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Many species of fish, including those that are important to the U.S. economy, migrate from the ocean to freshwater rivers and streams to spawn. If they make it past strong river currents and hungry predators, these determined fish may then find themselves blocked by man-made barriers, such as dams. Special “fish ladders” are built to help fish pass over these dams so they can continue swimming upstream to reach their spawning grounds.
(Source: DCMP)
Investigates rivers and their impact on land. Shows how rivers and streams are formed, and how they carve channels into soil and rock. Discusses stream classifications, the fluvial process, the effect of gradient, and how waterfalls are formed. Preview of vocabulary recommended.
The seafloor has a diverse landscape, which includes underwater lakes and rivers. How is that possible? Well, these lakes and rivers form when seawater seeps up through thick layers of salt, which are present beneath the seafloor. As the water seeps up, it dissolves the salt layer, causing it to collapse and form depressions. The dissolved salt makes the water denser, and because it is denser than the water around it, it will settle into the depressions, forming a river or lake. Part of the "Deep Sea Dive" series.
While asleep, a young girl dreams that her computer teaches her about earth's geographic areas. Uses a globe to tell about areas of water (oceans, lakes, and rivers), land (mountains, forests, canyons, deserts, plains, and poles), and climates (cold, tropic, and moderate). Emphasizes that all areas and features of earth support life.
Part of the animated "Johan, the Young Scientist" series. Housebound during a rainy day, Johan goes to ScienScape where it also rains. Johan, Ani, and Moki set out to find where the rainwater ends up. This leads them from gutters to drains to rivers. They soon learn that all living beings need water to survive.
The Tennessee Aquarium in Chattanooga is a unique freshwater aquarium. Visitors learn how a river is formed, how fish live beneath its surface, and other fish facts. Showcases important world rivers and their fish. Introduces aquarium workers, food preparation, the quarantine area, and a control center. Notes the aquarium is a learning place from top to bottom.
Narration, song, and underwater photography capture the primary characteristics of fish: scales, gills, and fins. Shows how fish swim and how they protect themselves. Labels identify key words.
Describes the characteristics of river biomes and their diverse plant and animal life. Notes effects of their passage through varied geography and climates. Human impact on rivers remains both beneficial and harmful.
What is a hydrologist? The researchers in the A to Z Career Lab investigate the roles and responsibilities of hydrologists, and they report their findings to inquisitive students. Part of the "I Can Be Anything I Want to Be A to Z" series.
Why do some rivers run straight while others twist and bend? What causes ocean waves? What is a glacier made of? Dive in with The Standard Deviants as they discuss the role of water in geology. Part of "The Rockin' World of Geology" series.
Dr. Riki Ott is a whistle blower who predicted the Exxon Valdez oil spill before it happened. She is also a toxicologist, author, and activist who spent time organizing the Gulf Coast communities in response to the BP Deepwater Horizon disaster. Various citizen groups have followed Dr. Ott's example to change and strengthen efforts to curb oil pollution of America's lands, rivers, and coastal waters.
Diver Jill Heirnerth and a team of explorers and scientists explore the massive hidden underground rivers, caverns, and waters of the Floridan aquifer. The aquifer is essential for millions of people, and the team wants to study the impacts of generations of agriculture and urbanization. They are also checking the overall health of the aquifer.
Maritime archaeology is a discipline within archaeology that specifically studies human interaction with oceans, lakes, and rivers through the study of artifacts. Researchers trace the historical aspects of human dependence and influences on bodies of water. Some areas of interest include harvested goods from the sea, fishing techniques, transportation, and water quality. Part of the "Adventures of a Maritime Archaeologist" series.
An environmental scientist who provides clean water to the city of Philadelphia explains how this water is used in homes, parks, and swimming pools and to fight fires. Shows that river water from rain and farm runoff is dirty and needs to be purified before people can use it. Visits the Fairmount Water Works and explains how water is brought to such plants, purified, and sent on to homes and factories. Also, emphasizes why caring about the health and safety of rivers are important.
In the 1950's, the Soviets decide to turn the vast desert steppes of Kazakhstan and Uzbekistan into fields of cotton and wheat. They diverted some of the rivers that feed the lake to irrigate the new crops. This depleted the Aral Sea, and in 1987, the level of the water falls so low that the sea splits into two bodies of water. It splits again in 2002. In 2014, the eastern part of the Aral Sea disappears forever, which causes an ecological disaster. Part of the "Butterfly Effect" series.
Marine debris comes from many different sources and enters the ocean in many ways. Intentional littering and dumping are big causes. Sometimes the trash goes directly into the ocean, and sometimes marine debris is indirectly generated in a city hundreds of miles from the ocean. When someone litters on the street or parking lot, rainwater can move the trash into storm drains that empty into streams, rivers, and other bodies of water. Improper or careless waste disposal also contributes to this environmental concern. Part of the "Trash Talk" series.
Everywhere one looks in Southern Louisiana there's water: rivers, bayous, swamps, the Mississippi River, and the Gulf of Mexico. And everyone in Cajun Country has a water story, or two or three or more. Its waterways support the biggest economies in Louisiana - a $70 billion a year oil and gas industry, a $2.4 billion a year fishing business, tourism and recreational sports. But these waterways are also home to some insidious polluters along a 100-mile-long stretch of the Mississippi known "Cancer Alley," the world's largest Dead Zone in the Gulf of Mexico and erosion that is costing the coastline twenty five square miles of wetlands a year.
Moko is an explorer. As he travels the world continent by continent, he makes many friends and discovers many natural phenomena which sometimes delight him, and other times scare him. Each animated episode recounts an adventure and takes an "original story" approach to explaining these natural phenomena. In this episode, Moko and Mei-Lei are gathering seashells in between the rocks on the white sand beach to decorate the village's houses. Moko asks Mei-Lei if they can go to other beaches to try to find other shells. Mei-Lei likes the idea and goes to ask a fisherman to take them to another beach on his boat. Just beyond the village Moko sees a vast plain that has been flooded with water. He thinks this must have been the great wave, flooding the field with water so that the rice would grow. This is when Mei-Lei picks up a magnificent seashell and Moko believes that it must surely be a gift from the ocean. Moko and Mei-Lei make their way back home, carrying their gift and happy to have seen wonderful new places. They are certain that the ocean must know an underground passage in which it sends waves every now and then to feed the rivers and the fields.
