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 1918: Hungary spent the longest below LDC, 4 % of days

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.

4%2%

1918Meanbelow LDC in season

Irrigation season (April–September) 1918
countries	station-days in season	below LDC in season	%	vs. average
Hungary	2,745	108	4%	+2 pp

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	1918-03-15	1918-04-21	38
Baja	Hungary	1918-03-16	1918-04-20	36
Duna Mohács	Hungary	1918-11-15	1918-12-17	33
Baja	Hungary	1918-11-15	1918-12-10	26
Budapest	Hungary	1918-11-20	1918-12-07	18
Dombori	Hungary	1918-11-21	1918-12-08	18
Paks	Hungary	1918-11-22	1918-12-08	17
Duna Mohács	Hungary	1918-06-06	1918-06-19	14
Baja	Hungary	1918-06-06	1918-06-18	13
Dombori	Hungary	1918-06-09	1918-06-17	9

The daily series uses the first reading of each day.