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Aliso Creek Canyon
Aliso Canyon is a canyon located in Orange County, California in the United States. The canyon is a water gap across the San Joaquin Hills carved out by Aliso Creek, possibly as recently as the last ice age. Located in a semi-arid climate, it supports a variety of plant communities – mainly chaparral and coastal sage scrub – and native animals, some endangered. The canyon's northern divide once formed a formidable boundary between the indigenous Acjachemen and Tongva. Many Acjachemen archaeological sites have been found in the canyon. The fertile alluvial soil and grasslands of Aliso Canyon was used for orchards and grazing from Spanish conquest of the region until the early 20th century. Since the 1970s, the canyon has been the centerpiece of Aliso and Wood Canyons Wilderness Park. Aliso Canyon has also suffered environmental damage in recent years. Upstream urban development since the 1950s has increased urban runoff into Aliso Creek, causing severe erosion throughout ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Aliso And Wood Canyons Wilderness Park
Aliso and Wood Canyons Wilderness Park is a major regional park in the San Joaquin Hills of Orange County, California in the United States. Comprising of rugged coastal canyons, open grassland, and riparian woodland, the park borders the suburban cities of Aliso Viejo, Dana Point, Laguna Beach, Laguna Hills and Laguna Niguel and lies within a portion of the ancestral homeland of the indigenous Acjachemen people. Aliso and Wood Canyons is part of a larger park complex known as the South Coast Wilderness. Surrounded by heavy suburban development and the Pacific Ocean, it is an important regional wildlife preserve. The park includes trails for hiking, mountain biking, and horseback riding; a greenbelt and bikeway along Aliso Creek; and various geological features such as caves, springs, and exposed marine fossil beds. The park is administered by the County of Orange under the OC Parks Department. The name ''Aliso'' originated in the 18th century when Spanish explorers named Aliso ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Environmental Damage
Environmental degradation is the deterioration of the environment through depletion of resources such as quality of air, water and soil; the destruction of ecosystems; habitat destruction; the extinction of wildlife; and pollution. It is defined as any change or disturbance to the environment perceived to be deleterious or undesirable. Environmental concerns can be defined as the negative effects of any human activity on the environment. The biological as well as the physical features of the environment are included. Some of the primary environmental challenges that are causing great worry are air pollution, water pollution, natural environment pollution, rubbish pollution, and so o Environmental degradation is one of the ten threats officially cautioned by the High-level Panel on Threats, Challenges and Change, high-level PaneI on Threats, Challenges and Change of the United Nations. The United Nations International Strategy for Disaster Reduction defines environmental degra ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Wisconsinian Glaciation
The Wisconsin Glacial Episode, also called the Wisconsin glaciation, was the most recent glacial period of the North American ice sheet complex. This advance included the Cordilleran Ice Sheet, which nucleated in the northern North American Cordillera; the Innuitian ice sheet, which extended across the Canadian Arctic Archipelago; the Greenland ice sheet; and the massive Laurentide Ice Sheet, which covered the high latitudes of central and eastern North America. This advance was synchronous with global glaciation during the last glacial period, including the North American alpine glacier advance, known as the Pinedale glaciation. The Wisconsin glaciation extended from approximately 75,000 to 11,000 years ago, between the Sangamonian Stage and the current interglacial, the Holocene. The maximum ice extent occurred approximately 25,000–21,000 years ago during the last glacial maximum, also known as the ''Late Wisconsin'' in North America. This glaciation radically altered the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Aliso Viejo, California
Aliso Viejo (Spanish for "Old Sycamore") is a city in the San Joaquin Hills of southern Orange County, California. It had a population of 47,823 as of the 2010 census, up from 40,166 as of the 2000 census. It became Orange County's 34th city on July 1, 2001, the only city in Orange County to be incorporated since 2000. It is bordered by the cities of Laguna Beach on the west and southwest, Laguna Hills on the east, Laguna Niguel on the southeast, and Laguna Woods on the north. History The planned community of Aliso Viejo's original were once part of the Moulton Ranch, owned by the Moulton family, who took title in the 1890s to land originally granted to Juan Avila by the Mexican government in 1842. Over the years, portions of the ranch were sold and became Leisure World, Laguna Hills and Laguna Niguel. In 1976, the Mission Viejo Company purchased the remaining 6,600 acres to create a new planned community – Aliso Viejo – with a master plan for 20,000 homes for ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Laguna Niguel, California
Laguna Niguel () is a city in Orange County, California, United States. The name Laguna Niguel is derived from the words "Laguna" (Spanish for "lagoon") and "Niguili" (the name of a Native American village once located near Aliso Creek). As of the 2020 census, the population was 64,355. Laguna Niguel is located in the San Joaquin Hills in the southeastern corner of Orange County, close to the Pacific Ocean, and borders the cities of Aliso Viejo, Dana Point, Laguna Beach, Laguna Hills, Mission Viejo, and San Juan Capistrano. Laguna Niguel has its origins in the Rancho Niguel Mexican land grant, which was acquired in 1959 by the Laguna Niguel Corporation to develop one of California's first master-planned communities. As a predominantly residential city, Laguna Niguel serves as a bedroom community for the job centers of northern and central Orange County. Laguna Niguel has a median household income 31 percent above the Orange County average and nearly double the U.S. avera ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sewage Treatment
Sewage treatment (or domestic wastewater treatment, municipal wastewater treatment) is a type of wastewater treatment which aims to remove contaminants from sewage to produce an effluent that is suitable for discharge to the surrounding environment or an intended reuse application, thereby preventing water pollution from raw sewage discharges. Sewage contains wastewater from households and businesses and possibly pre-treated industrial wastewater. There are a high number of sewage treatment processes to choose from. These can range from decentralized systems (including on-site treatment systems) to large centralized systems involving a network of pipes and pump stations (called sewerage) which convey the sewage to a treatment plant. For cities that have a combined sewer, the sewers will also carry urban runoff (stormwater) to the sewage treatment plant. Sewage treatment often involves two main stages, called primary and secondary treatment, while advanced treatment also incor ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Wood Canyon Creek
Wood Canyon Creek is a perennial stream in Aliso and Wood Canyons Wilderness Park, Orange County, California. A tributary of Aliso Creek, it drains a deep undeveloped valley to the west of Aliso Viejo. The Wood Canyon was populated by the Acjachemen tribe hundreds of years ago; many archaeological sites along the creek provide evidence of their habitation. Spanish explorers and colonists arrived in the mid-18th century, establishing missions and a rancho that extended around the Aliso Creek watershed. Wood Canyon was used first as a cattle grazing area; after California became part of the United States, it was used to graze sheep. From the 1960s onward, the creek's flow has been heavily affected by urban runoff from suburban residential development. The Wood Canyon watershed drains a portion of the San Joaquin Hills, a short coastal mountain range that uplifted beginning in the mid-Pleistocene (1.22 MYA). Course The Wood Canyon Creek now begins slightly south of California St ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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] |
Laguna Canyon
Laguna Canyon (also called Cañada de las Lagunas, meaning "Lake Canyon" in Spanish) is a canyon that cuts through the San Joaquin Hills in southern Orange County, California, in the United States, directly south of the city of Irvine. The canyon runs from northeast to southwest, and is drained on the north side by tributaries of San Diego Creek and on the south by Laguna Canyon Creek. It is deeper and more rugged on the southwestern end near Laguna Beach. Geologically, the canyon likely originated millions of years ago as the result of San Diego Creek cutting through the San Joaquin Hills. Uplift diverted that stream to its present course, leaving Laguna Canyon as a wind gap. California State Route 133 runs the entire length of the canyon connecting Laguna Beach and Irvine, while California State Route 73 crosses it, running southeast–northwest. A majority of the canyon is located within the Laguna Coast Wilderness Park; small portions are part of Aliso and Wood Canyons Wilder ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Laguna Niguel Regional Park
Laguna Niguel Regional Park is a public park in Laguna Niguel, in southern Orange County, California. Its main feature is Laguna Niguel Lake (also known as Sulphur Creek Reservoir), located within the park's boundaries. Laguna Niguel's 4th of July fireworks show is held at the park every year. History The park was established for public use in 1973. Since then, it has had several developments. In 1976, a lake concession building and boat dock were constructed by the county. In 1981, local S&S Construction Company donated an additional of land for county use. The donation included "Kite Hill". In June 1983, a gazebo was built on the top of the scenic turnaround overlooking the park. In October 1984, many new additions were constructed, including: new front park entrance sign, landscaping, planting California Sycamore trees, reforestation of approximately 2,000 trees throughout the entire park, bicycle trails, additional picnic shelters, two creek crossing pedestrian brid ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Drop Structure
A drop structure, also known as a grade control, sill, or weir, is a manmade structure, typically small and built on minor streams, or as part of a dam's spillway, to pass water to a lower elevation while controlling the energy and velocity of the water as it passes over. Unlike most dams, drop structures are usually not built for water impoundment, diversion or raising the water level. Mostly built on watercourses with steep gradients, they serve other purposes such as water oxygenation and erosion prevention. Typical designs Drop structures can be classified into three different basic types: "vertical hard basin", "grouted sloping boulder", and "baffle chute". Each type is built depending on water flow, steepness of the site, and location. Vertical hard basin The vertical hard basin drop structure, also called a ''dissipation wall'', is the basic type of drop structure. The vertical hard basin drop consists of a vertical "cutoff wall", usually built of concrete, that is usua ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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