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The change in the total mass of ice on land, called the mass balance, is important because it causes changes in global sea level. High-precision gravimetry from satellites in low-noise flight has determined that in 2006, the Greenland and Antarctic ice sheets experienced a combined mass loss of 475 ± 158 Gt/yr, equivalent to 1.3 ± 0.4 mm/yr ...
California region, with its 10 4-digit subregion hydrologic unit boundaries. The California water resource region is one of 21 major geographic areas, or regions, in the first level of classification used by the United States Geological Survey in the United States hydrologic unit system, which is used to divide and sub-divide the United States into successively smaller hydrologic units.
During the 2011-2017 California drought, a record high drought, groundwater and its storage capabilities in the San Joaquin Valley saw a sharp decline. [26] From October 2011 to September 2015 measurements made on groundwater levels in the San Joaquin Valley's aquifers recorded a loss of 14 km 3 /year, a total of 56 km 3. [26]
Introduced tilapia (hybrid Mozambique × Wami) can tolerate the high salinity levels and pollution. [ 91 ] [ 92 ] As of 2014, other fresh and brackish water fish species lived in the rivers and canals that fed the Salton Sea, including redbelly tilapia , threadfin shad , carp , red shiner , channel catfish , white catfish , largemouth bass ...
The OpenHistoricalMap community has organized projects to map certain historical periods and themes in detail. Major contributions have included: Historical boundaries of U.S. states and counties , imported from the Atlas of Historical County Boundaries , a project of the William M. Scholl Center for American History and Culture at the Newberry ...
Halti (Finnish: Halti, rarely Haltiatunturi, Northern Sami: Háldičohkka, Swedish: Haldefjäll) is a fell at the border between Norway and Finland.The peak (elevation 1,365 m (4,478 ft)) of the fell, called Ráisduottarháldi, is in Norway, on the border Nordreisa Municipality and Gáivuotna Municipality (Kåfjord), about one kilometre (5 ⁄ 8 mile) north of the border with Finland. [2]
Big Chico Creek is a creek in northeastern California that originates near Colby Mountain in Lassen National Park. It flows 46 miles (74 km) [2] to its confluence with the Sacramento River in Butte County. The creek's elevation declines from 5,000 feet (1,500 m) above sea level at its head to 120 feet (37 m) where it joins the Sacramento River ...
All types of floods can occur in California, though 90 percent of them are caused by river flooding in lowland areas. [1] [2] Such flooding generally occurs as a result of excessive rainfall, excessive snowmelt, excessive runoff, levee failure, tsunami, poor planning or built infrastructure, or a combination of these factors. Below is a list of ...