they supposed to work 8 What has California done after Orovi

they supposed to work? (8) What has California done after Oroville Dam crisis? What have you leaned? (9)in plain English, describe different types of SCS rainfall distribution (10) In order to study hydrograph, we have rational, unit hydrograph, and synthetic unit hydrograph methods Please ug tice compare them.

Solution

8)Oroville DamSituated in the western foothills of the Sierra Nevada, the Oroville Dam is five miles northeast of the city of Oroville in California\'s Butte County.It\'s about 75 miles north of Sacramento and 160 miles northeast of San FranciscoThis earthen dam was built on the Feather River in 1968 to capture storm-water and snow-melt runoff from the Sierra Nevada and store it in Lake Oroville.The dam can hold back up to 3.5 million acre-feet of water in the expansive reservoir known as Lake Oroville. Runoff collected by the the North, Middle, and South Forks and the West Branches of the Feather River all pours into Lake Oroville.Oroville is the tallest dam in the United States, measuring 6,920 feet across and 770 feet high that\'s 44 feet taller than Hoover Dam. Lake Oroville is the second-largest man-made reservoir in California after Shasta.Together, the dam and lake are important for the state\'s flood control, water use and recreation.Regulating flows on the Feather River, the dam provides flood control for the eastern Sacramento Valley.Lake Oroville is a key gauge of the state\'s water health and plays an essential role in the State Water Project, a government water-delivery system that carries storm-water runoff from the Sierra Nevada to farmers in the Central Valley and residents and businesses that run from the South Bay to Southern California.What\'s more, fresh water releases from the lake control salinity intrusion into the Sacramento-San Joaquin Delta and protect the health of fish and wildlife.A moisture-packed storm drenched Northern California early last week, and a torrent of stormwater and snow melt poured into Lake Oroville. The lake reached full capacity.To make room in the reservoir and prevent flooding, water was released down the main spillway, a 3,000-foot-long concrete chute that dumps water into the Feather River.A gaping hole was discovered on the main spillway on Tuesday. Dam operators gingerly continued to release water, reducing the flow to prevent the main spillway from becoming inoperable. The hole grew into a massive crater measuring more than 300 feet wide and 500 feet long. As more stormwater flowed down from the mountains, the reservoir continued to swell and at 8 a.m. on Saturday, it began tumbling over the emergency spillway that had never been used in the 48-year history of the dam.