River
Aa River
89 km from source to mouth · France.
FranceFlows into North Sea
In numbers
Length
89km
Average flow
10m³/s
Basin
1,215km²
Drop
76m
from 75 m to -1 m
Country
1
The journey
From source to mouth
89 km of river and 13 stops on the way: 11 towns and cities on its banks, dams, bridges and the tributaries that feed it.
- 0 kmSourceat 75 m
- 29 kmLumbres4,097 people
- 35 kmEsquerdes1,506 people
- 38 kmHallines1,436 people
- 39 kmWizernes3,544 people
- 40 kmHelfaut1,748 people
- 44 kmBlendecques5,331 people
- 47 kmArques9,551 people
- 63 kmWatten2,564 people
- 64 kmHaute-Colme Viaduct
- 79 kmSaint-Folquin2,126 people
- 84 kmGravelines13,137 people
- 87 kmGrand-Fort-Philippe6,188 people
- 89 kmHemtributary
- 89 kmNorth Seaat -1 m
Water level along the river (RiverATLAS; the height is exaggerated). Towns: GeoNames and Wikidata; bridges, dams and tributaries: Wikidata.
River in France
At the mouth it carries 10 m³/s on average: an Olympic pool every 250 seconds. It drops from 75 m to -1 m, 0.9 m per kilometre on average. Its basin covers 1,215 km², about the size of MQ.
Where to start
- GravelinesLargest city on its banks · 13,137 people
- Ostend-Bruges International Airport (OST)Nearest airport with scheduled flights, 57 km from the cityCar hire at LIL airport (Lesquin)Discover Cars · Affiliate link↗
- On the water20 ferry piers, marinas, boat rentals and boat ramps along the river (OpenStreetMap)
Plan the trip
Plan the trip: boat trips, a bed by the river, a car
Some links above are affiliate links: if you book through them we may earn a commission, at no extra cost to you. It never changes what the data on this page says.
Along the river
Aa River: what you find on the way
- 6WeirsBarrage au Haut Pont and 5 more
- 18LocksCanal de Neufossé, L'Aa Canalisée, Canal de la Haute Colme and 15 more
- 5Boat rampsDébarcadère bateau and 4 more
- 9Ferry piersEmbarcadère, Petit-Fort-Philippe, Grand-Fort-Philippe and 6 more
- 4MarinasPort Fluvial, Port de Gravelines, Port de plaisance de Gravelines and 1 more
- 2River beachesPlage de Gravelines, Plage de Grand-Fort-Philippe
From OpenStreetMap, within 1.2 km of the river. Not mapped is not the same as not there.
Cross-checked with our atlases
Aa River in our other atlases
What our sister atlases know about the waterfalls on this river, the lakes it flows through, the beaches at its mouth, the mountains where it rises and the islands off its mouth.
1beach at the mouth or on the banksCoastya
2mountains at the sourcePeakyas
Beaches (1)
At the mouth (25 km) and on the banks, by Coastya
- Plage de Petit-Fort-Philippekm 7517.9°C
Mountains at the source (2)
Within 15 km of the source, by Peakyas
- Mont Hulin8.6 km away203m
- Relais de Bullescamps12 km away211m
From space
The source and the mouth, seen from orbit
Sentinel-2 cloudless 2016 by EOX IT Services GmbH (contains modified Copernicus Sentinel data 2016), CC BY 4.0. The glowing line is the river as drawn by RiverATLAS.
Photos
Aa River in pictures
Tributaries
Where it flows, and what flows into it
Tributaries (2)
Also: Hem, Bléquin
Nearby
Rivers nearby
Belgium78 km15 m³/s46 km awayRiver Thames
United Kingdom334 km66 m³/s134 km awayRiver SommeFrance245 km35 m³/s98 km awayRhine
The Netherlands1,233 km2,200 m³/s176 km awayLysBelgium202 km22 m³/s115 km awaySeineFrance777 km500 m³/s204 km awayMeuseThe Netherlands950 km230 m³/s195 km awayDenderBelgium65 km8.8 m³/s139 km awayWhere these numbers come from
| Name, length, places | Wikidata (Q300661) · CC0 |
|---|---|
| Course, profile, basin | RiverATLAS v1.0 (HydroATLAS, Linke et al. 2019) · CC BY 4.0 — followed from the source to the mouth given by Wikidata |
| Flow | WaterGAP (RiverATLAS), 1971–2000 · CC BY 4.0 |
| Climate along the river | WorldClim (RiverATLAS), 1970–2000 · CC BY 4.0 |
| Towns, bridges, dams | Wikidata · CC0; GeoNames · CC BY 4.0 |
| Along the river | © OpenStreetMap contributors · ODbL |
| Images | EOX Sentinel-2 cloudless 2016 · CC BY 4.0; Wikimedia Commons |
| Our other atlases | Coastya, Peakyas — Wikidata · CC0; © OpenStreetMap contributors · ODbL; GeoNames · CC BY 4.0; HydroLAKES · CC BY 4.0; NOAA OISST |
Every source and licence is on the data sources page.
The family
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