 |
| Titel |
Precipitation variability within an urban monitoring network via microcanonical cascade generators |
| VerfasserIn |
P. Licznar, C. De Michele, W. Adamowski |
| Medientyp |
Artikel
|
| Sprache |
Englisch
|
| ISSN |
1027-5606
|
| Digitales Dokument |
URL |
| Erschienen |
In: Hydrology and Earth System Sciences ; 19, no. 1 ; Nr. 19, no. 1 (2015-01-26), S.485-506 |
| Datensatznummer |
250120605
|
| Publikation (Nr.) |
 copernicus.org/hess-19-485-2015.pdf |
|
|
|
|
|
| Zusammenfassung |
Understanding the variability of precipitation at small scales is
fundamental in urban hydrology. Here we consider the case study of Warsaw,
Poland, characterized by a precipitation-monitoring network of 25 gauges
and microcanonical cascade models as the instrument of investigation.
We address the following issues partially investigated in literature: (1) the
calibration of microcanonical cascade model generators in conditions of short time
series (i.e., 2.5–5 years), (2) the identification of the probability
distribution of breakdown coefficients (BDCs) through ranking criteria and (3) the
variability among the gauges of the monitoring network of the empirical
distribution of BDCs.
In particular, (1) we introduce an overlapping moving window algorithm to
determine the histogram of BDCs and compare it with the
classic non-overlapping moving window algorithm; (2) we compare the 2N–B
distribution, a mixed distribution composed of two normal (N) and
one beta (B), with the classic B distribution to represent the BDCs using the Akaike information criterion; and (3) we use the cluster
analysis to identify patterns of BDC histograms among
gauges and timescales.
The scarce representation of the BDCs at large timescales,
due to the short period of observation (~ 2.5 years), is solved
through the overlapping moving window algorithm. BDC histograms are
described by a 2N–B distribution. A clear evolution of this distribution is
observed, in all gauges, from 2N–B for small timescales, N–B for
intermediate timescales and B distribution for large timescales.
The performance of the microcanonical cascades is evaluated for the
considered gauges. Synthetic time series are analyzed with respect to the
intermittency and the variability of intensity and compared to observed
series. BDC histograms for each timescale are compared with the 25 gauges
in Warsaw and with other gauges located in Poland and Germany. |
| |
|
| Teil von |
|
|
|
|
|
|
|
|