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San Juan Creek
San Juan Creek, also called the San Juan River, is a long stream in Orange and Riverside Counties, draining a watershed of .7.5 Minute Quadrangle Map, U.S. Geological Survey, San Juan Capistrano, 1968, photorevised 1981 Its mainstem begins in the southern Santa Ana Mountains in the Cleveland National Forest. It winds west and south through San Juan Canyon, and is joined by Arroyo Trabuco as it passes through San Juan Capistrano. It flows into the Pacific Ocean at Doheny State Beach. San Juan Canyon provides a major part of the route for California State Route 74 (the Ortega Highway). Before Spanish colonization in the 1770s, the San Juan Creek watershed was inhabited by the Acjachemen or Juañeno Native Americans. The Juañeno were named by Spanish missionaries who built Mission San Juan Capistrano on the banks of a stream they named San Juan Creek. The watershed was used mainly for agriculture and ranching until the 1950s when residential suburban development began on a large ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
San Juan Canyon
San Juan Creek is a creek in Orange County in the U.S. state of California. It is about long, and along with its major tributary, Trabuco Creek, drains near the southernmost extent of Orange County. This article describes the course of San Juan Creek. Headwaters to San Juan Canyon San Juan Creek begins in the southern Santa Ana Mountains, a few miles northwest of Lake Elsinore. Its highest elevation is above sea level. Paralleling the Ortega Highway (California State Route 74) the creek flows erratically south, west and occasionally northwest. In the furthest upper reaches of the watershed, the creek is typically ephemeral. The creek channel in the uppermost few miles is a narrow mountain stream with many rapids and waterfalls, which include a series of large cascades, known as San Juan Falls. There are little alluvial deposits in the canyons, and the creek mostly cascades over bedrock. In this upper reach, the pool-and-riffle stream channel structure is evident. There are a few ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Trampas Canyon
Trampas Canyon is a short tributary of San Juan Creek in southern Orange County the U.S. state of California. It rises in forks on steep slopes of the southern Santa Ana Mountains (), and flows north to where it is dammed by Trampas Canyon Dam (USGS San Clemente Quad 7½"). Trampas Canyon 1795-006 Dam () forms a small lake that branches into four forks running east–west. Exiting the dam, the creek flows north and turns slightly to the west, where it joins San Juan Creek on the left bank, near the confluence of Cañada Gobernadora (). Trampas Canyon Creek is ephemeral and only flows during storm events or while Trampas Canyon Dam is releasing, and is not a primary tributary of San Juan Creek. A study was prepared in 1999 by the City of San Juan Capistrano, and it was found that a failure of the earthen Trampas Canyon Dam would do more damage to the lower course of San Juan Creek than for a 100 year flood. A failure would cause a floodwave over wide to rush down the lower of Sa ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bell Canyon
Bell Canyon is a major drainage of the Santa Ana Mountains in Orange County, California in the United States. Bell Creek (also known as Bell Canyon Creek or Arroyo de las Campanas) flows about in a southerly direction to its confluence with San Juan Creek. The Bell Canyon drainage is located to the east and parallel to Cañada Gobernadora, and to the south of Trabuco Creek. After Trabuco Creek, it is the second largest tributary of San Juan Creek in terms of length and its watershed area of . Most of Bell Canyon consists of wilderness in the Cleveland National Forest and Ronald W. Caspers Wilderness Park. The valley is more than deep and averages a mile (1.61 km) wide, and is joined by the major tributaries of Dove Canyon, Crow Canyon and Tick Creek. Human history The Juaneño or ''Acagchemem'' Native Americans have lived in the Bell Canyon area for almost 10,000 years, from archeology at the San Dieguito complex. It is said they would strike rocks against boulders in t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Arroyo Trabuco
Arroyo Trabuco (known also as Trabuco Creek) is a -long stream in coastal southern California in the United States. Rising in a rugged canyon in the Santa Ana Mountains of Orange County, the creek flows west and southwest before emptying into San Juan Creek in the city of San Juan Capistrano. Arroyo Trabuco's watershed drains of hilly, semi-arid land and lies mostly in Orange County, with a small portion extending northward into Riverside County. The lower section of the creek flows through three incorporated cities and is moderately polluted by urban and agricultural runoff. Acjachemen and Payómkawichum people lived along the perennial stream in settlements and hunting camps for 8,000 years before the invasion of Spanish colonization. Villages along the creek included Alauna and Putiidhem. ''Trabuco'' is Spanish for a Blunderbuss, a type of shotgun. Local legend attributes a Franciscan missionary friar traveling with the Gaspar de Portolà Expedition in 1769 for the story ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cañada Gobernadora
Cañada Gobernadora is a tributary to San Juan Creek, about long, in southern Orange County in the U.S. state of California. The creek begins in the foothills of the Santa Ana Mountains (), at an elevation of , and flows south through residential, agricultural and finally undeveloped land, to its confluence with San Juan Creek a few miles upstream of the city of San Juan Capistrano (). The upper half of the stream is largely channelized and flows through golf courses, while the lower half is a wash-like channel that can be up to wide. The stream receives some urban runoff from the residential communities higher in its watershed. The watershed includes several geologic formations, including the Tertiary Sespe Formation and Santiago Formation, and Holocene sedimentary and alluvial deposits embedded in its narrow floodplain. Cañada Gobernadora forms an unofficial dividing line for the lower portion of the San Juan watershed; most urban development is confined to west of the creek's ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bell Canyon Creek
Bell Canyon is a major drainage of the Santa Ana Mountains in Orange County, California in the United States. Bell Creek (also known as Bell Canyon Creek or Arroyo de las Campanas) flows about in a southerly direction to its confluence with San Juan Creek. The Bell Canyon drainage is located to the east and parallel to Cañada Gobernadora, and to the south of Trabuco Creek. After Trabuco Creek, it is the second largest tributary of San Juan Creek in terms of length and its watershed area of . Most of Bell Canyon consists of wilderness in the Cleveland National Forest and Ronald W. Caspers Wilderness Park. The valley is more than deep and averages a mile (1.61 km) wide, and is joined by the major tributaries of Dove Canyon, Crow Canyon and Tick Creek. Human history The Juaneño or ''Acagchemem'' Native Americans have lived in the Bell Canyon area for almost 10,000 years, from archeology at the San Dieguito complex. It is said they would strike rocks against boulders in t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Urban Runoff
Urban runoff is surface runoff of rainwater, landscape irrigation, and car washing created by urbanization. Impervious surfaces (roads, parking lots and sidewalks) are constructed during land development. During rain , storms and other precipitation events, these surfaces (built from materials such as asphalt and concrete), along with rooftops, carry polluted stormwater to storm drains, instead of allowing the water to percolate through soil. This causes lowering of the water table (because groundwater recharge is lessened) and flooding since the amount of water that remains on the surface is greater.Water Environment Federation Alexandria, VA; an American Society of Civil Engineers Reston, VA [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Acjachemen
The Acjachemen (, alternate spelling: Acagchemem) are an Indigenous people of California. They historically lived south of what is known as Aliso Creek and north of the Las Pulgas Canyon in what are now the southern areas of Orange County and the northwestern areas of San Diego County. The Spanish colonizers called the Acjachemen ''Juaneños'', following their baptism at Mission San Juan Capistrano in the late 18th century. Today many contemporary members of the tribe prefer the term ''Acjachemen'' as their autonym, or name for themselves. The name is derived from the village of Acjacheme, which was less than sixty yards from the site where Mission San Juan Capistrano was built in 1776. Their language was a variety closely related to the Luiseño language of the nearby Payómkawichum (Luiseño) people. In the 20th century, the Juaneño Band of Mission Indians, Acjachemen Nation was organized but is not federally recognized. The lack of federal recognition has prevented the A ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Floodplain
A floodplain or flood plain or bottomlands is an area of land adjacent to a river which stretches from the banks of its channel to the base of the enclosing valley walls, and which experiences flooding during periods of high discharge.Goudie, A. S., 2004, ''Encyclopedia of Geomorphology'', vol. 1. Routledge, New York. The soils usually consist of clays, silts, sands, and gravels deposited during floods. Because the regular flooding of floodplains can deposit nutrients and water, floodplains frequently have high soil fertility; some important agricultural regions, such as the Mississippi river basin and the Nile, rely heavily on the flood plains. Agricultural regions as well as urban areas have developed near or on floodplains to take advantage of the rich soil and fresh water. However, the risk of flooding has led to increasing efforts to control flooding. Formation Most floodplains are formed by deposition on the inside of river meanders and by overbank flow. Whereve ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Urbanization
Urbanization (or urbanisation) refers to the population shift from rural to urban areas, the corresponding decrease in the proportion of people living in rural areas, and the ways in which societies adapt to this change. It is predominantly the process by which towns and cities are formed and become larger as more people begin living and working in central areas. Although the two concepts are sometimes used interchangeably, urbanization should be distinguished from urban growth. Urbanization refers to the ''proportion'' of the total national population living in areas classified as urban, whereas urban growth strictly refers to the ''absolute'' number of people living in those areas. It is predicted that by 2050 about 64% of the developing world and 86% of the developed world will be urbanized. That is equivalent to approximately 3 billion urbanites by 2050, much of which will occur in Africa and Asia. Notably, the United Nations has also recently projected that nearly all gl ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cleveland National Forest
Cleveland National Forest encompasses 460,000 acres (), mostly of chaparral, with a few riparian areas. A warm dry mediterranean climate prevails over the forest. It is the southernmost U.S. National Forest of California. It is administered by the U.S. Forest Service, a government agency within the United States Department of Agriculture. It is divided into the Descanso, Palomar and Trabuco Ranger Districts and is located in the counties of San Diego, Riverside, and Orange. History The Kumeyaay, Payómkawichum, Cahuilla, and Cupeño long inhabited various areas of the forest. They lived on various forms of food, including acorns and local wildlife. Many of the Cleveland National Forest's trails are built following the routes developed by these Indigenous peoples. Cleveland National Forest was created on July 1, 1908 with the consolidation of Trabuco Canyon National Reserve and San Jacinto National Reserve by President Theodore Roosevelt and named after former president Grov ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
