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 2020, most days below LDC were in January

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.

12%

10%

days below LDC% of station-days

Sector: Germany · 9 stations

Sector: Germany — Navigation windows 2020
Station	RKM	Jan	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec	days below LDC
Oberndorf	2397.4	15	6	12	5	15	18	17	9	15	22	134
Regensburg Eiserne Brücke	2379.3	9	8	13	6	16	19	17	8	16	21	133
Schwabelweis	2376.5	8	10	16	5	13	16	15	6	16	18	123
Pfatter	2350.7	3	0	7	4	5	10	11	1	3	4	48
Pfelling	2305.5	6	0	9	5	6	13	15	0	8	20	82
Deggendorf	2284.4	7	0	11	7	0	9	11	0	8	18	71
Hofkirchen	2256.9	4	0	8	6	0	7	11	0	1	16	53
Vilshofen	2249.5	1	0	3	7	0	10	11	0	1	8	41
Passau Donau	2226.7	10	0	0	1	0	0	1	0	2	15	29
Sector		63	24	79	46	55	102	109	24	70	142	714

Sector: Austria · 9 stations

Sector: Austria — Navigation windows 2020
Station	RKM	Jan	Nov	Dec	days below LDC
Achleiten	2223.05	11	5	20	36
Wilhering	2144	0	0	0	0
Mauthausen	2110	0	0	0	0
Grein	2079	0	0	0	0
Ybbs	2058.8	0	0	0	0
Kienstock	2015	1	0	3	4
Bärndorf	1976	0	0	0	0
Korneuburg	1941	0	0	0	0
Wildungsmauer	1894	17	2	13	32
Sector		29	7	36	72

Sector: Slovakia · 3 stations

Sector: Slovakia — Navigation windows 2020
Station	RKM	Jan	Feb	Apr	Sep	Nov	Dec	days below LDC
Devín	1879	0	0	0	0	0	0	0
Bratislava	1868.75	0	0	0	0	0	0	0
Medveďov	1806.3	22	1	2	2	1	19	47
Sector		22	1	2	2	1	19	47

Sector: Hungary · 20 stations

Sector: Hungary — Navigation windows 2020
Station	RKM	Jan	Feb	Sep	Nov	Dec	days below LDC
Nagybajcs	1801.01	11	0	1	1	4	17
Gönyű	1790.55	0	0	0	0	0	0
Komárom	1768.35	6	0	1	0	3	10
Esztergom	1718.65	3	0	0	0	1	4
Szob	1707.2	12	1	2	0	4	19
Nagymaros	1694.6	6	0	1	0	3	10
Vác	1679.5	3	0	1	0	2	6
Göd	1671	0	0	0	0	0	0
Óbuda	1654	0	0	0	0	0	0
Budapest	1646.5	1	0	0	0	0	1
Budafok	1636.9	0	0	0	0	0	0
Ercsi	1613.2	0	0	0	0	0	0
Adony	1598.11	0	0	0	0	0	0
Dunaújváros	1580.6	2	0	0	0	0	2
Dunaföldvár	1560.6	11	2	1	0	4	18
Paks	1531.3	12	3	2	0	8	25
Dombori	1506.8	0	0	0	0	0	0
Baja	1478.7	2	0	1	0	0	3
Duna Dunaszekcső	1460	0	0	0	0	0	0
Duna Mohács	1446	0	0	1	0	0	1
Sector		69	6	11	1	29	116

Sector: Croatia · 5 stations

Sector: Croatia — Navigation windows 2020
Station	RKM	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec	days below LDC
Batina	1424.6	0	0	0	0	0	0	0	0	0	0	0	0	0
Aljmaš	1380.25	0	0	0	0	0	0	0	0	0	0	0	0	0
Dalj	1353.7	0	0	0	0	0	0	0	0	0	0	0	0	0
Vukovar	1333.4	0	0	0	0	0	0	0	0	0	0	0	0	0
Ilok	1298.7	0	0	0	0	0	0	0	0	0	0	0	0	0
Sector		0	0	0	0	0	0	0	0	0	0	0	0	0

Sector: Serbia · 12 stations

Sector: Serbia — Navigation windows 2020
Station	RKM	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec	days below LDC
Bezdan	1425	0	0	0	0	0	0	0	0	0	0	0	0	0
Apatin	1401	0	0	0	·	0	0	0	0	0	0	0	0	0
Bogojevo	1367	0	0	0	0	0	0	0	0	0	0	0	0	0
Bačka Palanka	1298	0	0	0	0	0	0	0	0	0	0	0	0	0
Novi Sad	1255	0	0	0	0	0	0	0	0	0	0	0	0	0
Slankamen	1216	0	0	0	0	0	0	0	0	0	0	0	0	0
Zemun	1173	0	0	0	0	0	0	0	0	1	0	0	0	1
Pančevo	1154	10	0	0	0	0	0	0	0	6	0	0	0	16
Smederevo	1116	9	0	0	1	0	0	0	0	5	0	0	1	16
Banatska Palanka	1076	17	0	0	9	2	1	0	9	13	1	2	7	61
Veliko Gradište	1059	26	3	4	27	17	4	3	18	15	3	11	17	148
Golubac	1042	0	0	0	0	0	0	0	0	0	0	0	0	0
Sector		62	3	4	37	19	5	3	27	40	4	13	25	242

Sector: Romania · 13 stations

Sector: Romania — Navigation windows 2020
Station	RKM	Jan	Feb	Jun	Sep	Oct	days below LDC
Calafat	795	5	3	0	8	0	16
Bechet	679	5	4	0	7	2	18
Corabia	630	5	4	0	7	2	18
Giurgiu	493	0	5	0	3	3	11
Oltenița	430	2	6	1	3	3	15
Călărași	370	0	6	0	3	5	14
Cernavodă	300	0	2	0	0	4	6
Hârșova	253	0	5	0	0	5	10
Brăila	170	0	5	0	0	5	10
Galați	150	0	2	0	2	5	9
Isaccea	103	0	6	0	0	2	8
Tulcea	71	2	6	0	0	0	8
Sulina	0	0	0	0	0	0	0
Sector		19	54	1	33	36	143

Sector: Bulgaria · 6 stations

Sector: Bulgaria — Navigation windows 2020
Station	RKM	Jan	Feb	Apr	Sep	Oct	days below LDC
Novo Selo	833	8	3	1	8	0	20
Lom	743	1	2	0	5	0	8
Oryahovo	678	8	5	0	8	2	23
Svishtov	554	4	5	0	5	2	16
Ruse	495	3	6	0	4	3	16
Silistra	375	5	8	0	6	5	24
Sector		29	29	1	36	12	107

Sector: Ukraine · 3 stations

Sector: Ukraine — Navigation windows 2020
Station	RKM	Jan	Feb	Apr	May	Sep	Oct	days below LDC
Reni	127.1	1	9	0	0	2	5	17
Izmail	93.6	5	7	4	1	3	5	25
Vylkove	18	5	0	0	0	0	0	5
Sector		11	16	4	1	5	10	47

Critical stations of the year 2020

Critical stations of the year 2020
Station	countries	days below LDC	station-days with data	%
Veliko Gradište	Serbia	148	366	40%
Oberndorf	Germany	134	366	37%
Regensburg Eiserne Brücke	Germany	133	366	36%
Schwabelweis	Germany	123	366	34%
Pfelling	Germany	82	366	22%

The daily series uses the first reading of each day.