A program in any of these computer language will be very much useful , for which I am looking to have to execute mine old versions of fortran codes ( F77/PWB) and refine them for predictions of surface runoff ( overland as well channel) using simpler historical approaches ..taking variations from simpler ( say open book KW configuration of woolhhiser) to complex ones. hope to have some help/ inputs/guidance/words of advise from my friends and colleagues here..which ultimately targeted to be passed on to fresh graduates and under graduates for having insights on performances of old versus new concepts of surface runoff computation and routing ...