The Rhine is one of the major European rivers. The river begins in the Swiss canton of Graubünden in the southeastern Swiss Alps, forms part of the Swiss-Liechtenstein, Swiss-Austrian, Swiss-German and then the Franco-German border, then flows in a mostly northerly direction through the German Rhineland and the Netherlands and eventually empties into the North Sea.
Flevoland is the 12th and youngest province of the Netherlands, established in 1986, when the Southern and Eastern Flevopolders, together with the Noordoostpolder were merged into one provincial entity. It is in the centre of the country in the former Zuiderzee, which was turned into the freshwater IJsselmeer by the closure of the Afsluitdijk in 1932. Almost all of the land belonging to Flevoland was reclaimed in the 1950s and 1960s while splitting the Markermeer and Bordering lakes from the IJsselmeer. As to dry land, it is the smallest province of the Netherlands at 1,412 km2 (545 sq mi), but not gross land as that includes much of the waters of the fresh water lakes (meres) mentioned. The province has a population of 423,021 as of January 2020 and consists of six municipalities. Its capital is Lelystad and its most populous city is Almere.
The Hudson River is a 315-mile (507 km) river that flows from north to south primarily through eastern New York in the United States. It originates in the Adirondack Mountains of Upstate New York and flows southward through the Hudson Valley to the Upper New York Bay between New York City and Jersey City, eventually draining into the Atlantic Ocean at New York Harbor. The river serves as a political boundary between the states of New Jersey and New York at its southern end. Farther north, it marks local boundaries between several New York counties. The lower half of the river is a tidal estuary, deeper than the body of water into which it flows, occupying the Hudson Fjord, an inlet which formed during the most recent period of North American glaciation, estimated at 26,000 to 13,300 years ago. Even as far north as the city of Troy, the flow of the river changes direction with the tides.
The IJsselmeer, also known as Lake IJssel in English, is a closed off inland bay in the central Netherlands bordering the provinces of Flevoland, North Holland and Friesland. It covers an area of 1,100 km2 (420 sq mi) with an average depth of 5.5 m (18 ft). The river IJssel flows into the IJsselmeer.
The Zuiderzee or Zuider Zee was a shallow bay of the North Sea in the northwest of the Netherlands, extending about 100 km inland and at most 50 km wide, with an overall depth of about 4 to 5 metres (13–16 feet) and a coastline of about 300 km. It covered 5,000 km2 (1,900 sq mi). Its name is Dutch for "southern sea", indicating that the name originates in Friesland, to the north of the Zuiderzee. In the 20th century the majority of the Zuiderzee was closed off from the North Sea by the construction of the Afsluitdijk, leaving the mouth of the inlet to become part of the Wadden Sea. The salt water inlet changed into a fresh water lake now called the IJsselmeer after the river that drains into it, and by means of drainage and polders, an area of some 1,500 km2 (580 sq mi) was reclaimed as land. This land eventually became the province of Flevoland, with a population of nearly 400,000 (2011).
The IJssel is a Dutch distributary of the river Rhine that flows northward and ultimately discharges into the IJsselmeer, a North Sea natural harbour. It more immediately flows into the east-south channel around the Flevopolder, Flevoland which is kept at 3 metres below sea level. This body of water is then pumped up into the IJsselmeer.
The Delta Works is a series of construction projects in the southwest of the Netherlands to protect a large area of land around the Rhine–Meuse–Scheldt delta from the sea. Constructed between 1954 and 1997, the works consist of dams, sluices, locks, dykes, levees, and storm surge barriers located in the provinces of South Holland and Zeeland.
The Gulf of St. Lawrence is the outlet of the North American Great Lakes via the St. Lawrence River into the Atlantic Ocean. The gulf is a semi-enclosed sea, covering an area of about 226,000 square kilometres (87,000 sq mi) and containing about 34,500 cubic kilometres (8,300 cu mi) of water, which results in an average depth of 152 metres (499 ft).
The Afsluitdijk is a major dam and causeway in the Netherlands. It was constructed between 1927 and 1932 and runs from Den Oever in North Holland province to the village of Zurich in Friesland province, over a length of 32 kilometres (20 mi) and a width of 90 metres (300 ft), at an initial height of 7.25 metres (23.8 ft) above sea level.
The River Orwell flows through the county of Suffolk in England. Above Ipswich, the river is known as the River Gipping, but its name changes to the Orwell at Stoke Bridge, where the river becomes tidal. It broadens into an estuary at Ipswich, where the Ipswich dock has operated since the 7th century, and then flows into the North Sea at Felixstowe, the UK's largest container port, after joining the River Stour at Shotley forming Harwich harbour.
The River Dane is a tributary of the River Weaver that originates in the Peak District area of England. The name of the river is probably from the Old Welsh dafn, meaning a "drop or trickle", implying a slow-moving river.
A river delta is a landform created by deposition of sediment that is carried by a river as the flow leaves its mouth and enters slower-moving or stagnant water. This occurs where a river enters an ocean, sea, estuary, lake, reservoir, or another river that cannot carry away the supplied sediment. The size and shape of a delta is 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. River deltas are important in human civilization, as they are major agricultural production centers and population centers. They can provide coastline defense and can impact drinking water supply. They are also ecologically important, with different species' assemblages depending on their landscape position.
The River Clwyd is a river in Wales that rises in the Clocaenog Forest 5 mi (8 km) northwest of Corwen. Its total length is 35 mi (56 km).
Flood control is an important issue for the Netherlands, as due to its low elevation, approximately two thirds of its area is vulnerable to flooding, while the country is densely populated. Natural sand dunes and constructed dikes, dams, and floodgates provide defense against storm surges from the sea. River dikes prevent flooding from water flowing into the country by the major rivers Rhine and Meuse, while a complicated system of drainage ditches, canals, and pumping stations keep the low-lying parts dry for habitation and agriculture. Water control boards are the independent local government bodies responsible for maintaining this system.
Lake Flevo was a lake in what is now the Netherlands, which existed in Roman times and the early Middle Ages. Some geographers believe that this lake was not really a single lake, rather a set of several lakes connected to each other.
Holmes's Bonfire was a raid on the Vlie estuary in the Netherlands, executed by the English Fleet during the Second Anglo-Dutch War on 19 and 20 August 1666 New Style. The attack, named after the commander of the landing force, Rear-Admiral Robert Holmes, was successful in destroying by fire a large merchant fleet of 140 ships. During the same action, the town of West-Terschelling was burnt down, which caused outrage in the Dutch Republic.
The Rhine–Meuse–Scheldt delta is a river delta in the Netherlands formed by the confluence of the Rhine, the Meuse and the Scheldt rivers. In some cases, the Scheldt delta is considered a separate delta to the Rhine-Meuse delta. The result is a multitude of islands, branches and branch names that may at first sight look bewildering, especially as a waterway that appears to be one continuous stream may change names as many as seven times, e.g. Rhine → Bijlands Kanaal → Pannerdens Kanaal → Nederrijn → Lek → Nieuwe Maas → Het Scheur → Nieuwe Waterweg. Since the Rhine contributes most of the water, the shorter term Rhine Delta is commonly used. However, this name is also used for the delta where the Alpine Rhine flows into Lake Constance, so it is clearer to call the larger one Rhine–Meuse delta, or even Rhine–Meuse–Scheldt delta, as the Scheldt ends in the same delta. By some calculations, the delta covers 25,347 km2 (9,787 sq mi), making it the largest in Europe.
The Tomaga River, an open mature wave dominated barrier estuary or perennial stream, is located in the South Coast region of New South Wales, Australia.
The Marneslenk (Dutch), or Marneslinke (Frisian), or Marne estuary, was a former estuary in western Friesland south of Harlingen, now reclaimed to be farmland. It formed around the year 300 AD, when rising sea levels also enlarged the Almere lake to the southwest, and formed the Middelzee to the east. The Marneslenk had its mouth on the Vlie and stretched southeasterly to the area of Tirns and then headed east to the Middelzee. Between 1100 and 1300 AD the watercourse was reclaimed and turned into fields by the construction of dykes. One such dyke is the Pingjumer Gulden Halsband. The Bedelaarsvaart (Bidlersfeart) and Harnzerfeartis are what remains of this watercourse nowadays.
