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Non-stationary approach to at-site flood frequency modelling. III. Flood analysis of Polish rivers

, : Non-stationary approach to at-site flood frequency modelling. III. Flood analysis of Polish rivers. Journal of Hydrology Amsterdam 248(1/4): 152-167

This paper, the last of a three-part paper, investigates into trends in annual maximum flows of Polish rivers using 39 flow series for a period of 70 years from 1921 to 1990. The gradients of trends in the mean and the standard deviation (SD) are estimated by the weighted least squares method and the best fitting linear model of trend is with the aid of the Akaike Information Criterion (AIC). It is shown that for every time series, a trend in the variance has a considerable effect on the trend estimators of the mean value. The analysis also includes seasonal peak flow series in order to obtain further insight into the detected non-stationarity of the peak flow series. Using the maximum likelihood method for parameter estimation and AIC for identification of an optimum model, the best fitting probability distribution and trend model are identified, following the methods discussed in part 1. Then, the 1% quantiles for the first and the last years of observation, denoted, respectively, as Q(1%)(1921) and Q(1%)(1990), are estimated and analysed. The influence of the distribution assumption on the values of estimators of time-dependent moments is demonstrated. In general, a decreasing tendency in both the mean and the SD of annual peak flow series is detected. This tendency is more pronounced on rivers with a high contribution of winter floods to the annual peak flow discharge series. Summer season peak flow series is found to be stationary.


DOI: 10.1016/s0022-1694(01)00399-7

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Faverdin, P.; Agabriel, J.; Bocquier, F.; Ingrand, S., 1997: Maximize roughage intake: animal and management factors. Knowledge of factors related to variation of intake capacity is necessary to choose among breeding practices and feeding strategies which are well adapted to a maximum forage intake together with suitable animal performance. The first part of this...

Shmilovich, L.A.; Poliak, A.I., 1970: Cessation of status epilepticus and serial seizures with amytal-caffeine. Zhurnal Nevropatologii i Psikhiatrii Imeni S.S. Korsakova 70(1): 125-127

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Hemous G., 1972: Restoration of the floor of the orbit. Journal Francais D'Oto Rhino Laryngologie: 937-938

Fontaine, R.; Kieny, R.; Suhler, A., 1962: Postoperative arterial emboli, outside of cardiovascular surgery (apropos of 6 cases). Annales de Chirurgie 16: 1527-1532

Hisserich, D.; Reuter, H., 1984: Limits of the mechanical stress of raw milk for induced lipolysis. Raw milk was stressed in a Couette device and after stressing, free fatty acids were determined by the BLM-PEDIA titrimetric method [DSA 44, 3250]. Stresses of 0-260 kW m-3 were applied for 15 min at temp. between 4 and 40 degrees C. At energy den...

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Butcher R.L.; Barley D.A.; Inskeep E.K., 1969: Local relationship between the ovary and uterus of rats and guinea pigs corpus luteum. Endocrinology 84(3): 476-481

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