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 2018, 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.

50%

35%

76%

57%

15%

days below LDC% of station-days

Sector: Germany · 9 stations

Sector: Germany — Navigation windows 2018
Station	RKM	Jun	Jul	Aug	Sep	Oct	Nov	Dec	days below LDC
Oberndorf	2397.4	3	28	31	26	27	30	8	153
Regensburg Eiserne Brücke	2379.3	2	28	31	26	28	29	7	151
Schwabelweis	2376.5	5	26	31	26	28	27	10	153
Pfatter	2350.7	0	17	31	24	26	30	6	134
Pfelling	2305.5	0	24	31	27	26	30	6	144
Deggendorf	2284.4	0	24	31	21	26	30	6	138
Hofkirchen	2256.9	0	18	31	19	26	29	3	126
Vilshofen	2249.5	0	7	31	14	26	29	3	110
Passau Donau	2226.7	0	1	17	10	24	29	8	89
Sector		10	173	265	193	237	263	57	1198

Sector: Austria · 9 stations

Sector: Austria — Navigation windows 2018
Station	RKM	Jul	Aug	Sep	Oct	Nov	Dec	days below LDC
Achleiten	2223.05	1	14	9	24	29	9	86
Wilhering	2144	0	0	0	0	0	0	0
Mauthausen	2110	0	0	0	0	0	0	0
Grein	2079	0	0	0	0	0	0	0
Ybbs	2058.8	0	0	0	0	0	0	0
Kienstock	2015	0	8	2	19	25	2	56
Bärndorf	1976	0	0	0	0	0	0	0
Korneuburg	1941	0	0	0	12	13	2	27
Wildungsmauer	1894	2	19	12	22	28	8	91
Sector		3	41	23	77	95	21	260

Sector: Slovakia · 3 stations

Sector: Slovakia — Navigation windows 2018
Station	RKM	Jul	Aug	Sep	Oct	Nov	Dec	days below LDC
Devín	1879	0	9	5	21	25	3	63
Bratislava	1868.75	0	0	0	0	0	0	0
Medveďov	1806.3	3	29	17	27	28	10	114
Sector		3	38	22	48	53	13	177

Sector: Hungary · 20 stations

Sector: Hungary — Navigation windows 2018
Station	RKM	Jul	Aug	Sep	Oct	Nov	Dec	days below LDC
Nagybajcs	1801.01	1	24	13	24	27	9	98
Gönyű	1790.55	0	14	5	22	25	4	70
Komárom	1768.35	2	28	16	25	27	10	108
Esztergom	1718.65	1	28	14	26	26	9	104
Szob	1707.2	2	28	17	27	27	11	112
Nagymaros	1694.6	0	28	15	26	26	10	105
Vác	1679.5	0	27	14	26	26	10	103
Göd	1671	0	8	2	23	23	4	60
Óbuda	1654	0	23	4	24	25	5	81
Budapest	1646.5	0	23	6	25	25	6	85
Budafok	1636.9	0	18	3	24	24	5	74
Ercsi	1613.2	0	7	0	19	20	4	50
Adony	1598.11	0	0	0	0	0	0	0
Dunaújváros	1580.6	0	25	9	26	25	8	93
Dunaföldvár	1560.6	0	28	18	28	25	11	110
Paks	1531.3	0	28	17	28	25	11	109
Dombori	1506.8	0	22	7	26	23	6	84
Baja	1478.7	0	28	14	28	24	9	103
Duna Dunaszekcső	1460	0	27	12	27	22	6	94
Duna Mohács	1446	0	28	16	28	22	7	101
Sector		6	442	202	482	467	145	1744

Sector: Croatia · 5 stations

Sector: Croatia — Navigation windows 2018
Station	RKM	Aug	Sep	Oct	Nov	Dec	days below LDC
Batina	1424.6	28	13	27	20	7	95
Aljmaš	1380.25	7	0	20	4	1	32
Dalj	1353.7	17	1	26	12	3	59
Vukovar	1333.4	·	·	19	5	1	25
Ilok	1298.7	15	2	25	14	3	59
Sector		67	16	117	55	15	270

Sector: Serbia · 12 stations

Sector: Serbia — Navigation windows 2018
Station	RKM	Jan	Mar	Jun	Jul	Aug	Sep	Oct	Nov	Dec	days below LDC
Bezdan	1425	0	0	0	0	28	13	28	21	7	97
Apatin	1401	0	0	0	0	22	14	28	19	10	93
Bogojevo	1367	0	0	0	0	10	0	22	5	1	38
Bačka Palanka	1298	0	0	0	0	13	2	25	9	2	51
Novi Sad	1255	0	0	0	0	23	12	28	15	6	84
Slankamen	1216	0	0	0	0	17	13	28	4	1	63
Zemun	1173	0	0	0	0	15	14	30	8	0	67
Pančevo	1154	0	0	0	0	18	16	31	15	4	84
Smederevo	1116	0	0	0	0	19	19	31	11	1	81
Banatska Palanka	1076	0	1	0	0	16	20	24	16	14	91
Veliko Gradište	1059	2	6	1	11	23	24	29	20	16	132
Golubac	1042	0	3	0	0	0	0	0	0	0	3
Sector		2	10	1	11	204	147	304	143	62	884

Sector: Romania · 13 stations

Sector: Romania — Navigation windows 2018
Station	RKM	Aug	Sep	Oct	Nov	Dec	days below LDC
Calafat	795	18	16	31	16	0	81
Bechet	679	16	15	31	17	1	80
Corabia	630	15	14	31	17	1	78
Giurgiu	493	5	13	31	13	0	62
Oltenița	430	10	14	31	19	5	79
Călărași	370	4	13	31	14	2	64
Cernavodă	300	2	12	31	13	2	60
Hârșova	253	1	10	31	12	0	54
Brăila	170	0	6	31	13	3	53
Galați	150	0	1	14	14	4	33
Isaccea	103	0	5	31	11	2	49
Tulcea	71	0	5	31	12	3	51
Sulina	0	0	0	0	0	0	0
Sector		71	124	355	171	23	744

Sector: Bulgaria · 6 stations

Sector: Bulgaria — Navigation windows 2018
Station	RKM	Aug	Sep	Oct	Nov	Dec	days below LDC
Novo Selo	833	21	16	31	17	1	86
Lom	743	16	14	31	13	0	74
Oryahovo	678	17	15	31	19	3	85
Svishtov	554	9	13	31	16	3	72
Ruse	495	11	13	31	14	1	70
Silistra	375	11	14	31	17	4	77
Sector		85	85	186	96	12	464

Sector: Ukraine · 3 stations

Sector: Ukraine — Navigation windows 2018
Station	RKM	Sep	Oct	Nov	Dec	days below LDC
Reni	127.1	6	31	16	6	59
Izmail	93.6	6	31	17	7	61
Vylkove	18	3	15	4	11	33
Sector		15	77	37	24	153

Critical stations of the year 2018

Critical stations of the year 2018
Station	countries	days below LDC	station-days with data	%
Oberndorf	Germany	153	365	42%
Schwabelweis	Germany	153	365	42%
Regensburg Eiserne Brücke	Germany	151	365	41%
Pfelling	Germany	144	365	39%
Deggendorf	Germany	138	365	38%

The daily series uses the first reading of each day.