“…To quantify the relevance of the different covariates, the connection weight approach (Olden & Jackson, ; Olden, Joy, & Death, ) is employed, where W V (−) is the relevance of covariate V, A V,h (−) are the ANN coefficients connecting hidden unit h to covariate V, B h (−) are the ANN coefficients connecting hidden unit h to the output, and nhu is the number of hidden units. ANNs have been widely used as black box tools for modelling the rainfall‐runoff transform (see (ASCE, , ) for a review and (Abdollahi, Raeisi, Khalilianpour, Ahmadi, & Kisi, ) for a recent application to an intermittent river).…”