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TAAP Map, US Geological Survey
Date Published: June 13, 2015
Status: Active

Transboundary Aquifer Assessment Program (TAAP)

Transboundary aquifers are an essential source of water for United States – Mexico border communities. Declining water levels, deteriorating water quality, and increasing use of groundwater resources on both sides of the border raise concerns about the long-term availability of this supply.

The U.S. – Mexico Transboundary Aquifer Assessment Act (Public Law 109-448) of 2006 was enacted...

Filter Total Items: 198
Image: Debris Flow from 2006 Floods in Southern Arizona
September 1, 2006

Debris Flow from 2006 Floods in Southern Arizona

This photograph shows the snout of a debris flow that stopped in the channel of Rattlesnake Creek during the floods of July 31, 2006. This snout is several miles upstream from the confluence of Rattlesnake and Sabino Creeks, and the large boulders are typical of the largest particles transported during debris flows in the southern Santa Catalina Mountains. Most of these

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Attribution: Natural Hazards
Image: Santa Catalina Highway, near Tucson, Southern Arizona - 2006
August 12, 2006

Santa Catalina Highway, near Tucson, Southern Arizona - 2006

Two ranging poles were placed near the positions of two sets of saguaros in order to determine their heights, and hence approximate ages. Most were established in the 1890s, after livestock grazing and the removal of fine fuels had begun in the area. Several small saguaros have become established since the fire; one is to the left of the left-hand ranging pole,

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July 29, 2006

Flood Measurement on Rillito River (2006)

USGS employees measuring flood flows on Rillito River in Tucson, Arizona.

July 29, 2006

Flood Measurement Using ADCP (2006)

USGS employees taking flood measurements using an Acoustic Doppler Current Profiler.

July 28, 2006

Flooding in Tucson, AZ (2006)

Measuring floods in Tucson, AZ 2006.

February 23, 2006

PubTalk 2/2006 — Science and Natural Resources along La Frontera

By Floyd Gray, Geologist

  • Natural systems-water, geology, and wildlife-tend to cross the 1,900- mile-long arbitrary political border between Mexico and the U.S.
  • Rapid population growth on the U.S. side and in Mexican border cities is creating a variety of environmental, ecological, and human health problems
  • The San Pedro River
...
Hydrologist sampling for sediment and turbidity, Little Colorado River, Grand Canyon
December 31, 2005

Hydrologist sampling for sediment and turbidity, Little Colorado River

Here, a U.S. Geological Survey (USGS) hydrographer is collecting a suspended-sediment water sample from the Little Colorado River, a kilometer upstream from the Little Colorado River, Grand Canyon, Arizona, USA. To gain knowledge of the suspended-sediment characteristics of the entire river (water quality can vary greatly across a river), suspended-sediment water samples

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Attribution: Water Resources
August 22, 2005

Flood Measurement on Santa Cruz River (1993 and 2005)

Two historic flood measurements are made on the Santa Cruz River in Tucson, Arizona for the 1993 and 2005 floods.

Image: Drought and Beetle-Killed Piñon Pines in Arizona
May 4, 2005

Drought and Beetle-Killed Piñon Pines in Arizona

Drought and beetle-killed piñon pines in Walnut Canyon National Monument near Flagstaff, Arizona, amid some surviving trees. Forest drought stress is highly correlated with mortality from poor growth, bark beetle outbreaks, and high-severity fire.

Image: Drought and Beetle-Killed Piñon Pines in Arizona
May 4, 2005

Drought and Beetle-Killed Piñon Pines in Arizona

Drought and beetle-killed piñon pines in Walnut Canyon National Monument near Flagstaff, Arizona, amid a few surviving trees. Forest drought stress is strongly correlated with tree mortality from poor growth, bark beetle outbreaks, and high-severity fire.

Image: A Hermit Thrush on the Nest in Arizona
May 1, 2005

A Hermit Thrush on the Nest in Arizona

Hermit thrushes are a songbird species that was strongly affected by plant community changes in mountains because of reduced snowpack and cascading ecological effects, according to a USGS Montana Cooperative Wildlife Research Unit study.

Photo of sphere-like grains found on Mars
December 31, 2004

Sphere-like grains found on Mars, nicknamed "Blueberries"

Photo taken by Opportunity of Sphere-like grains nicknamed "Blueberries", due to their shape. Photo is a mosaic of PANCAM and MI instruments.

Filter Total Items: 180
USGS science for a changing world logo
May 4, 2006

One of every four fishes in streams of 12 western states is non-native, according to a U.S. Geological Survey (USGS) study published in November 2005 in the North American Journal of Fisheries Management. 

USGS
May 4, 2006

One of every four fishes in streams of 12 western states is non-native, according to a U.S. Geological Survey (USGS) study published in November 2005 in the North American Journal of Fisheries Management. And, researchers found, it´s not just that there are a lot of non-native fishes but they are also widespread...

USGS science for a changing world logo
February 14, 2006

What are the issues desert tortoises face, and what has been learned and accomplished?

USGS
February 14, 2006

A symposium that focuses on the issues, research and management of the desert tortoise in the deserts of the southwestern United States and Mexico.

USGS
February 8, 2006

Ensuring stable water supplies has grown more complex as the challenges facing water managers continue to mount, especially in the West. Informed decisions of water users and public officials will be necessary to ensure sufficient freshwater resources in the future to support a growing population and economy. 

USGS science for a changing world logo
October 25, 2005

Today, the USGS released The State of the Colorado River Ecosystem in Grand Canyon, a comprehensive report that details the impacts of the operation of Glen Canyon Dam and other management actions on downstream resources within Grand Canyon National Park.

USGS
October 25, 2005

Today, the USGS released The State of the Colorado River Ecosystem in Grand Canyon, a comprehensive report that details the impacts of the operation of Glen Canyon Dam and other management actions on downstream resources within Grand Canyon National Park.

USGS science for a changing world logo
August 24, 2005

A new U.S. Geological Survey (USGS) report estimates that 15 to 20 percent of average annual recharge to aquifers occurs along the normally dry (ephemeral-flow) washes in the Sierra Vista area.

USGS
August 24, 2005

A new U.S. Geological Survey (USGS) report estimates that 15 to 20 percent of average annual recharge to aquifers occurs along the normally dry (ephemeral-flow) washes in the Sierra Vista area.

USGS
August 1, 2005

In its latest report on water use in the United States, the USGS looked at the nation's dependence on ground water. The report entitled Estimated Withdrawals from Principal Aquifers in the United States, 2000, provides details of ground-water withdrawals and use from principal aquifers in each state.

USGS science for a changing world logo
May 23, 2005

The USGS’s Grand Canyon Monitoring and Research Center (GCMRC), under the auspices of the Glen Canyon Dam Adaptive Management Program, will conduct scientific overflights in Grand Canyon National Park over Memorial Day weekend.

USGS
May 23, 2005

The USGS’s Grand Canyon Monitoring and Research Center (GCMRC), under the auspices of the Glen Canyon Dam Adaptive Management Program, will conduct scientific overflights in Grand Canyon National Park over Memorial Day weekend.