In this Grade 4 Social Studies Alive! California's Promise lesson, students learn how California addressed its water scarcity challenges as farms and cities expanded in the late 1800s and early 1900s. The lesson covers key concepts including groundwater, irrigation, surface water sources like the San Joaquin and Sacramento rivers, and vocabulary terms such as aqueduct, reservoir, drought, and levee. Students explore the compromises and engineering advances Californians made to distribute water across the state and why water usage remains a source of ongoing conflict.
Section 1
Settlers Create a Thirsty State
California's water story starts with its geography. Most of the state's rain and snow falls in the northern mountains. This water fills rivers and streams.
As California grew, many people built cities and farms in the sunny, flat lands of the Central Valley and Southern California. These areas were naturally very dry.
Section 2
Water Projects Lead to Conflict
Moving water to thirsty cities created big problems. When cities took water from far away, the people and places that lost the water were often left behind. This led to serious conflict between different groups.
For example, farmers in the Owens Valley fought against Los Angeles when their farms dried up. In the north, many people argued to protect the beautiful Hetch Hetchy Valley from being flooded by a dam for San Francisco's water.
Section 3
Californians Continue the Water Debate
Building the giant aqueducts was just the beginning of California's water story. The arguments over who gets water did not end, and this struggle continues today.
Modern California still faces big water challenges. When there is not enough rain or snow for a long time, the state can enter a drought. This means everyone must practice conservation, which is the careful saving of water.
Section 4
Local Water Sources Run Dry
As California's towns and farms grew, people first tried simple ways to get more water. They dug wells to pump groundwater from under the earth. They also built small canals to move water from nearby rivers.
But these local solutions created new troubles. So many wells were used that they started to run dry. Trying to control rivers sometimes caused dangerous floods. Near the coast, salty ocean water even began to leak into the fresh water supply. Californians realized they needed a bigger plan.
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Section 1
Settlers Create a Thirsty State
California's water story starts with its geography. Most of the state's rain and snow falls in the northern mountains. This water fills rivers and streams.
As California grew, many people built cities and farms in the sunny, flat lands of the Central Valley and Southern California. These areas were naturally very dry.
Section 2
Water Projects Lead to Conflict
Moving water to thirsty cities created big problems. When cities took water from far away, the people and places that lost the water were often left behind. This led to serious conflict between different groups.
For example, farmers in the Owens Valley fought against Los Angeles when their farms dried up. In the north, many people argued to protect the beautiful Hetch Hetchy Valley from being flooded by a dam for San Francisco's water.
Section 3
Californians Continue the Water Debate
Building the giant aqueducts was just the beginning of California's water story. The arguments over who gets water did not end, and this struggle continues today.
Modern California still faces big water challenges. When there is not enough rain or snow for a long time, the state can enter a drought. This means everyone must practice conservation, which is the careful saving of water.
Section 4
Local Water Sources Run Dry
As California's towns and farms grew, people first tried simple ways to get more water. They dug wells to pump groundwater from under the earth. They also built small canals to move water from nearby rivers.
But these local solutions created new troubles. So many wells were used that they started to run dry. Trying to control rivers sometimes caused dangerous floods. Near the coast, salty ocean water even began to leak into the fresh water supply. Californians realized they needed a bigger plan.
Book overview
Jump across lessons in the current chapter without opening the full course modal.
Continue this chapter