RadoHydro

Radohydro is a small python tool which processes time series precipitation records from DWD Radolan data and among others map them on polygon shapefiles (e.g. representing subcatchments/catchments)

Features

• Automatize download and unzip from dwd ftp server for given time interval
• Fully stream-based solution
• Automatic reprojection to destination EPSG given by user
• Equal-area approach to compute precipitation rates per basin per time
• Output 1) as csv files containing time series for each basin and
  2) as polygon shapefile having the precipitation rates as attribute tables
• Download from DWD regnie datasets supported

Limitations

• until now supports only download of hourly datasets and full day downloads
• for more than 500 precipation records(~21days), output as shp is not supported (dbase problem)
• large amounts of polygons per shapefile (>10000) may lead to considerable performance decrease
• WARNING: geopandas >0.7.0 may cause trouble on windows machines by using overlay function

Quickstart

import radohydro
radohydro.radohydro(start_date='20171230',
              end_date='20180102',
              shape_inpt='.\Examples\einzugsgebiet.shp',
              datasource='radolan',
              outpt_proj='epsg:25833',
              Output=True)

Authors

• Erik Nixdorf
• Marco Hannemann

Acknowledgments

• Thx to Nico Trauth for improving the code and the discussions