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.

Irrigation season 2018: Germany spent the longest below LDC, 39 % of days

Irrigation season (April–September)

Station-days below LDC in the irrigation season, by country and year, against the average of the other years; the longest uninterrupted spells below LDC.

2018Meanbelow LDC in season

Irrigation season (April–September) 2018
countries	station-days in season	below LDC in season	%	vs. average
Germany	1,647	641	39%	+26 pp
Austria	1,647	67	4%	+3 pp
Slovakia	549	63	11%	+9 pp
Hungary	3,660	650	18%	+16 pp
Croatia	831	83	10%	+9 pp
Serbia	2,196	363	17%	+6 pp
Romania	2,304	195	8%	-5 pp
Bulgaria	1,098	170	15%	+10 pp
Ukraine	549	15	3%	-6 pp

Longest spells below LDC

Uninterrupted periods of at least 5 days below LDC, by station.

Longest spells below LDC
Station	countries	From	To	days
Oberndorf	Germany	2018-07-10	2018-09-02	55
Smederevo	Serbia	2018-09-14	2018-10-31	48
Pančevo	Serbia	2018-09-15	2018-10-31	47
Novo Selo	Bulgaria	2018-09-17	2018-11-02	47
Calafat	Romania	2018-09-18	2018-11-03	47
Bechet	Romania	2018-09-19	2018-11-04	47
Oryahovo	Bulgaria	2018-09-19	2018-11-04	47
Silistra	Bulgaria	2018-09-22	2018-11-07	47
Lom	Bulgaria	2018-09-19	2018-11-03	46
Corabia	Romania	2018-09-20	2018-11-04	46

The daily series uses the first reading of each day.