PUB in practice: case studies - Runoff Prediction in Ungauged Basins: Synthesis across Processes, Places and Scales - page 302

Table 11.6. Minimum, average standard deviation and maximum values of the geomorphological and climatic indices
(or catchment descriptors) for 51 unregulated basins in the study region

Index A A P H max H med H min L T A P A E PA P NA

km 2

C

units % m m m km mm/yr mm/yr mm/yr

Minimum 31.6 0.1 279 178 3 10 8.3 824.2 581.7 13.9

Average 359.1 47.4 2078 938 351 37 11.6 1090.5 691.6 398.8

Std. Dev. 520.8 30.2 644 380 285 29 1.4 167.4 49.6 185.0

Maximum 3082.0 99.0 2914 1950 1103 160 15.3 1505.4 826.0 923.7

5

4

3

2

1

0

-1

-2

-3

A A P H max H med H min

L

T A P A E PA P NA

Figure 11.34. Variability of normalised catchment descriptors for the
study region.

evaporation E pA , and mean annual net precipitation P NA ¼
P A − E pA .

The significant variability of the geomorphological and
climatic indices of interest for the 51 basins in the study area
is well represented in Table 11.6 and Figure 11.34 and corres-
ponds to a high hydrological complexity of the study region.

Method
Castellarin et al. (2004a) reviewed a number of regionalisa-
tion approaches proposed in the literature. The authors then
performed a comparison of three different regionalisation
approaches for the wide Italian region, as illustrated in
Figure 11.32 . The three regionalisation approaches were
selected as prototypes of the various classes of methods
proposed in the literature (see Section 7.3 for details) and,
even though they are often characterised by different names,
their practical implementation shows a similar degree of
complexity.
Three methods were compared: a parameter regression
method, named the

Figure 11.33. Characteristics of river basins in the study area (see also
Figure 11.32 ): (a) northern region (courtesy of Fanoinforma.it © and
Massimiliano Girolami, TDMitalia); (b) northern-central region (courtesy
of Fabrizio Sulli ©, http://abruzzomolisenatura.forumfree.it/ ) ; (c) central
region; (d) large river basins (courtesy of www.viaggioinabruzzo.it ©);
(e) southern region (published by Pescasseroli Wonderland
http://pescasseroli.p2pforum.it/ under CC Creative Commons license).

' statistical approach ' (adapted from the