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:7/8/2015)... -- The consumer products industry for innovative tech ... such as wearables, smart wallets & other smart technology are ... continues to rapidly grow.  Biometrics & Wearable Device Companies in ... Inc. (NASDAQ: GOOG ), Apple Inc. (NASDAQ: AAPL ... GPRO ) and Baidu Inc. (NASDAQ: BIDU ) ...
(Date:7/2/2015)... -- Research and Markets( http://www.researchandmarkets.com/research/km7m5t/natural_language ... "Natural Language Processing Market by Type (Rule-Based, Statistical, ... Image Recognition) - Worldwide Forecast to 2020" ... vendors occupying the market are 3M, Apple, Dolbey ... Solutions, SAS Institute Inc., Verint Systems among various ...
(Date:6/30/2015)... June 30, 2015 Genisphere announced ... CEO to help further develop Genisphere,s therapeutics capabilities and ... experience, having spent much of the last 25 years ... Baxter Bioscience, and Johnson & Johnson. Tom started his ... and Biotech Corporate Finance. He graduated from Dartmouth College ...
Breaking Biology News(10 mins):Consumers Flock to This Summer's Must Have Tech Gadgets as Latest Digital Wallets, Smart Technology & Wearable Products Continue to Grow in Popularity & Functionality 2Consumers Flock to This Summer's Must Have Tech Gadgets as Latest Digital Wallets, Smart Technology & Wearable Products Continue to Grow in Popularity & Functionality 3Consumers Flock to This Summer's Must Have Tech Gadgets as Latest Digital Wallets, Smart Technology & Wearable Products Continue to Grow in Popularity & Functionality 4Consumers Flock to This Summer's Must Have Tech Gadgets as Latest Digital Wallets, Smart Technology & Wearable Products Continue to Grow in Popularity & Functionality 5Consumers Flock to This Summer's Must Have Tech Gadgets as Latest Digital Wallets, Smart Technology & Wearable Products Continue to Grow in Popularity & Functionality 6Natural Language Processing Market by Type (Rule-Based, Statistical, and Hybrid), Technologies (Recognition, IVR, OCR, Pattern & Image Recognition) - Worldwide Forecast to 2020 2Genisphere Appoints New CEO, Thomas Bliss 2Genisphere Appoints New CEO, Thomas Bliss 3
(Date:7/29/2015)... 2015 Sanofi, un leader ... résultats pour le premier semestre 2015. Le Directeur ... Visionner l,interview vidéo et lire la ... Au sommaire de l,interview :  ... croissance - Diabète - ...
(Date:7/29/2015)... Ala., July 29, 2015  HealthSouth ... nation,s largest providers of post-acute healthcare services, offering ... its results of operations for the second quarter ... quarter was characterized by strong volume growth in ... Adjusted EBITDA," said Jay Grinney, President and Chief ...
(Date:7/29/2015)... , July 29, 2015  AmnioChor Inc., an ... technology, is very pleased to announce that the Musculoskeletal ... has agreed to invest in their seed round of ... placental tissue storage capabilities. AmnioChor,s technology ... and the human stem cells living within those tissues. ...
(Date:7/29/2015)... July 29, 2015 /PRNewswire/ - RepliCel Life Sciences Inc. ... medicine company, is pleased to announce that the final ... have been locked.  Prototypes for industrial and regulatory ... an application for CE mark clearance to market ... in 2016. (Photo: http://photos.prnewswire.com/prnh/20150729/248373 )  ...
Breaking Biology Technology:HealthSouth Reports Results for Second Quarter 2015 2HealthSouth Reports Results for Second Quarter 2015 3HealthSouth Reports Results for Second Quarter 2015 4HealthSouth Reports Results for Second Quarter 2015 5HealthSouth Reports Results for Second Quarter 2015 6HealthSouth Reports Results for Second Quarter 2015 7HealthSouth Reports Results for Second Quarter 2015 8HealthSouth Reports Results for Second Quarter 2015 9HealthSouth Reports Results for Second Quarter 2015 10HealthSouth Reports Results for Second Quarter 2015 11HealthSouth Reports Results for Second Quarter 2015 12HealthSouth Reports Results for Second Quarter 2015 13HealthSouth Reports Results for Second Quarter 2015 14HealthSouth Reports Results for Second Quarter 2015 15HealthSouth Reports Results for Second Quarter 2015 16HealthSouth Reports Results for Second Quarter 2015 17HealthSouth Reports Results for Second Quarter 2015 18HealthSouth Reports Results for Second Quarter 2015 19HealthSouth Reports Results for Second Quarter 2015 20HealthSouth Reports Results for Second Quarter 2015 21HealthSouth Reports Results for Second Quarter 2015 22HealthSouth Reports Results for Second Quarter 2015 23HealthSouth Reports Results for Second Quarter 2015 24HealthSouth Reports Results for Second Quarter 2015 25HealthSouth Reports Results for Second Quarter 2015 26HealthSouth Reports Results for Second Quarter 2015 27HealthSouth Reports Results for Second Quarter 2015 28HealthSouth Reports Results for Second Quarter 2015 29HealthSouth Reports Results for Second Quarter 2015 30HealthSouth Reports Results for Second Quarter 2015 31HealthSouth Reports Results for Second Quarter 2015 32HealthSouth Reports Results for Second Quarter 2015 33HealthSouth Reports Results for Second Quarter 2015 34HealthSouth Reports Results for Second Quarter 2015 35HealthSouth Reports Results for Second Quarter 2015 36
Cached News: