USA and Mexico

USA and Mexico

Courtsey of University of Maryland Global Land Cover Facility.

http://visibleearth.nasa.gov/view_rec.php?id=16560


The Amistad International Water Reservoir is located on the Rio Grande in Texas along the border of the United States and Mexico. The reservoir was bult in the 1960s to regulate waterflow downstream.

This pair of Landsat images of Amistad shows the changes in the lake level between 1987 and 2000. In the spring of 1987 the reservoir showed a healthy water supply, but by late 2000 the water levels had dropped dramatically. This trend has continued.

Reduced water levels are the result of a combination of circumstances. First and foremost, the area is in the midst of a major drought. Additionaly, increased population growth due to factories in northern Mexico. The population of the Rio Grande valley in Texas has doubled in the last thirty years, but the water supply has remained the same.