Dukentsay , Dukent-sai [1] , Dukantsay [2] ( Uzbek. Dukentsoy, Dukentsoy ) is a mountain river (sai [lom 1] ) in the Akhangaran district of the Tashkent region , the right tributary of the Akhangaran river. In the upper reaches (up to the confluence of the Chilten tributary) it is called Alatanga ( Uzbek Olatangi ) [3] .
| Dukentsay | |
|---|---|
| uzb Dukentsoy | |
 Dukentsay (foreground) with tributary Kattasay , near the city of Yangiabad | |
| Characteristic | |
| Length | 33 km |
| Pool | 242 km² |
| Water flow | 3.41 m³ / s |
| Watercourse | |
| Source | |
| • Location | Chatkal Range , near the Muzbel Pass |
| • Height | about 2800 m |
| • Coordinates | |
| Mouth | Ahangaran |
| • Location | Angren city |
| • Height | about 880 m |
| • Coordinates | |
| Location | |
| Water system | Akhangaran → Syrdarya → Small Aral Sea → Large Aral Sea |
| A country |
|
| Region | Tashkent region |
| Area | Akhangaran district |
Content
Name etymology
The historian Yu. F. Buryakov points out that in folk etymology various translations of the toponym are given: “two cities” that allegedly existed along the banks of the river ( Dukent ), or “two mines” ( Dukan ) - but both versions go back to the legends of ancient activities people in the region [4] .
General Description
Dukentsaya is 33 km long; the basin area according to the National Encyclopedia of Uzbekistan is 242 km², the average catchment height above the village of Dukant (201 km² of the catchment area) is 2,210 m [5] . Sai power snow, rain and spring. In the "National Encyclopedia of Uzbekistan" for the mean annual water consumption the value of 3.41 m³ / s is indicated. V.E. Chub reports that the average annual discharge of water measured near the village of Dukant is 3.58 m³ / s, the annual flow volume is 113 million m³, the average flow module is 17.8 l / s · km² , the runoff layer is 562 cm / year, the coefficient of variability of runoff (over the 29-year observation period in 1971-1999) was 0.379 [5] . The river is deep from March to June, which account for 70-80% of the annual flow. In the spring, mudslides are usual in the riverbed when the water flow reaches 56 m³ / s. In the second half of summer and autumn, water consumption drops to 0.30 m³ / s. The average turbidity of water is 120 mg / l. In winter, Dukentsay often freezes [3] .
River
Dukentsay (Alatanga) forms on the southern slope of the Chatkal range , southwest of the Muzbel Pass, collecting more than 60 sources of water [3] [6] . In the upper reaches it flows to the south-west, after the confluence of a large tributary, the Musbel acquires a general southern direction of the current, which retains up to the mouth, only bending around a height of 2221.0.
From the confluence of the Alatanga and Chilten rivers to the city of Yangiabad, the slopes of the valley descend into the riverbed .
At the confluence with Kattasai on Dukentsay stands the city of Yangiabad . The city of Yangiabad floodplain width is 20-25 meters. The banks rise 0.5-1.5 meters above the floodplain . In the lower reaches, it passes along the eastern outskirts of the city of Angren ( Yangiabad-2 (Dukent) , Apartak districts ), acquiring here a certain inclination to the east and in some places breaking up into separate branches. An artificial dam was laid along the outskirts of the village of Dukent . It crosses the Tashkent -Angren railway line not far from the final station [6] and flows right into the channeled Akhangaran (almost simultaneously with the left tributary Nishbash ) at an altitude of about 880 m [7] . Dukentsay and Karabau are the last tributaries of the Akhangaran, whose waters directly reach it throughout the year, the underlying tributaries are currently fully understood in the cones [8] , or have a drying area in the lower reaches [9] .
Dukents tributaries
The largest left tributary of the Dukentsaya is the Kattasai (left) [10] , the extended tributary flowing into the left is also the Chilten . In the upper reaches of the Alatangu the tributary Muzbel flows to the right [6] .
Ecological state
In 2002, the Angren tank farm was built in the Dukentsaya fan . Constant pollution of groundwater with oil products, from gaseous to heavy fractions has been observed [11] .
Archaeological sites and finds
On the right bank of Dukentsaya, in the village of Dukent (in the territory of Angren), a settlement of the same name was located, which is identified with the medieval Dakhket . Being a modest town in the mountains, Dahket, at the same time, was settled down almost continuously from the 10th to the 19th centuries, not excluding even the period after the Mongol conquest of Central Asia . The reason was probably a favorable location in the valley of a mountain river, inconvenient for attack and rich in minerals. The development of copper and polymetallic mines in the upper reaches of Dukentsaya has a long history [12] .
A unique find was made in the ancient development: birch bark letters of the end of the XV - beginning of the XVI century. Letters are vertical cursive; made with mascara applied with a sharp stick. The creation of the letters is attributed to the secret Buddhist sect among the Mongols [12] [13] .
In the region, treasures from coins were found three times. In 1952, 1,499 silver coins minted at 15 mints from 1273 to 1311 were found on the right bank of the Saya, 15 kilometers from Angren; in 1961, in Dukent - more than 70 silver and copper coins of 1533–1549, in 1965 - a treasure collected by local residents from 329 silver coins of the XIV-XV centuries [12] .
Notes
- Comments
- ↑ Sayas in Central Asia refer to ravines with permanent or temporary watercourses, as well as watercourses themselves (in particular, relatively small rivers experiencing sharp seasonal fluctuations in full-flow or completely drying up).
- Sources
- ↑ Yafasov A., Satiboldiev T. Radon - a problem of ecology or health care? // Environmental security and civil initiative. - Center "Armon", 2003. - № 2 . - p . 12 .
- ↑ Chub, 2007 , p. 88–89.
- ↑ 1 2 3 Dukentsoy - National Encyclopedia of Uzbekistan . - Tashkent, 2000-2005. ( uz. )
- ↑ Buryakov, 1975 , p. 153.
- ↑ 1 2 Chub, 2007 , p. 89
- ↑ 1 2 3 Map Sheet K-42-105 Angren . Scale: 1: 100,000. Indicate the date of issue / state of the terrain .
- ↑ Map Sheet K-42-117 Asht . Scale: 1: 100,000. Indicate the date of issue / state of the terrain .
- ↑ Chub, 2007 , p. 86
- ↑ Map sheet K-42-116 Almalyk . Scale: 1: 100,000. Indicate the date of issue / state of the terrain .
- ↑ Kattasoy - National Encyclopedia of Uzbekistan . - Tashkent, 2000-2005. ( uz. )
- ↑ Mingboev, K. R., Integrating Methods for Estimating Ground Waters with Petroleum Products // Abstract of a dissertation for the degree of Candidate of Geological and Mineralogical Sciences. - Tashkent, 2012. p. 8
- ↑ 1 2 3 Historic Monuments in the Ugam-Chatkal National Park
- ↑ Buryakov, 1975 , p. 156–157.
Literature
- Dukentsoy - National Encyclopedia of Uzbekistan . - Tashkent, 2000-2005. ( uz. )
- Chub V.E. Climate change and its impact on hydrometeorological processes, agroclimatic and water resources of the Republic of Uzbekistan. - Tashkent: "VORIS NASHRIYOT" MChJ, 2007. - 133 p. - ISBN 978-9943-304-23-9 .
- Yu. F. Buryakov. Historical topography of the Tashkent oasis (Historical and archaeological essay by Chach and Ilak). - Tashkent: Publishing House "Fan" of UzSSR, 1975. - 204 p. - 800 copies