ASSESSMENT OF THE HYDROLOGICAL REGIME OF THE SANGZOR RIVER

Jasurjon Khamroqulov; Sokhiba Mamatkulova; Laylo Makhmudova

Authors

Jasurjon Khamroqulov National Research University “Tashkent Institute of Irrigation and Agricultural Mechanization Engineers”
Sokhiba Mamatkulova National Research University “Tashkent Institute of Irrigation and Agricultural Mechanization Engineers”
Laylo Makhmudova National Research University “Tashkent Institute of Irrigation and Agricultural Mechanization Engineers”

Keywords:

Sangzor River, hydrological regime, water discharge, flow variability, Gumbel distribution, return period, irrigation, water resource management.

Abstract

This study presents an assessment of the hydrological regime of the Sangzor River basin using a multidisciplinary methodological approach. The analysis is based on long-term hydrological observations (2000-2023) of water discharge, flow volume, and turbidity provided by the Uzbekistan Hydrometeorological Service (Uzhydromet), as well as design and operational data from the Jizzakh Reservoir (2005-2023). Hydrological calculations included the determination of average, maximum, and minimum water discharges, coefficients of variation (Cv) and skewness (Cs), and flow modulus (l/s·km²). Seasonal distribution of flow was evaluated using the Gumbel distribution law, and return periods of maximum discharge (1%, 5%, and 10%) were estimated through probabilistic analysis. The results provide a reliable scientific basis for effective water resource management, irrigation planning, and ecological monitoring in the Sangzor River basin.