This article describes the development and implementation of an integrated hydrological management and reporting system on a microcomputer. The system involves the use of peripherals for digitizing, EPROM (Erasable Programmable Read Only Memory) or RAM downloading, storage, reporting, and archiving of hydrological data. Hydrological information is stored on hard disk in compact formats according to the type of data. Self‐correcting data routines coupled with simple screen drivers for user interfacing allow semiskilled operators to use the system. An on‐line help facility is an integral part of the user interface. Both pattern and color recognition by the operator are used to detect discrepancies in the d