Input for rainfall downscaling

What local data do I need to perform a rainfall downscaling?

Input of local data from the city can be given in two ways:

1. A historical time series of short-term rainfall, e.g. from a tipping-bucket gauge. The data can be direct from the instrument, i.e. an asynchronous time series with a time stamp every time the tipping-bucket is full, e.g. (assuming a 0,2 mm bucket):

1991-10-01 19:04 0,2
1991-10-01 19:11 0,2
1991-10-01 19:15 0,2
1991-10-01 19:30 0,2
…………………

or the time series can be based on equidistant time stamps not longer than 30 minutes followed by the rainfall depth (mm) since the last stamp, e.g.:

1981-10-01 19:00 0,8
1981-10-01 19:10 0,4
1981-10-01 19:20 0,0
1981-10-01 19:30 0,0
…………………

The length of the historical time series should cover several years, preferably 10 years or more.

2. Input as an event-based case (Intensity-Duration-Frequency or IDF table). The data gives the rainfall intensity as a function of event duration and return period (i.e. frequency). Input can be a table or just one value representing rain intensity for a specific duration and return period. The IDF table must be associated with a historical period that represents the observations used to calculate the IDF values.

SUDPLAN input data 01