River
Irgiz River
593 km from source to mouth · Kazakhstan.
KazakhstanFlows into Turgai River
In numbers
Length
593km
Average flow
8.0m³/s
Basin
31,600km²
Drop
251m
from 321 m to 70 m
Country
1
The journey
From source to mouth
593 km of river and 2 stops on the way: 1 towns and cities on its banks, dams, bridges and the tributaries that feed it.
- 0 kmSourceat 321 m
- 353 kmShet-Yrghyztributary
- 474 kmYrghyz4,673 people
- 593 kmTurgai Riverat 70 m
Water level along the river (RiverATLAS; the height is exaggerated). Towns: GeoNames and Wikidata; bridges, dams and tributaries: Wikidata.
River in Kazakhstan
At the mouth it carries 8.0 m³/s on average: an Olympic pool every 312 seconds. It drops from 321 m to 70 m, 0.4 m per kilometre on average. Its basin covers 31,600 km², about the size of BE. 32,000 people live in it. Highest water, with the snowmelt: April; lowest: from December to March. No large dam holds it back: it is one of the world's free-flowing rivers.
Where to start
- YrghyzLargest city on its banks · 4,673 people
- From May to SeptemberThe best months to visit
Irgiz River, month by month
Highest water: April
Lowest water: from December to March. Freezing months (average below −4 °C): from December to March. Melting snow makes up much of its water. Best months to visit: from May to September.
From about 0.8 m³/s in the lowest month to 330 m³/s in the highest. An estimate: the monthly flow is modelled from the lowest and highest months of WaterGAP (RiverATLAS, 1971–2000) and the rain and snow along the river (WorldClim). Dams change the real rhythm. The chip is the average air temperature; below it, the month's rain.
Plan the trip
Plan the trip: boat trips, a bed by the river, a car
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The basin
Irgiz River: the basin in numbers
29,319 km² of land send their water to this river. This is what lives on it.
- 32,000people live in the basin
- 1/km²people per km²
- 254maverage altitude of the basin
- 237mmof rain a year (basin average)
- 4.3°Caverage air temperature
- 1%protected areas
- 0.1%covered by lakes
What covers the basin
- 2% Cropland
- 85% Pasture
RiverATLAS (HydroATLAS v1.0, CC BY 4.0): land cover, people, protected areas, glaciers and dams over the whole basin upstream of the mouth.
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.
Tributaries
Where it flows, and what flows into it
It flows into
Turgai RiverTributaries (1)
Also: Shet-Yrghyz
Where these numbers come from
| Name, length, places | Wikidata (Q938914) · 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 |
Every source and licence is on the data sources page.
The family
Do you prefer beaches, lakes, mountains, waterfalls, islands, rivers or canyons?
Same idea, other landscapes: field atlases built on open data, month by month, in seven languages.