River habitat and macrophyte surveys on the Drawa River, north-west Poland. Results from 2008 and 2009.

[摘要] This bulletin contains the monthly preliminary observatory results, published to meet the needs of all users of geomagnetic data. Magnetic observatory data are presented as a series of plots of one-minute, hourly and daily values, followed by a table of monthly values. The operation of the observatory and presentation of data are described in the introduction.

[发布机构] Environment Agency

[效力级别] Hydrology