Hydrological Models and Artificial Neural Networks (ANNs) to Simulate Streamflow in a Tropical Catchment of Sri Lanka

Table 2

Hydrological model performance under different precipitation data sets.

Precipitation products	Calibration			Validation
	R^2	NSE	PEV (%)	R^2	NSE	PEV (%)
Observed rainfall	0.81	0.79	0.56	0.71	0.57	0.01
PERSIANN	0.11	−0.76	45	0.01	−1.4	60
PERSIANN-CCS	0.05	−1.14	52	0.01	−1.45	58
PERSIANN-CDR	0.07	−1.06	57	0.01	−1.45	65

NSE denotes Nash–Sutcliffe efficiency and PEV denotes percentage error in volume.