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 2004, 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.

17%

19%

12%

days below LDC% of station-days

Sector: Germany · 9 stations

Sector: Germany — Navigation windows 2004
Station	RKM	Jan	Mar	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec	days below LDC
Oberndorf	2397.4	5	0	0	0	1	16	21	1	2	22	68
Regensburg Eiserne Brücke	2379.3	5	0	0	0	3	18	21	4	2	14	67
Schwabelweis	2376.5	4	1	3	1	4	14	19	4	6	13	69
Pfatter	2350.7	1	0	0	0	1	7	16	0	0	2	27
Pfelling	2305.5	3	0	0	0	0	15	20	0	0	9	47
Deggendorf	2284.4	4	0	0	0	0	7	19	0	0	12	42
Hofkirchen	2256.9	3	0	0	0	0	5	17	0	0	6	31
Vilshofen	2249.5	0	0	0	0	0	0	16	0	0	0	16
Passau Donau	2226.7	10	0	0	0	0	0	5	0	0	18	33
Sector		35	1	3	1	9	82	154	9	10	96	400

Sector: Austria · 9 stations

Sector: Austria — Navigation windows 2004
Station	RKM	Jan	Sep	Dec	days below LDC
Achleiten	2223.05	9	1	15	25
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	6	0	1	7
Bärndorf	1976	0	0	0	0
Korneuburg	1941	7	0	0	7
Wildungsmauer	1894	12	0	12	24
Sector		34	1	28	63

Sector: Slovakia · 3 stations

Sector: Slovakia — Navigation windows 2004
Station	RKM	Jan	Sep	Dec	days below LDC
Devín	1879	9	0	8	17
Bratislava	1868.75	0	0	0	0
Medveďov	1806.3	11	2	11	24
Sector		20	2	19	41

Sector: Hungary · 18 stations

Sector: Hungary — Navigation windows 2004
Station	RKM	Jan	Sep	Oct	Dec	days below LDC
Nagybajcs	1801.01	11	2	0	15	28
Gönyű	1790.55	11	7	0	12	30
Komárom	1768.35	11	8	0	13	32
Esztergom	1718.65	12	8	0	10	30
Szob	1707.2	12	9	2	16	39
Nagymaros	1694.6	11	7	1	13	32
Vác	1679.5	10	7	0	7	24
Budapest	1646.5	10	0	0	4	14
Budafok	1636.9	11	0	0	0	11
Ercsi	1613.2	4	0	0	0	4
Adony	1598.11	0	0	0	0	0
Dunaújváros	1580.6	4	0	0	0	4
Dunaföldvár	1560.6	8	0	0	1	9
Paks	1531.3	13	1	0	5	19
Dombori	1506.8	12	0	0	2	14
Baja	1478.7	13	7	0	0	20
Duna Dunaszekcső	1460	3	1	0	0	4
Duna Mohács	1446	14	7	0	0	21
Sector		170	64	3	98	335

Sector: Croatia · 4 stations

Sector: Croatia — Navigation windows 2004
Station	RKM	Jan	Sep	days below LDC
Batina	1424.6	0	2	2
Aljmaš	1380.25	6	0	6
Vukovar	1333.4	11	0	11
Ilok	1298.7	4	0	4
Sector		21	2	23

Sector: Serbia · 11 stations

Sector: Serbia — Navigation windows 2004
Station	RKM	Jan	Feb	Mar	Aug	Sep	Oct	Nov	Dec	days below LDC
Bezdan	1425	14	0	0	0	4	0	0	0	18
Apatin	1401	12	0	0	0	2	0	0	0	14
Bogojevo	1367	3	0	0	0	0	0	0	0	3
Bačka Palanka	1298	13	0	0	0	0	0	0	0	13
Novi Sad	1255	10	0	0	0	0	0	0	0	10
Slankamen	1216	0	0	0	0	0	0	0	0	0
Zemun	1173	0	0	0	0	0	0	0	0	0
Pančevo	1154	0	0	0	0	3	0	0	0	3
Smederevo	1116	1	0	0	0	2	0	0	0	3
Banatska Palanka	1076	·	·	0	11	10	1	7	2	31
Veliko Gradište	1059	13	2	2	3	6	4	4	5	39
Sector		66	2	2	14	27	5	11	7	134

Sector: Romania · 8 stations

Sector: Romania — Navigation windows 2004
Station	RKM	Aug	Sep	Oct	days below LDC
Calafat	795	0	14	0	14
Corabia	630	0	0	0	0
Giurgiu	493	0	11	0	11
Oltenița	430	2	15	1	18
Cernavodă	300	0	10	0	10
Hârșova	253	0	9	0	9
Brăila	170	0	0	0	0
Tulcea	71	0	0	0	0
Sector		2	59	1	62

Sector: Bulgaria · 6 stations

Sector: Bulgaria — Navigation windows 2004
Station	RKM	Aug	Sep	days below LDC
Novo Selo	833	1	14	15
Lom	743	0	12	12
Oryahovo	678	0	13	13
Svishtov	554	0	13	13
Ruse	495	0	12	12
Silistra	375	0	12	12
Sector		1	76	77

Critical stations of the year 2004

Critical stations of the year 2004
Station	countries	days below LDC	station-days with data	%
Schwabelweis	Germany	69	366	19%
Oberndorf	Germany	68	366	19%
Regensburg Eiserne Brücke	Germany	67	366	18%
Pfelling	Germany	47	366	13%
Deggendorf	Germany	42	366	11%

The daily series uses the first reading of each day.