NASA | From the River to the Sea

The video discusses the decline in vegetation along the Colorado River and a historic agreement between the US and Mexico to release a pulse of water into the riverbed. This pulse flow in 2014 revitalized the ecosystem, replenishing groundwater and increasing vegetation. Scientists used satellite data to track these changes, noting significant increases in green vegetation. Future studies will focus on the long-term ecological impacts, including effects on bird populations.

What was the main purpose of the agreement between the US and Mexico regarding the Colorado River?

• To build a new dam

• To allow a pulse of water to flow into the Delta region

• To increase agricultural land

• To stop water flow to the Sea of Cortez

How much water was released through the Morellis Dam in 2014?

• 52,000 cubic meters

• 130,000,000 cubic meters

• 1,000,000 cubic meters

• 500,000 cubic meters

What was one of the immediate effects of the pulse flow on the riverbed?

• It filled the dry riverbed and replenished groundwater

• It led to a decrease in fish population

• It caused flooding in nearby towns

• It increased the salinity of the water

What tool did scientists use to track vegetation changes after the pulse flow?

• Aerial drones

• Landsat 8 satellite data

• Underwater sensors

• Ground surveys

What future aspect will scientists study regarding the pulse flow's impact?

• The increase in local tourism

• The impact on resident and migratory birds

• The effect on local fish species

• The change in river water temperature