995 resultados para United States. Federal Extension Service.


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Editor-in-chief: 1952- C.H. Goddard; 1955-65, J.B. Coates; 1965-66, A.L. Ahnfeldt; 1966-69, R.S. Anderson; 1970- W.S. Mullins.

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Mode of access: Internet.

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Fiscal year ends June 30.

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Mode of access: Internet.

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United States federal agencies assess flood risk using Bulletin 17B procedures which assume annual maximum flood series are stationary. This represents a significant limitation of current flood frequency models as the flood distribution is thereby assumed to be unaffected by trends or periodicity of atmospheric/climatic variables and/or anthropogenic activities. The validity of this assumption is at the core of this thesis, which aims to improve understanding of the forms and potential causes of non-stationarity in flood series for moderately impaired watersheds in the Upper Midwest and Northeastern US. Prior studies investigated non-stationarity in flood series for unimpaired watersheds; however, as the majority of streams are located in areas of increasing human activity, relative and coupled impacts of natural and anthropogenic factors need to be considered such that non-stationary flood frequency models can be developed for flood risk forecasting over relevant planning horizons for large scale water resources planning and management.

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"A Consumer publication from the General Services Administration."

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"A Consumer publication from the General Services Administration."