A beach is a landform alongside a body of water which consists of loose particles. The particles composing a beach are typically made from rock, such as sand, gravel, shingle, pebbles, etc., or biological sources, such as mollusc shells or coralline algae. Sediments settle in different densities and structures, depending on the local wave action and weather, creating different textures, colors and gradients or layers of material.
The Brisbane River is the longest river in South East Queensland, Australia, and flows through the city of Brisbane, before emptying into Moreton Bay on the Coral Sea. John Oxley, the first European to explore the river, named it after the Governor of New South Wales, Sir Thomas Brisbane in 1823. The penal colony of Moreton Bay later adopted the same name, eventually becoming the present city of Brisbane. The river is a tidal estuary and the water is brackish from its mouth through the majority of the Brisbane metropolitan area westward to the Mount Crosby Weir. The river is wide and navigable throughout the Brisbane metropolitan area.
A river delta is a landform shaped like a triangle, created by the deposition of sediment that is carried by a river and enters slower-moving or stagnant water. This occurs at a river mouth, when it enters an ocean, sea, estuary, lake, reservoir, or another river that cannot carry away the supplied sediment. It is so named because its triangle shape resembles the uppercase Greek letter delta, Δ. The size and shape of a delta are controlled by the balance between watershed processes that supply sediment, and receiving basin processes that redistribute, sequester, and export that sediment. The size, geometry, and location of the receiving basin also plays an important role in delta evolution.
Southern Leyte, officially the Province of Southern Leyte, is a province in the Philippines located in the Eastern Visayas region. Its capital and largest city is Maasin. Southern Leyte comprised the third congressional district Leyte until it was made into an independent province in 1959. Southern Leyte includes Limasawa, an island to the south where the first Roman Catholic Mass in Philippine soil is believed to have taken place and thus considered to be the birthplace of Roman Catholicism in the Philippines.
Mudflats or mud flats, also known as tidal flats or, in Ireland, slob or slobs, are coastal wetlands that form in intertidal areas where sediments have been deposited by tides or rivers. A global analysis published in 2019 suggested that tidal flat ecosystems are as extensive globally as mangroves, covering at least 127,921 km2 (49,391 sq mi) of the Earth's surface. They are found in sheltered areas such as bays, bayous, lagoons, and estuaries; they are also seen in freshwater lakes and salty lakes alike, wherein many rivers and creeks end. Mudflats may be viewed geologically as exposed layers of bay mud, resulting from deposition of estuarine silts, clays and aquatic animal detritus. Most of the sediment within a mudflat is within the intertidal zone, and thus the flat is submerged and exposed approximately twice daily.
Coos Bay is an estuary where the Coos River enters the Pacific Ocean, the estuary is approximately 12 miles long and up to two miles wide. It is the largest estuary completely within Oregon state lines. The Coos Bay watershed covers an area of about 600 square miles and is located in northern Coos County, Oregon, in the United States. The Coos River, which begins in the Oregon Coast Range, enters the bay from the east. From Coos River, the bay forms a sharp loop northward before arching back to the south and out to the Pacific Ocean. Haynes Inlet enters the top of this loop. South Slough branches off from the bay directly before its entrance into the Pacific Ocean. The bay was formed when sea levels rose over 20,000 years ago at the end of the Last Glacial Maximum, flooding the mouth of the Coos River. Coos Bay is Oregon's most important coastal industrial center and international shipping port, with close ties to San Francisco, the Columbia River, Puget Sound and other major ports of the Pacific rim.
Libagon, officially the Municipality of Libagon, is a 5th class municipality in the province of Southern Leyte, Philippines. According to the 2020 census, it has a population of 15,244 people.
Sogod, officially the Municipality of Sogod, is a 2nd class municipality in the province of Southern Leyte, Philippines. According to the 2020 census, it has a population of 47,552 people.
The Colorado River Delta is the region where the Colorado River once flowed into the Gulf of California in eastern Mexicali Municipality in the north of the state of Baja California, in northwestern Mexico. The delta is part of a larger geologic region called the Salton Trough. Historically, the interaction of the river's flow and the ocean's tide created a dynamic environment, supporting freshwater, brackish, and saltwater species. Within the delta region, the river split into multiple braided channels and formed a complex estuary and terrestrial ecosystems. The use of water upstream and the accompanying reduction of freshwater flow has resulted in the loss of most of the wetlands of the area, as well as drastic changes to the aquatic ecosystems - an ecosystem collapse.
River engineering is a discipline of civil engineering which studies human intervention in the course, characteristics, or flow of a river with the intention of producing some defined benefit. People have intervened in the natural course and behaviour of rivers since before recorded history—to manage the water resources, to protect against flooding, or to make passage along or across rivers easier. Since the Yuan Dynasty and Ancient Roman times, rivers have been used as a source of hydropower. From the late 20th century, the practice of river engineering has responded to environmental concerns broader than immediate human benefit. Some river engineering projects have focused exclusively on the restoration or protection of natural characteristics and habitats.
The crystal darter is a species of freshwater ray-finned fish, a darter from the subfamily Etheostomatinae, part of the family Percidae, which also contains the perches, ruffes and pikeperches. This small North American fish is found in small, moderate, and swift rivers in the drainage basins of the Mississippi and Ohio Rivers. It is now extirpated from a majority of its range along the Ohio River.
Quarry Lakes Regional Recreation Area is a regional park located in Fremont, California that is part of the East Bay Regional Parks system. Before being converted into a park, the site was used as a gravel quarry. When water purchased by the public for groundwater recharge of the Niles Cone flooded the gravel pits, the gravel harvesters began to daily pump the seeping water down Alameda Creek into San Francisco Bay. The Alameda County Water District acquired the quarry after the pumping was declared to be an illegal waste in 1976.
The Nagashima Dam is a dam on the Ōi River, located in Kawanehon Town, Haibara District, Shizuoka Prefecture on the island of Honshū, Japan.
Cape Town lies at the south-western corner of the continent of Africa. It is bounded to the south and west by the Atlantic Ocean, and to the north and east by various other municipalities in the Western Cape province of South Africa.
Sogod Bay is a large bay in the southern part of Leyte Island in the Philippines. An extension of the Bohol Sea, the bay is surrounded by the province of Southern Leyte, and the namesake municipality of Sogod is located at the head of the bay. Panaon Island forms part of the eastern side of Sogod Bay, while Sarangani or Limasawa Island is at the mouth of the bay.
Eastern Visayas is an administrative region in the Philippines, designated as Region VIII. It consists of three main islands: Samar, Leyte, and Biliran. The region has six provinces: Biliran, Leyte, Northern Samar, Samar, Eastern Samar, Southern Leyte, one independent city, Ormoc, and one highly urbanized city, Tacloban. The highly urbanized city of Tacloban is the sole regional center. These provinces and cities occupy the easternmost islands of the Visayas group of islands, hence the region's name. Some historians believe that the oldest ancient kingdom in the Philippines is found in this region, the Lakanate of Lawan, which plays a significant role in the Polynesian and Austronesian intermigration.
Climate change in Virginia encompasses the effects of climate change, attributed to man-made increases in atmospheric carbon dioxide, in the U.S. state of Virginia.
The Helderberg Marine Protected Area is a small marine conservation area on the north-eastern side of False Bay in the Western Cape province of South Africa, It lies between the mouths of the Lourens River in the Strand, and the Eerste River in Macassar.
Gronda lagunare is a term used to indicate the area of the Lagoon of Venice by its mainland shore. The term is derived from the fact that it receives the waters from the rivers and streams which flow into the lagoon from the drainage basin of the plain of the mainland by the lagoon. It is also reached by the tidal flows form he sea., it is meant to be a belt that forms a transition area between the open lagoon and the mainland.
Te Matuku Marine Reserve is a marine reserve administered by the New Zealand Department of Conservation. It includes Te Matuku Bay, one of the largest and least disturbed estuaries on Waiheke Island, as well as a surrounding area of sea. It covers an area of 690 ha and was established in 2003.
