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Head Of Tide
Head of tide, tidal limit or tidehead is the furthest point upstream where a river is affected by tidal fluctuations, or where the fluctuations are less than a certain amount. The river section influenced by tides and marine forces, but without salinity is a tidal river. Downstream areas are brackish and termed estuaries. Although this point may vary due to storms, spring tides, and seasonal or annual differences in water flows, there is generally an average point that is accepted as the head of tide (in Great Britain this is the Normal Tidal Limit, typically noted on Ordnance Survey maps as 'NTL'). The head of tide is important in surveying, navigation, and fisheries management, and thus many jurisdictions establish a legal head of tide. As the head of tide is useful for navigation, separate maps can be made of the tidal zones up to the head of tide, such as was done in New Jersey. [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] [Amazon] |
Cromwell Weir - Nottinghamshire (Geograph 2561867 By Jonathan Thacker)
Oliver Cromwell (25 April 15993 September 1658) was an English statesman, politician and soldier, widely regarded as one of the most important figures in British Isles, British history. He came to prominence during the Wars of the Three Kingdoms, initially as a senior commander in the Roundhead, Parliamentarian army and latterly as a politician. A leading advocate of execution of Charles I, the execution of Charles I of England, Charles I in January 1649, which led to the establishment of the Commonwealth of England, Cromwell ruled as Lord Protector from December 1653 until his death. Although elected Member of Parliament (United Kingdom), Member of Parliament (MP) for Huntingdon (UK Parliament constituency), Huntingdon in 3rd Parliament of Charles I, 1628, much of Cromwell's life prior to 1640 was marked by financial and personal failure. He briefly contemplated emigration to New England, but became a religious Independent (religion), Independent in the 1630s and thereafter be ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] [Amazon] |
