The Ulma (russian: Ульма) is a river in
Mazanovsky District,
Amur Oblast,
Russia. It is the longest tributary of the
Selemdzha, with a length of
[ and with the fourth in drainage basin area, after the Orlovka and Byssa.]
History
Pottery fragments belonging to the Paleolithic
The Paleolithic or Palaeolithic (), also called the Old Stone Age (from Greek: παλαιός ''palaios'', "old" and λίθος ''lithos'', "stone"), is a period in human prehistory that is distinguished by the original development of stone too ...
Selemdzha culture (SLM) were found at the archaeological site Ust-Ulma-1 by the river. Organic content in a potsherd found at the site was dated back to between 8,900 and 12,590 years ago.
In 1981, the Ulma Zakaznik (Ульминский заказник), a protected area
Protected areas or conservation areas are locations which receive protection because of their recognized natural, ecological or cultural values. There are several kinds of protected areas, which vary by level of protection depending on the ena ...
of , was established in the middle basin of the river.Нижне-Норский - Дирекция ООПТ Амурской области
/ref>
Course
The Ulma is a left tributary of the Selemdzha. It has its origin at the confluence of the Right Ulma and Left Ulma (Bordak) in the western slopes of the Turan Range. The river flows fast in a roughly southwestern direction in its upper reaches. In its middle and lower course it first flows northwestwards and then westwards, meandering across a very marshy floodplain dotted with small lakes and oxbows.[Topographic map M-52; M 1: 1,000,00](_blank)
/ref> Finally it meets the left bank of the Selemdzha from its mouth in the Zeya, downstream from Uglovoye
Uglovoye (russian: Угловое) is a rural locality (a selo) and the administrative center of Uglovskiy Selsoviet of Mazanovsky District, Amur Oblast, Russia. The population was 530 as of 2018. There are 24 streets.
Geography
Uglovoye is lo ...
and upstream from the village of Bogoslovka.Google Earth
Google Earth is a computer program that renders a 3D computer graphics, 3D representation of Earth based primarily on satellite imagery. The program maps the Earth by superimposition, superimposing satellite images, aerial photography, and geog ...
[Water of Russia - Ulma]
/ref>
The Ulma river basin is mainly rain-fed and the spring-summer period accounts for up to 90% of the annual water runoff. Floods
A flood is an overflow of water ( or rarely other fluids) that submerges land that is usually dry. In the sense of "flowing water", the word may also be applied to the inflow of the tide. Floods are an area of study of the discipline hydrolog ...
are frequent not only in spring, but also in the summer and autumn and are often quite massive. The river freezes in late October to early November and stays under ice until late April to early May.[
All the tributaries of the Ulma are quite short, except for the long Kera from the right.][
]
Fauna
Taimen, lenok, grayling
Grayling or Greyling may refer to:
Animals Fish
* Grayling, generically, any fish of the genus ''Thymallus'' in the family Salmonidae
** European grayling (''Thymallus thymallus''), the European species of the genus ''Thymallus''
** Arctic grayli ...
, crucian carp, pike, burbot and Amur catfish are some of the common fish species in the waters of the Ulma river.[
]
See also
* List of rivers of Russia
References
External links
Река Ульма 2006 год, Амурская область, рыбалкаСплав по реке Ульма
{{Portal bar, Russia
Rivers of Amur Oblast
Drainage basins of the Sea of Okhotsk