Featured Research

from universities, journals, and other organizations

Remotely Sensing City Growth And Landscape Changes

Date:
April 12, 2000
Source:
NASA/Goddard Space Flight Center--EOS Project Science Office
Summary:
The latest remote sensing research in the field of geography will be presented April 4-8 at the Association of American Geographers Meeting at the David L. Lawrence Convention Center in Pittsburgh, Pa.

The latest remote sensing research in the field of geography will be presented April 4-8 at the Association of American Geographers Meeting at the David L. Lawrence Convention Center in Pittsburgh, Pa.

NASA's Marshall Space Flight Center geographer Dale Quattrochi and forest ecologist Jeffery Luvall have been using Landsat data to take the temperature of Atlanta; Salt Lake City; Huntsville, Ala.; Baton Rouge, La.; and Sacramento, Calif. After the hot spots of the city have been identified, steps can be taken to cool the city's temperatures. Adding trees and grassy areas as well as replacing dark-colored roofs with light -colored ones can alter the city's temperature. A dark-colored roof in the city measures an average of 170 degrees Fahrenheit (138 degrees Celsius), while a light -colored roof measures a much cooler 70 degrees Fahrenheit (38 degrees Celsius), and forests measure 60 degrees Fahrenheit (28 degrees Celsius). "One city in the study isn't necessarily hotter or cooler than another," says Luvall.

While the asphalt and concrete building make-up of cities is basically the same, Quattrochi was able to find some subtle differences between the cities in the study. The lush vegetation in Baton Rouge is supported by the city's location near the Gulf of Mexico, but Atlanta, which is further inland, still maintains rich vegetation. "Atlanta has enough water to support its trees," says Quattrochi, "But Salt Lake City has to irrigate extensively to support its trees because the city is located in a semi-arid environment." Quattrochi added that this irrigation might possibly reduce the urban heat island effect over the city.

Pennsylvania State University meteorologist Toby Carlson has been using Landsat data to examine changes in runoff patterns as urban areas grow and change their landscape. Carlson and graduate student Traci Arthur have been using computer models that simulate land use changes that influence stormwater runoff. The study analyzes stormwater runoff over a porous surface like soil in contrast to a nonporous surface such as asphalt. Carlson also predicts the spread of urban growth in an area of abandoned strip mines where a new road is being constructed. "Some of these strip mines are grown over with vegetation, which makes them more likely to support future development than other mines that are bare," says Carlson. In the future, Carlson would like to be able to predict future runoff in developing urban areas.

University of North Carolina at Chapel Hill geographer Lawrence Band has been investigating how urbanization affects storm water runoff using satellite data plugged into computer models. The model simulations showed the differences in water quantity and quality in developed and undeveloped drainage areas. Changes in the path water takes because of roads and storm sewers causes changes in the ecosystem of the drainage basin. "Predicting how heavy rainfall or light rainfall runoff will impact the drainage basin is difficult when you factor in development, " says Band, "Using low water flow in the model, gave the best indicator of the changes between city and suburban storm water runoff, because with low waterflow, you can see more clearly where the water is draining." Band also said that the amount of water imported and exported as water supply and sanitary drainage has very significant interactions with the natural hydrological cycle.


Story Source:

The above story is based on materials provided by NASA/Goddard Space Flight Center--EOS Project Science Office. Note: Materials may be edited for content and length.


Cite This Page:

NASA/Goddard Space Flight Center--EOS Project Science Office. "Remotely Sensing City Growth And Landscape Changes." ScienceDaily. ScienceDaily, 12 April 2000. <www.sciencedaily.com/releases/2000/04/000406090328.htm>.
NASA/Goddard Space Flight Center--EOS Project Science Office. (2000, April 12). Remotely Sensing City Growth And Landscape Changes. ScienceDaily. Retrieved October 22, 2014 from www.sciencedaily.com/releases/2000/04/000406090328.htm
NASA/Goddard Space Flight Center--EOS Project Science Office. "Remotely Sensing City Growth And Landscape Changes." ScienceDaily. www.sciencedaily.com/releases/2000/04/000406090328.htm (accessed October 22, 2014).

Share This



More Earth & Climate News

Wednesday, October 22, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

Traditional Farming Methods Gaining Ground in Mali

Traditional Farming Methods Gaining Ground in Mali

AFP (Oct. 20, 2014) He is leading a one man agricultural revolution in Mali - Oumar Diatabe uses traditional farming methods to get the most out of his land and is teaching others across the country how to do the same. Duration: 01:44 Video provided by AFP
Powered by NewsLook.com
How Detroit's Money Woes Led To U.N.-Condemned Water Cutoffs

How Detroit's Money Woes Led To U.N.-Condemned Water Cutoffs

Newsy (Oct. 20, 2014) The United Nations says water is a human right, but should it be free? Detroit has cut off water to residents who can't pay, and the U.N. isn't happy. Video provided by Newsy
Powered by NewsLook.com
Hey, Doc! Sewage, Beer and Food Scraps Can Power Chevrolet’s Bi-Fuel Impala

Hey, Doc! Sewage, Beer and Food Scraps Can Power Chevrolet’s Bi-Fuel Impala

3BL Media (Oct. 20, 2014) Hey, Doc! Sewage, Beer and Food Scraps Can Power Chevrolet’s Bi-fuel Impala Video provided by 3BL
Powered by NewsLook.com
White Rhino's Death In Kenya Means Just 6 Are Left

White Rhino's Death In Kenya Means Just 6 Are Left

Newsy (Oct. 20, 2014) Suni, a rare northern white rhino at Ol Pejeta Conservancy, died Friday. This, as many media have pointed out, leaves people fearing extinction. Video provided by Newsy
Powered by NewsLook.com

Search ScienceDaily

Number of stories in archives: 140,361

Find with keyword(s):
Enter a keyword or phrase to search ScienceDaily for related topics and research stories.

Save/Print:
Share:

Breaking News:

Strange & Offbeat Stories


Plants & Animals

Earth & Climate

Fossils & Ruins

In Other News

... from NewsDaily.com

Science News

Health News

Environment News

Technology News



Save/Print:
Share:

Free Subscriptions


Get the latest science news with ScienceDaily's free email newsletters, updated daily and weekly. Or view hourly updated newsfeeds in your RSS reader:

Get Social & Mobile


Keep up to date with the latest news from ScienceDaily via social networks and mobile apps:

Have Feedback?


Tell us what you think of ScienceDaily -- we welcome both positive and negative comments. Have any problems using the site? Questions?
Mobile: iPhone Android Web
Follow: Facebook Twitter Google+
Subscribe: RSS Feeds Email Newsletters
Latest Headlines Health & Medicine Mind & Brain Space & Time Matter & Energy Computers & Math Plants & Animals Earth & Climate Fossils & Ruins