1.
Bay
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A bay is a recessed, coastal body of water that directly connects to a larger main body of water, such as an ocean, lake, or another bay. A large bay may be called a gulf, sea, sound, a cove is a type of smaller bay with a circular inlet and narrow entrance. A fjord is a particularly steep bay shaped by glacial activity, bays can be the estuary of a river, such as the Chesapeake Bay, an estuary of the Susquehanna River, which is the largest bay in North America. Bays may also be nested within each other, for example, some large bays, such as the Bay of Bengal and the Hudson Bay, have varied marine geology. The land surrounding a bay often reduces the strength of winds, bays were significant in the history of human settlement because they provided a safe place for fishing. Later they were important in the development of sea trade as the safe anchorage they provide encouraged their selection as ports, there are various ways from which bays can be created. The largest bays have developed as a result of plate tectonics, as the super-continent Pangaea broke up along curved and indented fault lines, the continents moved apart and the worlds largest bays formed. These include the Gulf of Guinea, Gulf of Mexico and the Bay of Bengal, another way bays form is via glacial and river erosion. A bay formed by a glacier is a fjord, rias are created by rivers and are characterised by more gradual slopes. Currents can make waves more constant, and soft rocks speed erosion, hard rock eroded less quickly, leaving headlands. The Gulf of California is an example of a bay created by plate tectonics as Baja California peninsula moves away from the Mexican mainland, Bay platform Great capes Headlands and bays
2.
San Pablo Bay
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San Pablo Bay is a tidal estuary that forms the northern extension of San Francisco Bay in the East Bay and North Bay regions of the San Francisco Bay Area in northern California. San Pablo Bay was named after Rancho San Pablo, a Spanish land grant given to colonial Alta California settlers in 1815, the bay is approximately 10 mi across and has an area of approximately 90 sq mi. The bay is heavily silted from the contributions of the two rivers, which drain most of the Central Valley of California. All tributaries except for Sonoma Creek are commercially navigable and maintained by the U. S. Army Corps of Engineers, two peninsulas separate San Pablo Bay from San Francisco Bay. The eastern is in the City of Richmond and the western in the City of San Rafael, the bay is shared between Contra Costa county on the southern and eastern shore, and Solano, Sonoma and Marin counties on the northern and western shores. The county boundaries meet near the center of the bay, communities on the shores of San Pablo Bay include, Richmond, San Pablo, Pinole, Hercules, Rodeo in Contra Costa County, Vallejo in Solano County, along with Novato and San Rafael in Marin County. Because the Bay is close to major and local airports. Because of its size but shallow waters, San Pablo Bay frequently has difficult boating conditions. There are many undeveloped shore lands with salt marshes and mudflats, the Bay is a primary wintering stop for the canvasback duck population on the Pacific Flyway, as well as a migratory staging ground for numerous species of waterfowl. Much of the shore of the bay is protected as part of the San Pablo Bay National Wildlife Refuge. Endangered species that are found in the bay include the California brown pelican, California clapper rail and this is a popular destination for recreation fishing, with Saltwater species including, striped bass, surfperch, sturgeon, starry flounder, leopard shark, topsmelt, and anchovy. In the 1880s there was a village, where some 500 Chinese people lived. The location is now part of China Camp State Park, San Pablo Bay is the setting of alternative rock band Primuss four-part song series Fishermans Chronicles, and is also referenced in The Toys Go Winding Down and Harold of the Rocks. It is also mentioned in The Minus 5 song John Barleycorn Must Live, provides a brief history of the marshes of San Pablo Bay
3.
Richmond, California
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Richmond is a city in western Contra Costa County, California, United States. The city was incorporated on August 7,1905, under the McLaughlin Administration, Richmond was the largest city in the United States served by a Green Party mayor. As of the 2010 U. S. Census, the population is at 103,710. The largest, Richmond, Virginia, is the namesake of the California city, the Ohlone Indians were the first inhabitants of the Richmond area, settling an estimated 5,000 years ago. The name Richmond appears to predate actual incorporation by more than fifty years, the Atchison, Topeka and Santa Fe Railroad had its terminus at Richmond. The first post office opened in 1900, Richmond was founded and incorporated in 1905, carved out of Rancho San Pablo, from which the nearby town of San Pablo inherited its name. Until the enactment of prohibition in 1919, the city had the largest winery in the world, in the 1920s the Ku Klux Klan was active in the city. In 1930 the Ford Motor Company opened a plant called Richmond Assembly Plant which moved to Milpitas in the 1960s. The old Ford plant has been a National Historic Place since 1988, the city was a small town at that time, until the onset of World War II which brought on a rush of migrants and a boom in the industrial sector. Standard Oil set up here in 1901, including a what is now the Chevron Richmond Refinery and tank farm. There is a pier into San Francisco Bay south of Point Molate for oil tankers, the western terminus of the Santa Fe Railroad was established in Richmond with ferry connections at Ferry Point in the Brickyard Cove area of Point Richmond to San Francisco. Many of these lived in specially constructed houses scattered throughout the San Francisco Bay Area, including Richmond, Berkeley. A specially built rail line, the Shipyard Railway, transported workers to the shipyards, kaisers Richmond shipyards built 747 Victory and Liberty ships for the war effort, more than any other site in the U. S. The city broke many records and even built one Liberty ship in a five days. On average the yards could build a ship in thirty days, the medical system established for the shipyard workers at the Richmond Field Hospital eventually became todays Kaiser Permanente HMO. It remained in operation until 1993 when it was replaced by the modern Richmond Medical Center hospital, Point Richmond was originally the commercial hub of the city, but a new downtown arose in the center of the city. It was populated by many department stores such as Kress, J. C. Penney, Sears, Macys, during the war the population increased dramatically and peaked at around 120,000 by the end of the war. Once the war ended the workers were no longer needed
4.
Point San Pablo Yacht Harbor
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Point San Pablo Yacht Harbor is an isolated marina and small community at the far end of Point San Pablo in San Pablo Bay, within Richmond, in Contra Costa County, California. The village is home to a few individuals living in hundreds of boats. The area also features the Point San Pablo Marina and Yacht Club, the village is also the starting point for visitors to East Brother Light Station a historic landmark. The hills surrounding the town are completely undeveloped and feature chaparral landscaping, the area is near the Chevron Richmond Refinery and some tank farm containers are visible in addition to the Richmond Landfill across the waters of Castro Cove, a contaminated estuarine habitat. Point San Pablo Beach is also located here, the village has panoramic views of the undeveloped coastlines of southern Napa, Sonoma, and Solano counties and eastern central Marin County. The hills surrounding the village are completely undeveloped and feature Eucalyptus trees, the isolation of the area and undeveloped lands make deer sightings commonplace. Other animals in the include the endangered salt marsh harvest mouse. The areas around the marina and breakwaters have many egrets, herons, the Point San Pablo Yacht Harbor is privately owned. Both the San Pablo Sportsmens Club and the Point San Pablo Preservation Society are non-profit organizations located at the harbor, the societys goal is to preserve the harbor and surrounding lands and waterways for public use and enjoyment. San Pablo Peninsula San Pablo Bay topics Point San Pablo Yacht Harbor website Google maps aerial view
5.
Wildcat Creek (California)
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In 1772, the first recorded Spanish expedition crossed Wildcat Creek, although the Spaniards may have traveled this far north as early as 1769. The 1772 Fages and 1776 de Anza expeditions received festive greetings at two villages along Wildcat Creek, one of which was estimated at 100 –200 people in size. Within three decades, nearly all the native Huchiun had been forced to move to Mission Dolores, on an 1830 diseño of the Rancho San Pablo Wildcat Creek appears as Arroyo Seco. Later it was known as Arroyo Chiquito. An 1861 map indicates that Wildcat Creek was called Little San Pablo Creek then, big San Pablo Creek is located in the next drainage east of the drainage of Wildcat Creek. There are over fifty geographic place names in California with the word wildcat, the Wildcat Creek watershed drains 11.1 square miles. The creek originates on Vollmer Peak in Tilden Regional Park just east of the city of Berkeley and it feeds the artificial Lake Anza as well as the smaller reservoir Jewel Lake along its course. In its lower course, it passes through the city of San Pablo, where it exits the hills, it passes through Alvarado Park, which includes a WPA-constructed stone arch bridge over the creek. It also courses through San Pablos civic center and Davis Park, Wildcat Creek culminates in the 387 acre Wildcat Marsh and thence to San Pablo Bay. The Wildcat San Pablo Creeks Watershed Council won the Governors Environmental, founded in 1985, it is the oldest, continuing running urban watershed council in California. In 2004, the Wildcat San Pablo Watershed Council began work on the Wildcat Creek Watershed Restoration Plan, in April,2010, the plan was published and addressed three goals,1. Reduce flood risk based on Wildcat Creek’s 100-year flood flows and improve stormwater management in low-lying neighborhoods, enhance riparian habitat, specifically focused on stream resident coastal rainbow trout and the potential restoration of anadromous steelhead migration. Develop recreational resources for the community, specifically a fully connected two-mile Wildcat Creek Trail through the City, in September 2010 the City of San Pablo announced that it had received a $1.8 million grant from the state Department of Water Resources to clean up Wildcat Creek. Wildcat Creek supported a steelhead run historically, but degradation of habitat, the dams that form both of these artificial lakes Lake Anza and Jewel Lake are impassable barriers to spawning steelhead. In September 1983, the East Bay Regional Park District planted 615 steelhead from Redwood Creek into Wildcat Creek between Alvarado Park and the University of California Botanic Gardens at Berkeley and this re-introduction has been successful with steelhead reproducing in the creek below Jewel Lake. According to CEMAR’s San Francisco Estuary Watersheds Evaluation of 2007, only 5.1 miles of the watershed’s total 22.22 miles of channel is suitable and available to steelhead. The fish have also spotted in Tilden Regional Park in the Berkeley Hills near the parks merry-go-round. A second native fish, the three-spined stickleback thrives in the creek and its tributaries
6.
Castro Creek
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Castro Creek is a creek in Richmond, California in the western part of the city adjacent to the Chevron Oil Refinery. Wildcat Creek drains into it directly and though other Wildcat Marsh tributaries into Castro Cove of San Pablo Bay, the creek drains from the drainage basin of the surrounding area and was once part of the channel that separated the island of Point Richmond with the mainland. The stream is waterway is named after Don Víctor Castro the owner of the area when it was Rancho San Pablo, the Chevron Richmond Refinery dumps wastewater into the creek routinely 500 yards north of the confluence with Wildcat Creek and also in a drainage. Other waste may only be dumped into the creek through a ditch on Castro Street during high intensity rainfall. Castro Creek is a fishing, shell-fishing, and recreation area and its estuarine habitat is essential habitat for several endangered species. The creek is also a spawning and migration center. Castro Cove has become polluted from 85 years of unbridled discharge of waste waters with PAHs. Castro Cove Cerrito Creek - marked the border of Castros ranch List of watercourses in the San Francisco Bay Area
7.
Cove
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A cove is a small type of bay or coastal inlet. Coves usually have narrow, restricted entrances, are circular or oval. Small, narrow, sheltered bays, inlets, creeks, or recesses in a coast are often considered coves, colloquially, the term can be used to describe a sheltered bay. Geomorphology describes coves as precipitously-walled and rounded cirque-like openings as in a valley extending into or down a mountainside, coves are formed by differential erosion, which occurs when softer rocks are worn away faster than the harder rocks surrounding them. These rocks further erode to form a bay with a narrow entrance. A notable example is Lulworth Cove on the Jurassic Coast in Dorset, to its west, a second cove, Stair Hole, is forming. Clark, John O. E. Stiegler, Stella, the Facts on File, Dictionary of Earth Science. New York, Market House Books Ltd
8.
Mudflat
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Mudflats or mud flats, also known as tidal flats, are coastal wetlands that form when mud is deposited by tides or rivers. They are found in sheltered areas such as bays, bayous, lagoons, mudflats may be viewed geologically as exposed layers of bay mud, resulting from deposition of estuarine silts, clays and marine animal detritus. Most of the sediment within a mudflat is within the intertidal zone, in the past tidal flats were considered unhealthy, economically unimportant areas and were often dredged and developed into agricultural land. Several especially shallow mudflat areas, such as the Wadden Sea, are now popular among those practising the sport of mudflat hiking. On the Baltic Sea coast of Germany in places, mudflats are exposed not by tidal action and these wind-affected mudflats are called windwatts in German. Tidal flats, along with salt marshes and mangrove forests, are important ecosystems. They are often of importance to migratory birds, as well as certain species of crabs, mollusks. In the United Kingdom mudflats have been classified as a Biodiversity Action Plan priority habitat, the maintenance of mudflats is important in preventing coastal erosion. However, mudflats worldwide are under threat from predicted sea level rises, land claims for development, dredging due to shipping purposes, in some parts of the world, such as East and South-East Asia, mudflats have been reclaimed for aquaculture, agriculture, and industrial development. For example, around the Yellow Sea region of East Asia, mudflat sediment deposits are focused into the intertidal zone which is composed of a barren zone, marsh and salt pan. Within these areas are various ratios of sand and mud that make up the sedimentary layers, the associated growth of coastal sediment deposits can be attributed to rates of subsidence along with rates of deposition and changes in sea level. Barren zones extend from the lowest portion of the zone to the marsh areas. Beginning in close proximity to the bars, sand dominated layers are prominent. Common bedding types include laminated sand, ripple bedding, and bay mud, bioturbation also has a strong presence in barren zones. Marshes contain an abundance of plants while the sediment layers consist of thin sand. Mudcracks are a common as well as wavy bedding planes, marshes are also the origins of coal/peat layers because of the abundant decaying plant life. Salt pans can be distinguished in that they contain thinly laminated layers of clayey silt, the main source of the silt comes from rivers. Dried up mud along with wind erosion forms silt dunes, when flooding, rain or tides come in, the dried sediment is then re-distributed
9.
Bay mud
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Bay mud manifests low shear strength, high compressibility and low permeability, making it hazardous to build upon in seismically active regions like the San Francisco Bay Area. Typical bulk density of bay mud is approximately 1.3 grams per cubic centimetre, Bay mud has its own official geological abbreviation. The designation for Quaternary older bay mud is Qobm and the acronym for Quaternary younger bay mud is Qybm, an alluvial layer is often found overlying the older bay mud. In relation to shipping channels, it is necessary to dredge bay bottoms. It is not uncommon to dredge the same channel repeatedly since further settling sediments are prone to redeposit on an open valley floor. Bay muds originate from two generalized sources, first alluvial deposits of clays, silts and sand occur from streams tributary to a given bay. The extent of these unconsolidated interglacial deposits typically ranges throughout a given bay to the extent of the historical perimeter marshlands, second, in periods of high glaciation, deposits of silts, sands and organic plus inorganic detritus may form a separate distinct layer. Thus bay muds are important time records of activity and streamflow throughout the Quaternary period. Some depositional formation is quite recent, such as in the case of Florida Bay, where much of the bay mud has accumulated since 2000 BC, and consists of primarily decayed organic material. In the case of the Bristol Channel in the United Kingdom bay, mud formation has been occurring at least since the Eemian Stage, in other cases such as with San Francisco Bay, deposition has been interrupted by sea-level changes, and strata of vastly different vintages are found. In the San Francisco Bay Area, these are called Young bay mud, human activities can also affect deposition, close to half of the Young Bay Mud in San Francisco Bay was placed in the period 1855–1865, as a result of placer mining in the Sierra Nevada foothills. Construction on bay mud sites is difficult because of the low strength. A number of buildings have been constructed over bay muds, typically employing special mitigation designs to withstand seismic risks. Complicating design issues, fill is sometimes deposited on the surface level. For example, the Dakin Building in Brisbane, California was designed in 1985 to sit on piles 150 feet deep, anchoring to the Franciscan formation, below the bay muds and through an upper fill layer. Furthermore, the entrance ramp has been set on a giant hinge to allow the surrounding land to settle, while the building absolute height remains constant. The Crowne Plaza high-rise hotel in Burlingame, California was also designed to sit over bay muds, as was the Westin Hotel in Millbrae, California, indeed, Bostons entire Back Bay district is named for the tidal bay that it now covers. Logan International Airport and the San Francisco International Airport are also constructed over bay mud, when the mud layer is exposed at the tidal fringe, mudflats result affording a unique ecotone that affords numerous shorebird species a safe feeding and resting habitat
10.
Salt marsh
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It is dominated by dense stands of salt-tolerant plants such as herbs, grasses, or low shrubs. These plants are terrestrial in origin and are essential to the stability of the marsh in trapping and binding sediments. Salt marshes play a role in the aquatic food web. They also support terrestrial animals and provide coastal protection, salt marshes occur on low-energy shorelines in temperate and high-latitudes which can be stable or emerging, or submerging if the sedimentation rate exceeds the subsidence rate. Commonly these shorelines consist of mud or sand flats which are nourished with sediment from inflowing rivers and these typically include sheltered environments such as embankments, estuaries and the leeward side of barrier islands and spits. In the tropics and sub-tropics they are replaced by mangroves, an area that differs from a marsh in that instead of herbaceous plants. Most salt marshes have a low topography with low elevations but a vast wide area, salt marshes are located among different landforms based on their physical and geomorphological settings. Such marsh landforms include deltaic marshes, estuarine, back-barrier, open coast, embayments, deltaic marshes are associated with large rivers where many occur in Southern Europe such as the Camargue, France in the Rhone delta or the Ebro delta in Spain. They are also extensive within the rivers of the Mississippi Delta in the United States, in New Zealand, most salt marshes occur at the head of estuaries in areas where there is little wave action and high sedimentation. Such marshes are located in Awhitu Regional Park in Auckland, the Manawatu Estuary, back-barrier marshes are sensitive to the reshaping of barriers in the landward side of which they have been formed. They are common along much of the eastern coast of the United States, large, shallow coastal embayments can hold salt marshes with examples including Morecambe Bay and Portsmouth in Britain and the Bay of Fundy in North America. They have a big impact on the biodiversity of the area, salt marsh ecology involves complex food webs which include primary producers, primary consumers, and secondary consumers. The low physical energy and high grasses provide a refuge for animals, many marine fish use salt marshes as nursery grounds for their young before they move to open waters. Saltmarshes across 99 countries were mapped by Mcowen et al, a total of 5,495,089 hectares of mapped saltmarsh across 43 countries and territories are represented in a Geographic Information Systems polygon shapefile. This estimate is at the low end of previous estimates. Mats of filamentous blue-green algae can fix silt and clay sized sediment particles to their sticky sheaths on contact which can increase the erosion resistance of the sediments. This assists the process of sediment accretion to allow colonising species to grow, as a result, competitive species that prefer higher elevations relative to sea level can inhabit the area and often a succession of plant communities develops. Coastal salt marshes can be distinguished from terrestrial habitats by the tidal flow that occurs
