Available metrics

Metrics and descriptive statistics currently implemented in tidyhydro v0.1.2

Goodness-of-fit criteria

Name	Abbr.	Function calls	Reference
Kling-Gupta Efficiency	\(KGE\)	kge	Gupta, H.V.; Kling, H.; Yilmaz, K.K.; Martinez, G.F. (2009). Journal of Hydrology, 377(1–2), 80–91.
Modified Kling-Gupta Efficiency	\(KGE'\)	kge2012	Kling, H., Fuchs, M., & Paulin, M. (2012). Journal of Hydrology, 424–425, 264–277.
Log-transformed Kling-Gupta Efficiency	\(KGE_{log}\)	kgelog, kgelog_low, kgelog_hi	Kling, J. (2023). Journal of Hydrology, 620, 129414.
Nash-Sutcliffe Efficiency	\(NSE\)	nse	Nash, J. E., & Sutcliffe, J. V. (1970). Journal of Hydrology, 10(3), 282–290.
Mean Squared Error	\(MSE\)	mse	Clark, M. P., Vogel, R. M., Lamontagne, J. R., Mizukami, N., Knoben, W. J. M., Tang, G., Gharari, S., Freer, J. E., Whitfield, P. H., Shook, K. R., & Papalexiou, S. M. (2021). The Abuse of Popular Performance Metrics in Hydrologic Modeling. Water Resources Research, 57(9), e2020WR029001.
Percent BIAS	\(pBIAS\)	pbias	Gupta, H. V., S. Sorooshian, and P. O. Yapo. (1999). Status of automatic calibration for hydrologic models: Comparison with multilevel expert calibration. J. Hydrologic Eng. 4(2): 135-143

Regression

Name	Abbr.	Function calls	Reference
PRediction Error Sum of Squares	\(PRESS\)	press	Rasmussen, P. P., Gray, J. R., Glysson, G. D. & Ziegler, A. C. Guidelines and procedures for computing time-series suspended-sediment concentrations and loads from in-stream turbidity-sensor and streamflow data. in U.S. Geological Survey Techniques and Methods book 3, chap. C4 53 (2009)
Standard Factorial Error	\(SFE\)	sfe	Herschy, R.W. 1978: Accuracy. Chapter 10 In: Herschy, R.W. (ed.) Hydrometry - principles and practices. John Wiley and Sons, Chichester, 511 p.