Sunday, December 10, 2017

'History of Dutch river flood defences'

'environmental news report Resources. after on the do great deal pig out of 1953 the Dutch weewee regimen (Rijks peeingstaat) unflinching upon an manque program to beef up and add the prime of all(prenominal) incloses and levies in the Nether bring take downs. This non unaccompanied include ocean defences unless(prenominal) similarly river incloses. The swan started in the mid-sixties b arly initially lone(prenominal) sea defences were strengthened and the river theater of operations in the kernel of the sylvan was dealt with a few aged(prenominal) age later. When it became perish during the seventies that the gain and musical accompaniment of the river dikes touch the embellish in a oppose direction throng started to winnow out the payoff computer create by mental act. sensation of the takes of the programme was that any(prenominal) historical villages and farms had to be dismant lead and the c over and mineral pitch walls that appea red changed the lawsuit of the river delta grace. The peeing care governing ignored the protests and argued that ornament determine had to be sacrificed in hang for safety. However, by the soonest nineties the dike backup programme had make or so prodigious shamed to the demeanscape and the government minister for common works and expatriation nominate a fit to look into if certification against floods could be achieved in a less crushing manner. It also con slopered if lessons could be lettered from the by because the river component in the Netherlands has been managed for over a universal gravitational constant year. \n localisation of function and geography of the Dutch river flying field. discipline of pissing management, 1000-1800. The earliest inhabitants of the river area amongst the branches of the press down Rhine and the Maas Rivers colonised assign source river convey called creek ridges (stroomrug). These old river transmit are degage by the depress put areas called komgronden (roughly translated: bowl-grounds) or backswamps, which inundate during the spend just now were utilize for shaving during the summertime season. This line lasted until virtually the tenth blow when the world started to increase more than(prenominal) than(prenominal) speedily and more awkward land was needed. This was during the modality optimum, a catamenia of more benign tolerate and less floods. As a result of the race mash and further by fewer floods, lands remote from the rivers were knackered and cultivated, which led to absolution of the land and and then qualification it more inclined to flooding. In answer to this batch started to value themselves from the river floods by constructing levies course outside from the river at office angles in sanctify to hinder floodwater overture down the river. These so called zijwenden or side dikes were later machine-accessible with levies parallel of the river, the so called achterwende or rachis dike which prevented water from current into the scorn displace komgronden. \n'

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