The nearly 10 million people in the city and county of Los Angeles, California require a lot of water - most of which is imported snow melt from the Eastern Sierra Nevadas and Rocky Mountains, hundreds of miles away. UCLA researchers Stephanie Pincetl and Mark Gold are studying how Los Angeles can reduce its water imports and better capture, store and reuse water for a more sustainable water supply.
The National Science Foundation and NBC Learn explore the threats and challenges to our most vital natural resource.
Farmers in Kansas and other states that sit atop the Ogallala aquifer - the largest freshwater aquifer in North America - are pumping out water for crop irrigation far faster than natural seepage of rainwater can replenish it. Scientist David Hyndman from Michigan State University is helping develop a plan to better manage this vital resource for sustainable farming.
Part of the earth's largest surface freshwater system, Lake Erie is a vital source of drinking water for 11 million people. Researchers Anna Michalak, Tom Bridgeman, and Pete Richards are studying how farming practices and severe weather can increase the amount of fertilizer-derived nutrients in the water, which diminishes water quality and threatens the lake's ecosystem and the public's health.
Snow melt from the snow pack in the Sierra Nevada mountain range provides drinking water to about 30% of California's residents, irrigates key crops in the San Joaquin valley, and runs hydroelectric power plants that supply at least 15% of the state's electricity. Scientists Martha Conklin and Tom Harmon of the University of California, Merced are conducting research at the Southern Sierra Critical Zone Observatory, using wireless sensor technology to more accurately measure snow pack and snow melt so that state water managers can make better decisions on how to allocate this precious resource.
The Rocky Mountains supply water to more than 60 million homes in the West, but this crucial water shed is in peril due to a tiny insect called the mountain pine beetle.
Baltimore, Maryland is a major city situated on the Chesapeake Bay- a sprawling 64,000 square mile watershed. Currently, the Chesapeake is facing an environmental crisis due to pollutants. Scientist Claire Welty of the University of Maryland-Baltimore County is monitoring the travel times of pollutants in the urban streams in and around Baltimore. Through her research, she hopes to gain an understanding of the urban water cycle, and how municipalities can better prevent pollutants from contaminating the greater watershed.
This video uses animation, graphics, and video clips to illustrate and explain each of the "flow" and "storage" processes in the Hydrologic Cycle, more commonly known as the Water Cycle: precipitation, interception, runoff, infiltration, percolation, groundwater discharge, evaporation, transpiration, evapotranspiration, and condensation.