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 2003, most days below LDC were in August

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.

30%

63%

58%

24%

32%

38%

days below LDC% of station-days

Sector: Germany · 9 stations

Sector: Germany — Navigation windows 2003
Station	RKM	Jun	Jul	Aug	Sep	Oct	Nov	Dec	days below LDC
Oberndorf	2397.4	6	14	31	28	9	24	12	124
Regensburg Eiserne Brücke	2379.3	4	16	28	26	8	22	13	117
Schwabelweis	2376.5	4	14	20	17	9	18	13	95
Pfatter	2350.7	1	6	26	18	3	10	2	66
Pfelling	2305.5	1	13	29	22	6	18	8	97
Deggendorf	2284.4	1	15	29	24	5	21	9	104
Hofkirchen	2256.9	0	12	28	23	5	10	5	83
Vilshofen	2249.5	0	7	28	18	3	6	1	63
Passau Donau	2226.7	0	0	15	18	4	25	23	85
Sector		17	97	234	194	52	154	86	834

Sector: Austria · 9 stations

Sector: Austria — Navigation windows 2003
Station	RKM	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec	days below LDC
Achleiten	2223.05	0	0	0	0	0	0	6	12	4	21	23	66
Wilhering	2144	0	0	0	0	0	0	0	0	0	0	0	0
Mauthausen	2110	0	0	0	0	0	0	0	0	0	0	0	0
Grein	2079	0	0	0	0	0	0	0	0	0	0	0	0
Ybbs	2058.8	0	0	0	0	0	0	0	0	0	0	0	0
Kienstock	2015	0	0	0	0	0	0	4	3	0	3	11	21
Bärndorf	1976	0	0	0	0	0	0	0	0	0	0	0	0
Korneuburg	1941	0	0	0	0	0	0	4	5	1	5	11	26
Wildungsmauer	1894	14	11	22	1	8	30	30	27	20	30	31	224
Sector		14	11	22	1	8	30	44	47	25	59	76	337

Sector: Slovakia · 3 stations

Sector: Slovakia — Navigation windows 2003
Station	RKM	Feb	Mar	Apr	Jun	Jul	Aug	Sep	Oct	Nov	Dec	days below LDC
Devín	1879	0	0	0	0	1	17	13	4	21	25	81
Bratislava	1868.75	0	0	0	0	0	0	0	0	0	0	0
Medveďov	1806.3	5	3	3	6	26	23	15	5	16	21	123
Sector		5	3	3	6	27	40	28	9	37	46	204

Sector: Hungary · 18 stations

Sector: Hungary — Navigation windows 2003
Station	RKM	Jul	Aug	Sep	Oct	Nov	Dec	days below LDC
Nagybajcs	1801.01	2	21	16	7	21	28	95
Gönyű	1790.55	4	22	15	7	24	29	101
Komárom	1768.35	4	22	15	9	24	28	102
Esztergom	1718.65	4	21	17	7	22	27	98
Szob	1707.2	3	22	19	9	25	28	106
Nagymaros	1694.6	3	21	16	7	22	27	96
Vác	1679.5	2	21	18	8	23	28	100
Budapest	1646.5	0	18	12	6	19	21	76
Budafok	1636.9	0	17	8	3	17	18	63
Ercsi	1613.2	0	6	4	0	2	4	16
Adony	1598.11	0	0	0	0	0	0	0
Dunaújváros	1580.6	0	17	7	3	7	11	45
Dunaföldvár	1560.6	0	8	9	3	5	10	35
Paks	1531.3	0	19	14	7	19	27	86
Dombori	1506.8	0	18	16	8	19	24	85
Baja	1478.7	4	19	20	8	19	26	96
Duna Dunaszekcső	1460	0	16	18	8	8	15	65
Duna Mohács	1446	3	19	19	8	17	25	91
Sector		29	307	243	108	293	376	1356

Sector: Croatia · 5 stations

Sector: Croatia — Navigation windows 2003
Station	RKM	Aug	Sep	Oct	Nov	Dec	days below LDC
Batina	1424.6	19	19	8	16	23	85
Aljmaš	1380.25	16	14	7	0	2	39
Dalj	1353.7	18	13	8	0	4	43
Vukovar	1333.4	18	16	8	2	10	54
Ilok	1298.7	18	14	8	0	4	44
Sector		89	76	39	18	43	265

Sector: Romania · 8 stations

Sector: Romania — Navigation windows 2003
Station	RKM	Jul	Aug	Sep	Oct	Dec	days below LDC
Calafat	795	25	26	29	12	3	95
Corabia	630	27	28	30	13	4	102
Giurgiu	493	24	29	30	15	5	103
Oltenița	430	19	24	25	14	0	82
Cernavodă	300	23	31	30	17	5	106
Hârșova	253	25	31	30	18	0	104
Brăila	170	22	31	30	18	1	102
Tulcea	71	25	31	30	18	0	104
Sector		190	231	234	125	18	798

Sector: Bulgaria · 6 stations

Sector: Bulgaria — Navigation windows 2003
Station	RKM	Jul	Aug	Sep	Oct	Dec	days below LDC
Novo Selo	833	29	29	29	11	5	103
Lom	743	28	30	30	12	6	106
Oryahovo	678	28	31	30	13	10	112
Svishtov	554	27	31	30	14	7	109
Ruse	495	25	29	30	15	5	104
Silistra	375	25	31	30	15	5	106
Sector		162	181	179	80	38	640

Critical stations of the year 2003

Critical stations of the year 2003
Station	countries	days below LDC	station-days with data	%
Wildungsmauer	Austria	224	365	61%
Oberndorf	Germany	124	365	34%
Medveďov	Slovakia	123	358	34%
Regensburg Eiserne Brücke	Germany	117	365	32%
Oryahovo	Bulgaria	112	364	31%

The daily series uses the first reading of each day.