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 2021, most days below LDC were in November

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.

11%

10%

30%

40%

days below LDC% of station-days

Sector: Germany · 9 stations

Sector: Germany — Navigation windows 2021
Station	RKM	Jan	Apr	May	Sep	Oct	Nov	Dec	days below LDC
Oberndorf	2397.4	23	2	0	2	20	22	2	71
Regensburg Eiserne Brücke	2379.3	20	8	1	1	17	16	1	64
Schwabelweis	2376.5	16	9	2	2	16	19	3	67
Pfatter	2350.7	4	0	0	1	5	6	1	17
Pfelling	2305.5	17	0	0	0	5	13	2	37
Deggendorf	2284.4	19	0	0	0	2	12	2	35
Hofkirchen	2256.9	16	0	0	0	0	5	0	21
Vilshofen	2249.5	17	0	0	0	0	0	0	17
Passau Donau	2226.7	22	0	0	0	6	15	1	44
Sector		154	19	3	6	71	108	12	373

Sector: Austria · 9 stations

Sector: Austria — Navigation windows 2021
Station	RKM	Jan	Apr	Oct	Nov	Dec	days below LDC
Achleiten	2223.05	24	7	9	16	3	59
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	13	0	2	7	0	22
Bärndorf	1976	0	0	0	0	0	0
Korneuburg	1941	0	0	0	0	0	0
Wildungsmauer	1894	23	0	8	16	1	48
Sector		60	7	19	39	4	129

Sector: Slovakia · 3 stations

Sector: Slovakia — Navigation windows 2021
Station	RKM	Jan	Oct	Nov	Dec	days below LDC
Devín	1879	0	1	6	0	7
Bratislava	1868.75	0	0	0	0	0
Medveďov	1806.3	18	20	24	4	66
Sector		18	21	30	4	73

Sector: Hungary · 20 stations

Sector: Hungary — Navigation windows 2021
Station	RKM	Jan	Oct	Nov	Dec	days below LDC
Nagybajcs	1801.01	9	8	17	1	35
Gönyű	1790.55	0	0	10	0	10
Komárom	1768.35	2	12	22	3	39
Esztergom	1718.65	0	8	20	2	30
Szob	1707.2	2	13	23	2	40
Nagymaros	1694.6	0	6	21	2	29
Vác	1679.5	0	10	24	2	36
Göd	1671	0	0	7	0	7
Óbuda	1654	0	1	12	2	15
Budapest	1646.5	0	3	12	2	17
Budafok	1636.9	0	5	12	2	19
Ercsi	1613.2	0	0	1	0	1
Adony	1598.11	0	0	0	0	0
Dunaújváros	1580.6	0	5	15	3	23
Dunaföldvár	1560.6	3	14	24	3	44
Paks	1531.3	7	16	26	8	57
Dombori	1506.8	0	4	15	3	22
Baja	1478.7	0	14	22	4	40
Duna Dunaszekcső	1460	0	4	14	4	22
Duna Mohács	1446	0	9	17	4	30
Sector		23	132	314	47	516

Sector: Croatia · 5 stations

Sector: Croatia — Navigation windows 2021
Station	RKM	Oct	Nov	Dec	days below LDC
Batina	1424.6	10	18	4	32
Aljmaš	1380.25	0	2	0	2
Dalj	1353.7	1	9	0	10
Vukovar	1333.4	0	5	0	5
Ilok	1298.7	3	11	1	15
Sector		14	45	5	64

Sector: Serbia · 12 stations

Sector: Serbia — Navigation windows 2021
Station	RKM	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec	days below LDC
Bezdan	1425	0	0	0	0	0	0	13	20	4	37
Apatin	1401	0	0	0	0	0	0	16	24	5	45
Bogojevo	1367	0	0	0	0	0	0	0	1	0	1
Bačka Palanka	1298	0	0	0	0	0	0	3	11	1	15
Novi Sad	1255	0	0	0	0	0	0	8	18	2	28
Slankamen	1216	0	0	0	0	0	0	6	14	1	21
Zemun	1173	0	0	0	0	0	5	10	12	0	27
Pančevo	1154	0	0	0	0	0	7	12	11	0	30
Smederevo	1116	0	0	0	0	0	5	13	9	1	28
Banatska Palanka	1076	2	0	0	1	1	12	20	16	3	55
Veliko Gradište	1059	5	5	2	4	6	16	26	20	7	91
Golubac	1042	0	0	0	0	0	0	0	0	0	0
Sector		7	5	2	5	7	45	127	156	24	378

Sector: Romania · 13 stations

Sector: Romania — Navigation windows 2021
Station	RKM	Sep	Oct	Nov	Dec	days below LDC
Calafat	795	14	23	15	1	53
Bechet	679	13	22	14	2	51
Corabia	630	12	21	14	2	49
Giurgiu	493	10	20	12	3	45
Oltenița	430	10	21	14	4	49
Călărași	370	9	21	13	4	47
Cernavodă	300	7	19	12	3	41
Hârșova	253	5	19	12	4	40
Brăila	170	6	9	13	4	32
Galați	150	7	19	13	4	43
Isaccea	103	3	1	10	0	14
Tulcea	71	0	0	1	0	1
Sulina	0	0	0	0	0	0
Sector		96	195	143	31	465

Sector: Bulgaria · 6 stations

Sector: Bulgaria — Navigation windows 2021
Station	RKM	Sep	Oct	Nov	Dec	days below LDC
Novo Selo	833	15	23	17	0	55
Lom	743	13	22	13	1	49
Oryahovo	678	13	23	19	2	57
Svishtov	554	11	21	14	2	48
Ruse	495	11	22	13	3	49
Silistra	375	10	22	18	5	55
Sector		73	133	94	13	313

Critical stations of the year 2021

Critical stations of the year 2021
Station	countries	days below LDC	station-days with data	%
Veliko Gradište	Serbia	91	365	25%
Oberndorf	Germany	71	365	19%
Schwabelweis	Germany	67	365	18%
Medveďov	Slovakia	66	365	18%
Regensburg Eiserne Brücke	Germany	64	365	18%

The daily series uses the first reading of each day.