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 5 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.

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.

10%

13%

10%

days below LDC% of station-days

Sector: Germany · 11 stations

Sector: Germany — Navigation windows
Station	RKM	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec	days below LDC
Kelheim Donau	2414.8	·	·	·	·	·	·	·	·	·	8	5	·	13
Oberndorf	2397.4	108	43	16	53	90	94	201	253	292	259	240	150	1799
Regensburg Eiserne Brücke	2379.3	89	33	10	60	82	106	238	259	274	255	218	127	1751
Schwabelweis	2376.5	72	31	22	80	103	120	242	253	256	242	219	142	1782
Pfatter	2350.7	37	8	0	10	46	63	130	163	180	138	109	46	930
Straubing	2321.29	10	0	0	1	16	13	28	29	30	29	5	3	164
Pfelling	2305.5	74	13	0	16	68	73	172	208	226	178	153	82	1263
Deggendorf	2284.4	93	28	1	25	84	82	164	176	191	171	158	97	1270
Hofkirchen	2256.9	53	13	0	5	62	51	131	156	157	142	101	54	925
Vilshofen	2249.5	45	6	0	8	50	38	88	138	121	112	73	35	714
Passau Donau	2226.7	151	61	29	9	20	2	30	75	89	160	186	167	979
Sector		732	236	78	267	621	642	1424	1710	1816	1694	1467	903	11590

Sector: Austria · 10 stations

Sector: Austria — Navigation windows
Station	RKM	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec	days below LDC
Achleiten	2223.05	152	95	50	12	6	0	4	30	45	171	238	247	1050
Wilhering	2144	55	19	13	1	0	0	3	0	0	33	36	35	195
Mauthausen	2110	0	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	0
Ybbs	2058.8	290	169	121	2	0	0	10	1	64	222	279	284	1442
Kienstock	2015	60	6	6	0	0	0	0	15	6	65	83	75	316
Dürnstein	2009	·	·	·	·	·	·	·	·	·	0	·	·	0
Bärndorf	1976	183	113	87	32	5	3	31	44	139	149	156	132	1074
Korneuburg	1941	74	42	22	1	0	0	0	8	27	34	53	35	296
Wildungsmauer	1894	290	153	85	41	13	18	53	122	119	213	279	255	1641
Sector		1104	597	384	89	24	21	101	220	400	887	1124	1063	6014

Sector: Slovakia · 9 stations

Sector: Slovakia — Navigation windows
Station	RKM	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec	days below LDC
Devín	1879	59	26	3	0	0	0	1	30	24	68	122	82	415
Bratislava	1868.75	1	0	0	0	0	0	0	0	3	0	0	0	4
Medveďov	1806.3	158	53	49	12	12	14	53	83	93	170	198	190	1085
Kližská Nemá	1792.4	·	·	·	·	·	·	·	·	·	9	2	·	11
Zlatná na Ostrove	1779.1	·	·	·	·	·	·	·	·	·	9	2	·	11
Komárno	1767.8	·	·	·	·	·	·	·	·	·	10	2	·	12
Iža	1763.96	·	·	·	·	·	·	·	·	·	9	2	·	11
Radvaň n/Dunajom	1748.25	·	·	·	·	·	·	·	·	·	9	2	·	11
Štúrovo	1718.6	·	·	·	·	·	·	·	·	·	10	2	·	12
Sector		218	79	52	12	12	14	54	113	120	294	332	272	1572

Sector: Hungary · 20 stations

Sector: Hungary — Navigation windows
Station	RKM	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec	days below LDC
Nagybajcs	1801.01	185	126	55	23	21	6	43	99	110	234	236	208	1346
Gönyű	1790.55	145	107	36	10	2	0	26	85	113	219	215	147	1105
Komárom	1768.35	240	109	50	21	36	15	56	125	176	338	351	311	1828
Esztergom	1718.65	137	72	35	9	32	11	51	115	130	273	253	170	1288
Szob	1707.2	121	51	29	12	35	12	55	113	125	200	211	149	1113
Nagymaros	1694.6	90	34	21	8	26	8	49	107	121	213	227	148	1052
Vác	1679.5	145	68	29	6	23	6	48	113	133	286	313	178	1348
Göd	1671	20	1	0	0	1	1	27	49	31	77	35	7	249
Óbuda	1654	102	30	9	10	5	1	31	89	54	161	153	76	721
Budapest	1646.5	419	208	86	16	13	12	36	116	216	476	525	534	2657
Budafok	1636.9	92	15	3	3	11	1	37	82	63	126	121	66	620
Ercsi	1613.2	36	1	0	0	0	0	25	53	34	65	29	18	261
Adony	1598.11	0	0	0	0	0	0	0	0	0	0	0	0	0
Dunaújváros	1580.6	68	14	10	5	24	6	45	88	70	126	107	57	620
Dunaföldvár	1560.6	102	25	35	17	37	17	57	100	106	165	156	96	913
Paks	1531.3	292	139	118	38	48	40	62	132	265	470	555	541	2700
Dombori	1506.8	209	102	79	24	21	22	43	111	231	463	506	450	2261
Baja	1478.7	383	268	178	79	69	54	111	258	438	701	733	630	3902
Duna Dunaszekcső	1460	59	17	3	3	27	8	50	95	97	146	106	74	685
Duna Mohács	1446	346	264	171	77	56	49	99	253	434	679	686	611	3725
Sector		3191	1651	947	361	487	269	951	2183	2947	5418	5518	4471	28394

Sector: Croatia · 5 stations

Sector: Croatia — Navigation windows
Station	RKM	Jan	Feb	Mar	Apr	Jun	Jul	Aug	Sep	Oct	Nov	Dec	days below LDC
Batina	1424.6	26	3	5	0	5	23	72	76	134	120	62	526
Aljmaš	1380.25	39	7	0	0	0	15	39	22	58	33	28	241
Dalj	1353.7	11	0	0	0	2	18	54	29	84	44	33	275
Vukovar	1333.4	195	72	8	0	0	17	37	57	93	116	166	761
Ilok	1298.7	230	86	17	8	4	21	54	72	219	177	184	1072
Sector		501	168	30	8	11	94	256	256	588	490	473	2875

Sector: Serbia · 12 stations

Sector: Serbia — Navigation windows
Station	RKM	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec	days below LDC
Bezdan	1425	75	15	12	6	30	16	52	92	102	157	117	42	716
Apatin	1401	78	18	6	3	27	8	52	82	92	158	109	46	679
Bogojevo	1367	41	3	0	1	14	0	43	57	41	75	20	15	310
Bačka Palanka	1298	70	6	4	2	25	6	50	64	55	108	57	22	469
Novi Sad	1255	60	5	10	1	26	16	53	91	102	142	87	31	624
Slankamen	1216	22	0	5	0	22	16	53	109	112	148	63	19	569
Zemun	1173	17	0	0	0	7	10	60	133	158	180	73	17	655
Pančevo	1154	35	0	0	0	13	17	90	171	211	227	92	27	883
Smederevo	1116	32	4	1	4	29	21	96	174	201	216	86	32	896
Banatska Palanka	1076	128	47	32	40	78	120	224	318	377	367	229	144	2104
Veliko Gradište	1059	206	113	99	126	135	126	250	328	354	390	296	196	2619
Golubac	1042	5	0	22	13	35	15	0	0	3	0	0	0	93
Sector		769	211	191	196	441	371	1023	1619	1808	2168	1229	591	10617

Sector: Romania · 13 stations

Sector: Romania — Navigation windows
Station	RKM	Jan	Feb	Mar	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec	days below LDC
Calafat	795	40	14	0	16	34	142	223	293	245	117	26	1150
Bechet	679	46	18	0	8	21	111	196	257	242	112	27	1038
Corabia	630	39	13	0	7	14	131	220	256	231	104	24	1039
Giurgiu	493	22	5	0	4	8	111	181	255	222	108	27	943
Oltenița	430	31	6	1	11	20	112	193	272	237	131	30	1044
Călărași	370	21	6	0	5	5	93	171	233	230	114	27	905
Cernavodă	300	10	2	0	0	4	100	206	262	227	108	32	951
Hârșova	253	12	5	0	0	4	105	183	266	228	103	26	932
Brăila	170	13	5	0	0	3	106	200	258	223	102	31	941
Galați	150	17	2	0	0	2	86	171	219	197	106	31	831
Isaccea	103	42	27	0	0	3	64	143	215	182	96	43	815
Tulcea	71	19	6	0	0	3	90	173	236	222	96	27	872
Sulina	0	0	0	0	0	0	18	22	0	0	0	0	40
Sector		312	109	1	51	121	1269	2282	3022	2686	1297	351	11501

Sector: Bulgaria · 6 stations

Sector: Bulgaria — Navigation windows
Station	RKM	Jan	Feb	Mar	Apr	Jun	Jul	Aug	Sep	Oct	Nov	Dec	days below LDC
Novo Selo	833	100	45	2	1	12	124	311	417	465	249	109	1835
Lom	743	92	38	2	0	9	109	278	395	465	230	111	1729
Oryahovo	678	124	57	1	0	11	119	385	556	634	351	126	2364
Svishtov	554	58	26	7	0	6	90	283	429	471	276	113	1759
Ruse	495	42	17	0	0	10	100	267	371	392	211	99	1509
Silistra	375	30	61	18	0	11	119	347	545	571	394	119	2215
Sector		446	244	30	1	59	661	1871	2713	2998	1711	677	11411

Sector: Ukraine · 3 stations

Sector: Ukraine — Navigation windows
Station	RKM	Jan	Feb	Mar	Apr	May	Jul	Aug	Sep	Oct	Nov	Dec	days below LDC
Reni	127.1	17	9	0	0	0	11	66	105	103	44	9	364
Izmail	93.6	36	7	0	4	1	6	60	115	108	50	11	398
Vylkove	18	23	10	2	0	0	0	9	48	69	25	17	203
Sector		76	26	2	4	1	17	135	268	280	119	37	965

Critical stations of the year

Critical stations of the year
Station	countries	days below LDC	station-days with data	%
Baja	Hungary	3902	45599	9%
Duna Mohács	Hungary	3725	45865	8%
Paks	Hungary	2700	45876	6%
Budapest	Hungary	2657	45958	6%
Veliko Gradište	Serbia	2619	8337	31%

The daily series uses the first reading of each day.