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 1991, 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.

15%

11%

19%

14%

12%

days below LDC% of station-days

Sector: Austria · 7 stations

Sector: Austria — Navigation windows 1991
Station	RKM	Feb	Apr	Oct	Nov	Dec	days below LDC
Achleiten	2223.05	8	5	15	7	15	50
Wilhering	2144	0	0	0	0	0	0
Mauthausen	2110	0	0	0	0	0	0
Grein	2079	0	0	0	0	0	0
Ybbs	2058.8	0	0	0	0	0	0
Kienstock	2015	1	0	1	4	6	12
Bärndorf	1976	0	0	0	0	0	0
Sector		9	5	16	11	21	62

Sector: Hungary · 19 stations

Sector: Hungary — Navigation windows 1991
Station	RKM	Jan	Feb	Mar	Apr	May	Sep	Oct	Nov	Dec	days below LDC
Nagybajcs	1801.01	2	26	4	16	3	2	23	14	18	108
Gönyű	1790.55	0	23	2	10	2	19	27	15	17	115
Komárom	1768.35	0	23	0	4	1	16	25	11	13	93
Esztergom	1718.65	0	16	0	0	0	0	21	10	10	57
Szob	1707.2	0	0	0	0	0	0	0	0	0	0
Nagymaros	1694.6	0	8	0	0	0	0	10	8	10	36
Vác	1679.5	0	16	0	0	0	3	22	10	9	60
Óbuda	1654	0	4	0	0	0	0	4	9	5	22
Budapest	1646.5	0	3	0	0	0	0	5	8	4	20
Budafok	1636.9	0	0	0	0	0	0	2	7	2	11
Ercsi	1613.2	0	0	0	0	0	0	0	0	0	0
Adony	1598.11	0	0	0	0	0	0	0	0	0	0
Dunaújváros	1580.6	0	0	0	0	0	0	0	0	0	0
Dunaföldvár	1560.6	0	0	0	0	0	0	0	0	0	0
Paks	1531.3	0	0	0	0	0	0	2	9	4	15
Dombori	1506.8	0	0	0	0	0	0	0	6	0	6
Baja	1478.7	0	6	0	0	0	0	8	10	2	26
Duna Dunaszekcső	1460	0	1	0	0	0	0	0	0	0	1
Duna Mohács	1446	0	4	0	0	0	0	0	3	0	7
Sector		2	130	6	30	6	40	149	120	94	577

Sector: Croatia · 4 stations

Sector: Croatia — Navigation windows 1991
Station	RKM	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec	days below LDC
Aljmaš	1380.25	0	0	0	0	·	·	·	·	·	·	·	0
Dalj	1353.7	0	·	·	·	·	·	·	·	·	·	·	0
Vukovar	1333.4	6	0	0	0	0	0	0	·	·	·	·	6
Ilok	1298.7	0	0	0	0	0	0	·	·	·	·	·	0
Sector		6	0	0	0	0	0	0	·	·	·	·	6

Sector: Bulgaria · 6 stations

Sector: Bulgaria — Navigation windows 1991
Station	RKM	Feb	Sep	Oct	days below LDC
Novo Selo	833	0	9	1	10
Lom	743	2	11	3	16
Oryahovo	678	2	13	5	20
Svishtov	554	0	7	0	7
Ruse	495	2	12	3	17
Silistra	375	3	12	11	26
Sector		9	64	23	96

Critical stations of the year 1991

Critical stations of the year 1991
Station	countries	days below LDC	station-days with data	%
Gönyű	Hungary	115	363	32%
Nagybajcs	Hungary	108	365	30%
Komárom	Hungary	93	365	25%
Vác	Hungary	60	365	16%
Esztergom	Hungary	57	365	16%

The daily series uses the first reading of each day.