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- W30395765 abstract "After Katrina flooded New Orleans, California was identified as the next area where such a major disaster could happen. Situated between the Sierra Nevada and coastal mountain ranges Californias Central Valley is characterized by its flatness and dominated by agriculture as well as large cities as Sacramento. The Sacramento River and San Joaquin River originate in the Sierra Nevada and gather in the Sacramento-San Joaquin Delta which is mainly situated below sea level. Floods have threatened the area already for a long time, mainly through storm surges from the San Francisco Bay, river runoff from the Sierra Nevada and earthquakes. Not only the Central Valley and the Delta are endangered, also the fresh water supply for 33 million people is at stake, while water is transported from north to south through the Delta. In this thesis the Dutch water defense system and the system in California as well as sometimes the whole US are compared. The flat areas below sea level and similar recent floods (1993/1995 river floods in the Netherlands and 1997 river floods in California) make exchange of knowledge worthwhile, while the damage that earthquakes could cause is something not well known in the Netherlands. A more detailed comparison is made of levee evaluation methods. The Netherlands has already a long history of levee evaluation with special evaluation documents, while in the US, where the levee knowledge is mainly based on dams, current investigations in the New Orleans area and California stimulate the thinking on how to evaluate levees. Probably the most interesting difference between the current US and Dutch levee evaluation practice is how levee underseepage or piping is evaluated. Comparison of the Mississippi cases where the US criterion is based on cases from the 1940s and 1950s and the Dutch criteria result in some interesting results and even more questions. Both the Dutch as well as the US criteria are not always satisfying and the model restrictions, which are not always clear, make their applicability sometimes questionable. More exchange of knowledge between the Dutch and US levee specialists could be useful for both the American levees as the Dutch levees! Cooperation between the two countries should be stimulated and welcomed." @default.
- W30395765 created "2016-06-24" @default.
- W30395765 creator A5021152137 @default.
- W30395765 date "2007-08-30" @default.
- W30395765 modified "2023-09-23" @default.
- W30395765 title "Levees and levee evaluation, the Dutch and US practice compared" @default.
- W30395765 hasPublicationYear "2007" @default.
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