When you work with hydrological data, it is always good to screen and assess the quality of data. These kind of questions must be answered such as how many years of available records? and missing data. Rainfall data will useful if it is no missing data. The missing data will cause the values are less which subsequently cause the rainfall accumulation is less. One of software that I commonly used is HEC-DSSVue.
Besides, for visualization purposes, this software can be used to manipulate data using math function and for database input that will be used in HEC-HMS or HECRAS (see example of rainfall data below).
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