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 2009, 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.

19%

days below LDC% of station-days

Sector: Germany · 9 stations

Sector: Germany — Navigation windows 2009
Station	RKM	Jan	Feb	Aug	Sep	Oct	Nov	days below LDC
Oberndorf	2397.4	1	14	13	25	13	1	67
Regensburg Eiserne Brücke	2379.3	2	9	6	14	10	0	41
Schwabelweis	2376.5	3	9	4	7	2	0	25
Pfatter	2350.7	1	3	1	18	10	0	33
Pfelling	2305.5	0	2	5	23	12	0	42
Deggendorf	2284.4	4	10	1	17	12	0	44
Hofkirchen	2256.9	1	3	1	13	12	0	30
Vilshofen	2249.5	0	0	0	5	10	0	15
Passau Donau	2226.7	13	20	0	2	10	0	45
Sector		25	70	31	124	91	1	342

Sector: Austria · 9 stations

Sector: Austria — Navigation windows 2009
Station	RKM	Jan	Feb	Oct	days below LDC
Achleiten	2223.05	8	18	2	28
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	2	3	0	5
Bärndorf	1976	0	0	0	0
Korneuburg	1941	2	0	0	2
Wildungsmauer	1894	12	14	1	27
Sector		24	35	3	62

Sector: Slovakia · 3 stations

Sector: Slovakia — Navigation windows 2009
Station	RKM	Jan	Feb	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec	days below LDC
Devín	1879	9	11	0	0	0	0	0	2	0	0	22
Bratislava	1868.75	0	0	·	·	·	·	·	·	·	·	0
Medveďov	1806.3	16	14	0	0	0	0	0	3	0	0	33
Sector		25	25	0	0	0	0	0	5	0	0	55

Sector: Hungary · 19 stations

Sector: Hungary — Navigation windows 2009
Station	RKM	Jan	Feb	Jul	Sep	Oct	days below LDC
Nagybajcs	1801.01	14	12	0	0	3	29
Gönyű	1790.55	7	1	0	0	1	9
Komárom	1768.35	16	4	0	0	6	26
Esztergom	1718.65	10	0	0	0	5	15
Szob	1707.2	16	2	0	1	12	31
Nagymaros	1694.6	6	0	0	1	8	15
Vác	1679.5	11	0	0	0	4	15
Óbuda	1654	2	0	·	0	0	2
Budapest	1646.5	2	0	0	0	3	5
Budafok	1636.9	3	0	0	0	0	3
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	2	4
Dunaföldvár	1560.6	4	0	0	0	2	6
Paks	1531.3	11	0	0	0	4	15
Dombori	1506.8	2	0	0	0	1	3
Baja	1478.7	6	0	0	0	4	10
Duna Dunaszekcső	1460	0	0	0	0	0	0
Duna Mohács	1446	3	0	0	0	2	5
Sector		115	19	0	2	57	193

Sector: Croatia · 5 stations

Sector: Croatia — Navigation windows 2009
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 2009
Station	RKM	Jan	Jun	Jul	Aug	Sep	Oct	Nov	Dec	days below LDC
Bezdan	1425	1	0	0	0	0	0	0	0	1
Apatin	1401	5	0	0	0	0	0	0	0	5
Bogojevo	1367	0	0	0	0	0	0	0	0	0
Bačka Palanka	1298	0	0	0	0	0	0	0	0	0
Novi Sad	1255	0	0	0	0	0	0	0	0	0
Slankamen	1216	0	0	0	0	0	2	0	0	2
Zemun	1173	0	0	0	0	0	8	0	0	8
Pančevo	1154	0	0	0	0	1	15	0	0	16
Smederevo	1116	0	0	0	0	2	7	0	0	9
Banatska Palanka	1076	8	2	0	7	18	20	6	8	69
Veliko Gradište	1059	9	8	2	5	13	17	6	12	72
Golubac	1042	0	0	0	0	0	0	0	0	0
Sector		23	10	2	12	34	69	12	20	182

Sector: Romania · 13 stations

Sector: Romania — Navigation windows 2009
Station	RKM	Oct	Dec	days below LDC
Calafat	795	13	0	13
Bechet	679	15	·	15
Corabia	630	8	0	8
Giurgiu	493	10	0	10
Oltenița	430	16	0	16
Călărași	370	11	0	11
Cernavodă	300	14	0	14
Hârșova	253	13	0	13
Brăila	170	12	0	12
Galați	150	9	0	9
Isaccea	103	7	0	7
Tulcea	71	11	0	11
Sulina	0	0	0	0
Sector		139	0	139

Sector: Bulgaria · 6 stations

Sector: Bulgaria — Navigation windows 2009
Station	RKM	Sep	Oct	days below LDC
Novo Selo	833	1	15	16
Lom	743	0	13	13
Oryahovo	678	0	15	15
Svishtov	554	0	15	15
Ruse	495	0	14	14
Silistra	375	0	16	16
Sector		1	88	89

Critical stations of the year 2009

Critical stations of the year 2009
Station	countries	days below LDC	station-days with data	%
Veliko Gradište	Serbia	72	365	20%
Banatska Palanka	Serbia	69	365	19%
Oberndorf	Germany	67	365	18%
Passau Donau	Germany	45	365	12%
Deggendorf	Germany	44	365	12%

The daily series uses the first reading of each day.