Statistics

Statistics by country and year

Yearly summaries computed from the daily readings of every station: how many station-days were spent below the low-water level (LDC) or above the high-water level (HDC) — as a count and as a share of the station-days with thresholds. Useful for agriculture (irrigation seasons with low water) and navigation (days with restricted draught).

Agriculture: station-days below LDC mark the low-water periods when irrigation intakes and water availability are under pressure.
Navigation: days below LDC mean draught restrictions on that sector; days above HDC mean suspended traffic.

Daily data from 1879 to 6 November 2026

Download this tab’s data (CSV)

LDC: Low-water mark. The river stays above it on 94 of 100 ice-free days; below it, ships cannot sail fully loaded.
HDC: High-water mark. The river exceeds it on 1 day in 100; above it, navigation can be suspended.
Station-days: One station-day is one station measured for one day: 13 stations over 10 days make 130 station-days. It shows how widely and how long something lasted.

Irrigation season (April–September)

Station-days below LDC in the irrigation season, by country and year, against the average of the other years; the longest uninterrupted spells below LDC.

15%

11%

13%

Show all yearsbelow LDC in season

Irrigation season (April–September)
countries	station-days in season	below LDC in season	%
Germany	44,652	6,480	15%
Austria	78,292	855	1%
Slovakia	12,967	325	3%
Hungary	391,276	7,198	2%
Croatia	67,142	625	1%
Serbia	49,187	5,458	11%
Romania	53,853	6,745	13%
Bulgaria	94,245	5,305	6%
Ukraine	4,941	425	9%

Longest spells below LDC

Uninterrupted periods of at least 5 days below LDC, by station.

Longest spells below LDC
Station	countries	From	To	days
Duna Mohács	Hungary	1911-08-09	1912-01-01	146
Bärndorf	Austria	1983-08-15	1983-12-24	132
Calafat	Romania	2026-06-26	2026-11-04	132
Bechet	Romania	2026-06-28	2026-11-04	130
Oltenița	Romania	2026-06-29	2026-11-04	129
Corabia	Romania	2026-06-29	2026-11-04	129
Giurgiu	Romania	2026-06-30	2026-11-04	128
Brăila	Romania	2026-07-03	2026-11-04	125
Galați	Romania	2026-07-03	2026-11-04	125
Hârșova	Romania	2026-07-03	2026-11-04	125

The daily series uses the first reading of each day.