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 1990, most days below LDC were in September

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%

18%

10%

days below LDC% of station-days

Sector: Austria · 7 stations

Sector: Austria — Navigation windows 1990
Station	RKM	Jan	Feb	days below LDC
Achleiten	2223.05	2	2	4
Wilhering	2144	0	0	0
Mauthausen	2110	0	0	0
Grein	2079	0	0	0
Ybbs	2058.8	0	0	0
Kienstock	2015	0	0	0
Bärndorf	1976	0	0	0
Sector		2	2	4

Sector: Hungary · 19 stations

Sector: Hungary — Navigation windows 1990
Station	RKM	Jan	Feb	Aug	Sep	Oct	Dec	days below LDC
Nagybajcs	1801.01	16	8	1	3	13	3	44
Gönyű	1790.55	16	10	1	5	11	1	44
Komárom	1768.35	13	9	2	4	7	0	35
Esztergom	1718.65	6	6	0	4	6	0	22
Szob	1707.2	0	0	0	0	0	0	0
Nagymaros	1694.6	1	1	0	1	0	0	3
Vác	1679.5	6	7	0	4	3	0	20
Óbuda	1654	0	0	0	0	0	0	0
Budapest	1646.5	0	0	0	1	0	0	1
Budafok	1636.9	0	0	0	0	0	0	0
Ercsi	1613.2	0	0	0	0	0	0	0
Adony	1598.11	0	0	0	0	0	0	0
Dunaújváros	1580.6	0	0	0	0	0	0	0
Dunaföldvár	1560.6	0	0	0	0	0	0	0
Paks	1531.3	0	0	0	0	0	0	0
Dombori	1506.8	0	0	0	0	0	0	0
Baja	1478.7	0	0	0	4	3	0	7
Duna Dunaszekcső	1460	0	0	0	0	0	0	0
Duna Mohács	1446	0	0	0	0	0	0	0
Sector		58	41	4	26	43	4	176

Sector: Croatia · 4 stations

Sector: Croatia — Navigation windows 1990
Station	RKM	Sep	days below LDC
Aljmaš	1380.25	0	0
Dalj	1353.7	0	0
Vukovar	1333.4	3	3
Ilok	1298.7	0	0
Sector		3	3

Sector: Bulgaria · 6 stations

Sector: Bulgaria — Navigation windows 1990
Station	RKM	Aug	Sep	Oct	Nov	days below LDC
Novo Selo	833	25	19	1	0	45
Lom	743	28	26	3	0	57
Oryahovo	678	28	29	13	0	70
Svishtov	554	27	30	11	0	68
Ruse	495	27	30	15	1	73
Silistra	375	27	30	22	2	81
Sector		162	164	65	3	394

Critical stations of the year 1990

Critical stations of the year 1990
Station	countries	days below LDC	station-days with data	%
Silistra	Bulgaria	81	365	22%
Ruse	Bulgaria	73	364	20%
Oryahovo	Bulgaria	70	364	19%
Svishtov	Bulgaria	68	365	19%
Lom	Bulgaria	57	365	16%

The daily series uses the first reading of each day.