ™, the leading global medication management platform with ... Android smartphones and tablets, announces today that ... allow patients to track and correlate their adherence directly ... be able to visualize in real-time how taking medication ... glucose levels and blood pressure. "Patients need ...
(Date:3/30/2015)... --Research and Markets ( http://www.researchandmarkets.com/research/lc9bnl/global_gesture ) has ... Market in Automotive Sector 2014-2018" report to their ... Recognition market in Automotive Sector to grow at a ... Gesture recognition is the ability of a device to ... Gesture recognition technology can be 2D-based or 3D-based. It ...
Breaking Biology News(10 mins):Fingerprint Cards Revises Revenues for Q1 2015 2Medisafe Announces Launch of Biometric Integration, Enabling Patients to Stay Adherent to Their Meds and See Tangible Health Results 2Global Gesture Recognition Market in Automotive Sector Report 2015 - Growing Number of Partnerships 2
(Date:4/20/2015)... FOSTER CITY, Calif. , April 20, 2015 /PRNewswire/ ... with InterpretOmics Pvt. Ltd. to provide an integrated Big ... analysis of all biomarkers collected in the context of ... the needs of precise or multi-targeted drug candidates, stratified ... efficacy and disease progression free survival. ...
(Date:4/20/2015)... Portage Biotech Inc. ("Portage" or "the Company") (OTC Market: ... that its wholly owned subsidiary, Portage Pharmaceuticals Ltd. (PPL) ... of its proprietary human-derived CPP sequences and a cargo ... NFkB signalling even if administered when the BBB is ... brain barrier (BBB) in mice was studied and was ...
(Date:4/20/2015)... Whitehouse Laboratories is pleased and overly excited to ... and Drug Administration (FDA) inspection and received no observations ... compliance inspection, as based upon 21CFR Parts 210 and ... and was granted NAI (no action indicated) status. The ... Manufacturing Practice (GMP) quality system required by the regulatory ...
(Date:4/17/2015)... (PRWEB) April 17, 2015 CIO Review ... for its 20 Most Promising Pharma and Life Science ... MMIS’s MediSpend global compliance software platform for life sciences ... selected by a panel of experts and members of ... entrepreneurship. “MMIS’s MediSpend Platform has been on our radar ...
Breaking Biology Technology:PointCross Life Sciences and InterpretOmics partner for Clinical and Genomic Biomarker Management for Drug Development 2Portage's CPP Platform Delivers a Peptide Cargo Across Blood Brain Barrier 2Portage's CPP Platform Delivers a Peptide Cargo Across Blood Brain Barrier 3Whitehouse Laboratories Completes FDA Inspection with No Form 483 – No Observations 2Whitehouse Laboratories Completes FDA Inspection with No Form 483 – No Observations 3MMIS Chosen by CIO Review as Top 20 Most Promising Pharma and Life Science Technology Solution Providers 2015 2
Cached News: