Robert “Bob” M. Hagan, Ph.D. (1917-2002), internationally renowned for his expertise in the relationships between plants, water, soil and water use efficiency — specifically in the area of agricultural water use — was a professor of water science, an irrigationist in the California Agricultural Experiment Station and a statewide extension specialist in the California Agricultural Extension Service during a 50-year career with the University of California, Davis.
Stephen K. Hall (1951-2010) led the Association of California Water Agencies (ACWA) as its executive director from 1993 until retiring in 2007 from the effects of Amyotrophic Lateral Sclerosis (ALS), or Lou Gehrig’s disease. Hall continued to stay current on water issues and to advocate for legislation on ALS at the state Capitol until he died.
His motto became “As much as I can for as long as I can.”
William Hammond Hall (1846-1934) is credited with the first proposal of an integrated flood control system with levees, weirs and bypass channels for the Sacramento Valley after his appointment as the first California state engineer.
Owned by San Francisco, Hetch Hetchy Reservoir in Yosemite National Park provides water via water districts and private utilities to nearly 3 million people in 29 cities across the San Francisco Bay Area.
Due to its high altitude location and water supplied by snowmelt, water from the reservoir (provided by the Tuolumne River) does not require filtration. Stored in Hetch Hetchy Reservoir behind O’Shaughnessy Dam, the water is delivered by a gravity based system and aqueduct to the Bay Area.
Alex Hildebrand (1913-2012) had an understanding and knowledge of California’s South Delta and San Joaquin River bar none. After retiring early from a career as an engineer for Standard Oil of California, he moved his family to the San Joaquin Valley where he farmed for nearly 50 years while active in water issues and as an advocate for the area.
One of the largest hydroelectric facilities in the United States and a National Historic Landmark, Hoover Dam produces enough power to server more than 1.3 million people. The dam also helps with flood control, irrigation, and water storage along the Colorado River.
Clair A. Hill (1909-1998), a self-made engineer nicknamed “California’s Mr. Water,” built from the ground up an engineering firm that would merge to form the global consulting firm of CH2M HILL.
In 1938 in his hometown of Redding along the Upper Sacramento River in Northern California, he founded Clair A. Hill & Associates. Before merging with CH2M in 1971, the two firms had collaborated on many projects together, including the Lake Tahoe Advanced Wastewater Treatment Facility — the first of its kind in the world.
Julian B. Hinds (1881-1977) was Metropolitan Water District of Southern California’s general manager and chief engineer from 1941-1951, but began work on the Colorado River Aqueduct in 1929 soon after the district was organized.
Edward Hyatt Jr. (1888-1954) was the state engineer of California from 1927-1950. In a 1928 report he wrote titled “Water is the Life Blood of California — The Division of Engineering and Irrigation of the State Department of Public Works; What it Does and How it Operates,” he called the department the “building organization of California’s state government” and described successes, challenges and responsibilities of his position.
Hydroelectric power is generated by the ability to turn falling water into electricity and in California accounts for about 15 percent of the state’s power supply annually.
Hydroelectric power is produced when water turns a turbine connected to a generator. This water is stored behind a dam at elevation. Gravity causes water to drop toward a turbine propeller. The falling water turns the turbine which produces power through the connected generator.
In California, the State Water Project provides water for 25 million Californians and irrigation water for an estimated 750,000 acres of farmland. Along the way, it supports industries from agriculture to high tech that make the state a global economic powerhouse.
A hydrograph illustrates a type of activity of water during a specific time frame. Salinity and acidity are sometimes measured, but the most common types are stage and discharge hydrographs. These graphs show how surface water flow responds to fluxes in precipitation.