Geology Reference
In-Depth Information
Fig. 5.3 Data series from the Brue catchment used for daily solar radiation
5.1.3 Details of River Brue Catchment Data
The Brue catchment HYREX data are managed by British Atmospheric Data
Centre (BADC) and freely available on request. In this chapter, for daily solar
radiation modelling, the following input parameters were considered: horizontal
extraterrestrial radiation (ETR) (based on Allen et al. [
8
]), mean air temperature
(T
mean
) (averaged over 24 h), maximum daily air temperature (T
max
), minimum
daily air temperature (T
(Tmin),
), wind speed (U) (averaged over 24 h), and rainfall
(P) (summed over 24 h). Different data series used for solar radiation modelling are
shown in Fig.
5.3
.
5.2 Statistical Indices for Data Based Model Comparison
The performances of the developed data based models and the basic benchmark
models in this chapter were compared using various standard statistical perfor-
mance evaluation criteria. The statistical measures considered include the correla-
tion coef
ciency (E),
root mean squared error (RMSE), Mean bias error(MBE) and Variance of the
distribution of differences with MBE (S
2
). These statistical terms can be de
cient (CORR), mean absolute percentage error (MAPE), Ef
ned as
follows:
