IMHE OpenIR  > Journal of Mountain Science  > Journal of Mountain Science-2015  > Vol12 No.6
Spatial Variability and Cartography of Maximum Annual Daily Rainfall under Different Return Periods in Northern Algeria
MEDDI Mohamed; TOUMI Samir
Corresponding AuthorMEDDI Mohamed
2015-11
Source PublicationJournal of Mountain Science
ISSN1672-6316
Volume12Issue:6Pages:1403-1421
Subtype期刊论文
AbstractThe estimation of precipitation quantileshas always been an area of great importance to meteorologists, hydrologists, planners and managers of hydrotechnical infrastructures. In many cases, it is necessary to estimate the values relating to extreme events for the sites where there is little or no measurement, as well as their return periods. A statistical approach is the most used in such cases. It aims to find the probability distribution that best fitsthe maximum daily rainfall values. In our study, 231 rainfall stations were used to regionalize and find the best distribution for modeling the maximum daily rainfall in Northern Algeria. The L-moments method was used to perform a regionalization based on discordance criteria and homogeneity test. It gave rise to twelve homogeneous regions in terms of L-Coefficient of variation(L-CV), L-Skewness (L-CS)and L-Kurtosis (L-CK). This same technique allowed us to select the regional probability distribution for each group using the Z statistic. The generalized extreme values distribution (GEV) was selected to model the maximum daily rainfall of 10 groups located in the north of the steppe region and the generalized logistic distribution (GLO) for groups representing the steppes of Central and Western Algeria. The study of uncertainty by the bias and RMSE showed that the regional approach is acceptable. We have also developed maximum daily rainfall maps for 2, 5, 10, 20, 50 and 100 years return periods. We relied on a network of 255 rainfall stations. The spatial variability of quantiles was evaluated by semi-variograms. All rainfallfrequencymodelshave a spatial dependence with an exponential model adjusted to the experimental semi-variograms. The parameters of the fitted semi-variogram for different return periods are similar,throughout, while the nugget is more important for high return periods. Maximum daily rainfall increases from South to North and from West to East, andis more significant in the coastal areas of eastern Algeria where it exceeds 170 mm for a return period of 100 years. However,it does not exceed 50 mm in the highlands of the west.
KeywordAnnual Maximum Daily Rainfall Regionalisation L-moments Mapping Northernalgeria
DOI10.1007/s11629-014-3084-3.
Indexed BySCI
Language英语
Citation statistics
Document Type期刊论文
Identifierhttp://ir.imde.ac.cn/handle/131551/11044
CollectionJournal of Mountain Science_Journal of Mountain Science-2015_Vol12 No.6
Recommended Citation
GB/T 7714
MEDDI Mohamed,TOUMI Samir. Spatial Variability and Cartography of Maximum Annual Daily Rainfall under Different Return Periods in Northern Algeria[J]. Journal of Mountain Science,2015,12(6):1403-1421.
APA MEDDI Mohamed,&TOUMI Samir.(2015).Spatial Variability and Cartography of Maximum Annual Daily Rainfall under Different Return Periods in Northern Algeria.Journal of Mountain Science,12(6),1403-1421.
MLA MEDDI Mohamed,et al."Spatial Variability and Cartography of Maximum Annual Daily Rainfall under Different Return Periods in Northern Algeria".Journal of Mountain Science 12.6(2015):1403-1421.
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