Catastrophic Floods in the Angara River Basin in 2019: Modeling the Conditions of Formation and Water Regime of Rivers
https://doi.org/10.31857/S2587556621020102
Abstract
The main factors of extraordinary rainfall floods formation on the Angara River left tributaries in the summer of 2019, which caused catastrophic floods in the Irkutsk oblast, were investigated. On the basis of information modeling system, the core of which is a physically based model of runoff formation ECOMAG, a spatial distributed regional hydrological model was developed. The model performance was evaluated against the longterm (35 years) data of hydrometeorological observations in the five river basins of the region. It was found that the simulated stream flow hydrographs and the peak flow values fit satisfactorily (in terms of the assigned statistical criteria) to the corresponding observations. Based on the spatial modeling results, fields of the hydrological cycle characteristics (precipitation, snow water equivalent, soil moisture) in the upper Angara basin in the summer of 2019 were analyzed. It was shown that the main factors in the formation of catastrophic floods on the Iya River were extreme precipitation combined with small losses of runoff for infiltration into preliminary saturated soils. The simulated peak flow discharge on the river near city of Tulun exceeded the historical maximum by 40% and amounted to 5640 m3/s. The spatial and temporal peculiarities of the two flood waves formation on the studied Angara River left tributaries in 2019 were analyzed.
Supporting agencies: The information base for constructing a hydrological model was created within the state-ordered research theme no. 0147-201900003 of the Water Problems Institute of the Russian Academy of Sciences.
About the Authors
Yu. G. Motovilov
Water Problems Institute of the Russian Academy of Sciences,
Russian Federation
Russian Federation
Moscow.
A. N. Gelfan
Water Problems Institute of the Russian Academy of Sciences; Lomonosov Moscow State University, Faculty of Geography
Russian Federation
Russian Federation
Moscow.
V. O. Polyanin
Water Problems Institute of the Russian Academy of Sciences
Russian Federation
Russian Federation
Moscow.
References
1. Bednaruk S.E., Motovilov Yu.G. Technology of information support in the management of water reservoirs cascades. Gidrotekhnicheskoe Stroitel'stvo, 2017, no. 7, pp.22-35. (In Russ.).
2. Bulygina O.N., Veselov V.M., Razuvaev V.N., Aleksandrova T.M. Opisanie massiva srochnykh dannykh ob os-novnykh meteorologicheskikh parametrakh na stantsiyakh Rossii. Svidetel'stvo o gosudarstvennoi registratsii bazy dannykh № 2014620549 [Description of the Urgent Data on the Main Meteorological Parameters at Russian Stations. Certificate of State Registration of the Database no. 2014620549]. 2014. Available at: http://meteo.ru/data/163-basic-parameters#opisanie-massiva-dannyh (accessed: 20.01.2020).
3. Irkutskaya letopis' [Irkutsk Chronicle]. Tr. Vostochno-Sibirskogo otdela Russkogo geograficheskogo obshchestva [Proc. of the East Siberian Dep. of the Russ. Geogr. Soc.]. Irkutsk, 1914, no. 8. 418 p.
4. Makar'eva O.M. Results of flood modeling on the Iya River-Tulun. Nestandartnaya Gidrologiya, 2019. Available at: https://vk.com/@other_hydrology-rezultaty-modelirovaniya-pavodka-na-reke-iya-tulun (accessed: 20.01.2020). (In Russ.).
5. Misyurkeev Yu.A., Marasanov M.G., Kichigina N.V. Flooding risk of the Irkutsk oblast and analysis of damages from them. In Vodnye resursy baikal'skogo regiona: problemy formirovaniya i ispol'zovaniya na rubezhe tysyacheletii. Mat. nauchn.-prakt. konf. [Water Resources of the Baikal Region: Problems of Formation and Use at the Turn of the Millennium. Mat. Sci.-Appl. Conf.]. Timofeev S.S., Ed. Irkutsk: Irkutsk. Gos. Univ., 1998, pp.153-156. (In Russ).
6. Motovilov Yu.G., GelfanA.N. Modeli formirovaniya stoka v zadachakh gidrologii rechnykh basseinov [Runoff Generation Models in River Basin Hydrology]. Moscow: RAN, 2018. 300 p.
7. Motovilov Y., Gottschalk L., Engeland L., Rodhe A. Validation of a distributed hydrological model against spatial observation. Agric. Forest Meteor., 1999, vols. 9899, pp. 257-277.
8. Razumov V.V., Razumova N.V., Pchelkin V.I. The magnitude and the risk of flooding in the Siberian region of Russia. Nauka. Innovatsii. Tekhnologii, 2015, no. 4, pp. 103-144. (In Russ.).
9. Resursy poverkhnostnykh vod SSSR [Surface Water Resources of the USSR]. Leningrad: Gidrometeoizdat Publ., 1972, vol. 16, no. 2. 400 p.
10. Seliverstov Yu.G. Sayany i gory Tuvy [Sayan and Mountains of Tuva]. 2003. Available at: http://www.geogr.msu.ru/avalanche/regions/als/sa.doc/sa.htm (accessed: 20.01.2020).
11. Shalikovskii A.V., Lepikhin A.P., Tiunov A.A., Kurganovich K.A., Morozov M.G. The 2019 floods in Irkutsk oblast. Vodnoe Khozyaistvo Rossii, 2019, no. 6, pp.48-65. (In Russ.).
12. Zadonina N.V., Levi K.G. Khronologiya prirodnykh i sotsial'nykh fenomenov v Sibiri i Mongolii [Chronology of Natural and Social Phenomena in Siberia and Mongolia]. Irkutsk: Irkutsk. Gos. Univ., 2008. 759 p.
13. Zaikov B.D. Vysokie polovod'ya i pavodki na rekakh SSSR za istoricheskoe vremya [High Rainfall and Snowmelt Floods on the Rivers of the USSR During Historical Time]. Leningrad: Gidrometeoizdat Publ., 1954. 135 p.
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For citations:
Motovilov Yu.G., Gelfan A.N., Polyanin V.O. Catastrophic Floods in the Angara River Basin in 2019: Modeling the Conditions of Formation and Water Regime of Rivers. Izvestiya Rossiiskoi Akademii Nauk. Seriya Geograficheskaya. 2021;85(2):302-316. (In Russ.) https://doi.org/10.31857/S2587556621020102
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