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.

In 1949, most days below LDC were in October

Navigation windows

Days below LDC per month, by Danube sector from upstream to downstream: when draught is restricted. Minimum navigation depths will appear when the official sources deliver them.

14%

15%

10%

days below LDC% of station-days

Sector: Hungary · 15 stations

Sector: Hungary — Navigation windows 1949
Station	RKM	Jan	days below LDC
Gönyű	1790.55	0	0
Komárom	1768.35	7	7
Esztergom	1718.65	1	1
Nagymaros	1694.6	0	0
Vác	1679.5	0	0
Budapest	1646.5	2	2
Budafok	1636.9	0	0
Ercsi	1613.2	0	0
Adony	1598.11	0	0
Dunaújváros	1580.6	0	0
Dunaföldvár	1560.6	0	0
Paks	1531.3	0	0
Dombori	1506.8	0	0
Baja	1478.7	0	0
Duna Mohács	1446	0	0
Sector		10	10

Sector: Croatia · 3 stations

Sector: Croatia — Navigation windows 1949
Station	RKM	Jan	Feb	Mar	Nov	days below LDC
Aljmaš	1380.25	1	0	0	0	1
Vukovar	1333.4	6	3	0	0	9
Ilok	1298.7	7	6	3	1	17
Sector		14	9	3	1	27

Sector: Bulgaria · 6 stations

Sector: Bulgaria — Navigation windows 1949
Station	RKM	Jan	Feb	Mar	Oct	Nov	days below LDC
Novo Selo	833	3	19	0	22	13	57
Lom	743	1	19	2	19	11	52
Oryahovo	678	0	12	0	23	14	49
Svishtov	554	0	20	7	22	11	60
Ruse	495	0	2	0	5	10	17
Silistra	375	0	13	8	17	11	49
Sector		4	85	17	108	70	284

Critical stations of the year 1949

Critical stations of the year 1949
Station	countries	days below LDC	station-days with data	%
Svishtov	Bulgaria	60	365	16%
Novo Selo	Bulgaria	57	365	16%
Lom	Bulgaria	52	365	14%
Oryahovo	Bulgaria	49	364	13%
Silistra	Bulgaria	49	365	13%

The daily series uses the first reading of each day.