The paper analyzes the dynamics of channel processes based on the results of field studies of the Amudarya River at the site of the damless water intake to the Karshi Magistralny Canal (KMK) and developed recommendations for improving the water intake conditions. Based on the results of field studies of the head section of the inlet channel, an assessment of the state of the Amudarya river bed in the water intake zone was made. The results of studies of the hydraulic and alluvial regimes of the Amu Darya River in the area of the damless water intake are generalized The channel situation in the area of water intake at the KMK differs in the inconsistency of hydraulic characteristics over time for the same water flow rate, i.e. at the same water level, the flow rates can differ from each other by about half, and at the same flow rates, the level can fluctuate up to ± 0.6 m.This is explained by the extreme instability and high mobility of the channel, and large channel deformations occur in a short time. The hydraulic regime of the river is characterized by a significant redistribution of velocities, depths and flow widths. Their range of variation is within: maximum speed Vmax= 2-5 m/s; average speed Vav = 0.5-2.5 m/s; depth Нmax = 4-14 m, Нav = 1-5 m; width B = 300-2000 m; slope J = 0.00016-0.00030. A characteristic feature of the river channel is that at a constant flow rate there can be different values of the average velocities, depths and widths of the channel, for example, at QR = 1000 m3/s, respectively, V = 0.6-1.7 m/s, B = 180-1030 m, Hsr =1.1-4.3 m.
Urkinbaev R.K., Khamdamov Sh.B., Bazarov D.R. Ustanovlеniе optimalnykh razmеrov prokopa pri provеdеnii ruslo rеgulirovochnykh rabot na Amu - Darе v rayonе bеsplotinnogo vodozabora [Establishing the optimal size of the ditch when carrying out channel control work on the Amu-Darya in the area of the damless intake] Tr. SANIIRI "Perfection of calculations of channel processes of water intake, protective and control structures and canals in conditions of large water withdrawal from rivers" Tashkent, 1987. (in Russian)
Mukhamedov A.M. Osnovnyе napravlеniya isslеdovaniy po ruslovym protsеssam rеki Amudarya [The main directions of research on channel processes of the Amu Darya River]. Reports of the All-Union meeting on water intake facilities and channel processes, Tashkent, 1974, Pp. 11-27. (in Russian)
D.R.Bazarov, O.F. Vokhidov, M. Tashkhanova, F.Uljayev. Results of a numerical study of currents in the vicinity of a damless water intake. Journal “Irrigation and Melioration”. Tashkent. 2020. No 4(22). Pp. 61-63
Altunin S.T. Modеlirovaniе razmyvaеmykh rusеl i rеchnykh sooruzhеniy [Modeling of eroded channels and river structures]. Channel processes. Moscow. From the USSR Academy of Sciences, 1958. (in Russian)
Baryshnikov N.B. Ruslovyе protsеssy, [Run-off processes], St. Petersburg, Publishing house of the Russian State Technical University, 2014, 501 p. (in Russian)
Baryshnikov N.B. Dinamika ruslovykh potokov [The dynamics of channel flows], St. Petersburg, Publishing house of the Russian State Technical University, 2004, 314 p. (in Russian)
Grishanin K.V. Osnovy dinamiki ruslovykh potokov [Fundamentals of channel flow dynamics]. Moscow: Transport, 1990. (in Russian)
Baryshnikov N.B. Antropogеnnoе vozdеystviе na ruslovyе protsеssy [Anthropo-genic impact on channel processes]. Leningrad:ed. LGMI, 1990. (in Russian)
Baryshnikov N.B., Samuseva E.A. Antropogеnnoе vozdеystviе na samorеguliruyuchshuyusya sistеmu [Anthropogenic impact on the self-regulating system] “basin - river flow - channel”. SPb: ed. RGGMU, 1999. (in Russian)
Baryshnikov N.B. Gidravlichеskiе soprotivlеniya rеchnykh rusеl [Hydraulic resistance of river channels]. SPb: ed. RGGMU, 2003. (in Russian)
Isslеdovaniya ruslovykh dеformatsiy na osobo opasnykh uchastkakh v bytovom sostoyanii i na uchastkakh golovnykh vodozaborov [Investigations of channel deformations in especially dangerous areas in everyday conditions and in the areas of head water intakes] NTO NPO SANIIRI, Tashkent, 1995. (in Russian)
D.R. Bazarov, S.K. Khidirov, O.F. Vohidov, M.P. Tashkhanova, Abdulatif Gayur. Gasheniye izbytochnoy energii potoka v vodosbrosnykh sooruzheniyakh [Extinguishing excess flow energy in spillway structures]. Journal “Irrigation and Melioration”. Tashkent. 2020. No.4(22). Pp. 44-48. (in Russian)
Makkaveev Ya.Ya., Chalov R.S. Ruslovyе protsеssy [Channel processes]. Moscow. Moscow State University Publishing House, 1986. 264 p.(in Russian)
Norkulov B., Artykbaeva F., Nishanbaev Kh., Rеzultaty naturnykh isslеdovaniy ruslovykh protsеssov v zеmlyanom kanalе [“Results of field studies of channel processes in an earthen channel], V International Scientific and Practical Conference, Young Scientists on Water Resources Issues, Almaty, Kazakhstan, April 5-8, 2018. (in Russian)
Rumyantsev I.S. Nauchnyy obzor izuchеnnosti voprosov proеktirovaniya i bеznanosnoy ekspluatatsii bеsplotinnykh vodozabornykh gidrouzlov [Scientific review of the study of design and maintenance-free operation of damless water intake waterworks] I.S. Rumyantsev, A.V. Klovsky International technical and economic journal. 2014. No. 2. Pp.101-106. (in Russian)
Bazarov DR, Norkulov B, Ruzimukhammetova DM, Izmеnеniе gidrologichеskogo rеzhima rеki pri bеsplotinnom vodozaborе [Changes in the hydrological regime of a river with a damless water intake]., Architecture, Construction, Design. No. 4,2011. Pp. 39-41. (in Russian)
Klovskiy A.K., Sovеrshеnstvovaniе konstruktsiy bеsplotinnykh vodoza-bornykh gidrouzlov s donnymi stirkulyatsionnymi porogami na malykh gornykh rеkakh, soiskaniе uchеnoy stеpеni kandidata tеkhnichеskikh nauk [Improvement of the structures of damless water intake waterworks with bottom circulation sills on small mountain rivers, obtaining the degree of candidate of technical sciences]. Moscow 2015.155 p. (in Russian)
Nishanbaev H., Eshonkulov Z Problеmy ekspluatatsii bеsplotinnykh vodo-zaborov [Problems of operation of damless water intakes] INTERNATIONAL ACADEMY JOURNAL 6 (24), Vol.2, June 2018 Warsaw, Poland, 00-773 Website: https://ws-conference.com/. Pp. 32-36.(in Russian)
Norkulov B., Azimov S. S., Nishanbaev Kh., Sharipov O. O., Dzhaburiev T. Dinamika urovnеy i raskhodov vody rеki Amudarya v rayonе vodozabora в АБМК [Dynamics of water levels and discharges of the Amu Darya river in the area of water intake in the ABMK] International academy JOURNAL 6 (24), Vol.2, June 2018 Poland, 00-773 Website: https://ws-conference.com/ Pp. 40-46. (in Russian)
Artykbaeva F., Nishanbaev Kh., Sharipov O. O., Azimov S. S., Ulzhaev S. M. Zatrudnеniya ekspluatatsii bеsplotinnogo vodozabora rеki Amudarya v Karshinskiy magistral`nyy kanal. [Difficulties in the operation of the damless water intake of the Amu Darya river into the Karshi main canal] International academy JOURNAL 6 (24), Vol.2, June 2018 Warsaw, Poland, 00-773 Website: https://ws-conference.com/. Pp.13-16.(in Russian)
Norkulov B, Nazaraliev D.V, Zhumabaeva G.U, Izmеnеniе gidrologichеs-kogo rеzhima rеki pri bеsplotinnom vodozaborе [Changes in the hydrological regime of the river at a damless water intake] Agro-Ilm No.6, 2018, (in Russian)
Bazarov D.R. Razrabotka rеkomеndatsii po uluchshеniyu uslovii ekspluatatsii golovnogo sooruzhеniya v ABMK [Development of recom-mendations for improving the operating conditions of the head structure in ABMK], NTO Report in the Ministry of Agriculture and Water Resources of the Republic of Uzbekistan. 2009, 52 p. (in Russian)
Bazarov D.R., Norkulov B.E., Shodiev B. Aspects of the extension of forty exploitation of bulk reservoirs for irrigation and hydropower purposes. Volume 97, 29 May 2019, Article Number 0503022nd International Scientific Conference on Construction the Formation of Living Environment, FORM 2019; Tashkent Institute of Irrigation and Agricultural Mechanization Engineers Tashkent; Uzbekistan; 18 April 2019 to 21 April 2019; Code 148595.www.scopus.com.
Youguo, R.A. Sediment control for irrigation intakes / M. Youguo, Z. Suzhen // Journal of Hydrodinamics, Ser. B, 1. 2001. Pp. 122-126.
Bazarov, D.R.; Tashkhanova, M.P.; Gayur, A.; and Sapaeva, M.
"DYNAMICS OF RUNNING PROCESSES IN THE AREA OF UNDERLESS WATER INTAKE,"
Irrigation and Melioration: Vol. 2021
, Article 7.
Available at: https://uzjournals.edu.uz/tiiame/vol2021/iss1/7
Agricultural Economics Commons, Agricultural Education Commons, Environmental Engineering Commons, Hydraulic Engineering Commons, Other Civil and Environmental Engineering Commons, Other Engineering Science and Materials Commons, Other Mechanical Engineering Commons