EGU22-10927, updated on 10 Jan 2024
EGU General Assembly 2022
© Author(s) 2024. This work is distributed under
the Creative Commons Attribution 4.0 License.

Hydrological response to meteorological drought in Chirchik river basin of Western Tian-Shan

Gulomjon Umirzakov1,2, Renji Remesan3, Komiljon Rakhmonov1, Sanskriti Mujumdar4, and Nurmukhammad Omonov1
Gulomjon Umirzakov et al.
  • 1Department of Hydrometeorology, National University of Uzbekistan, Uzbekistan (
  • 2Hydrometeorological Research Institute, Uzhydromet, Uzbekistan
  • 3School of Water Resources, Indian Institute of Technology Kharagpur, India
  • 4Department of Civil Engineering, The Maharaja Sayajirao University of Baroda, India

This study investigated the link between meteorological and hydrological droughts in two rivers with and without glaciers in Сhirchik river basin of Western Tian Shan. Observed monthly hydrometeorological data was used to estimate Standardized Precipitation Indexes (SPI) and Standardized Streamflow Indexes (SSI) to analyze the hydrological response of snow-glacier fed Pskem and snow-rain fed Ugam rivers in the region. The Pearson correlation coefficient has been used to estimate statistical relations between SPI and SSI indices for the selected rivers. The SPI-SSI correlation coefficient has shown a positive trend with an increase in timescales, and it was more evident in indexes between the 6-month to 12-month  timescales in both rivers. The statistical relationships between the meteorological and hydrological drought indexes showed that the SPI-SSI relationship varies with river flow generation and its dynamics, and it was more in the Ugam River than the Pskem River. That indicates snow-dominated Ugam River is more prone to meteorological droughts, whereas the glaciers in the Pskem River basin were buffering hydrological drought and its frequency and severity. Obtained results allow better-informed forecasting of hydrological droughts in the river basin and, consequently, enable efficient water management in agricultural and hydropower sectors.

How to cite: Umirzakov, G., Remesan, R., Rakhmonov, K., Mujumdar, S., and Omonov, N.: Hydrological response to meteorological drought in Chirchik river basin of Western Tian-Shan, EGU General Assembly 2022, Vienna, Austria, 23–27 May 2022, EGU22-10927,, 2022.