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Kyushu University (2017)

Construction of an Integrated Hydrological Model for Sustainable Water Resources Management in the Chirchik River Basin, Uzbekistan

Usmanov Saidislomkhon

Titre : Construction of an Integrated Hydrological Model for Sustainable Water Resources Management in the Chirchik River Basin, Uzbekistan

Auteur : Usmanov Saidislomkhon

Université de soutenance : Kyushu University

Grade : Doctor of Engineering 2017

Résumé partiel
The Chirchik River Basin is considered one of the country’s largest and most important basins. It is located in the northeastern province of Tashkent, Uzbekistan. The economy of the basin relies heavily on agricultural production ; employing most of the region’s population and consuming the lionshare of available water through irrigation practices. Unsurprising, the Chirchik River basin is facing several potentially severe water related problems, including increased aridity and, land salinization, and declines in agricultural production. Continuously increasing the groundwater level and the inefficient use of river waters are expected to further compound these problems, and their effects. Poor management of water resources due to limited knowledge of hydrological processes has been identified as a root cause of water resource issues in the basin. Efficient management requires accurate estimation and modeling of water balance and main hydrological parameters. In order to achieve reliable and accurate results, irrigation processes, which play an important role in the hydrological cycle, should be included in the model to account for the contribution of irrigation water to other hydrological parameters. In this concern, an integrated hydrological model was developed to study hydrological processes in the basin territory through detailed water balance estimation. Previously, the empirical coefficient (0.0023) of Hargreaves model (HM) was modified under local climatic conditions of Tashkent province using standard Penman Monteih FAO 56 (FAO-56 PM) model estimates for every month of the years. Then the suitable interpolation methods were determined among deterministic, geostatistical and regression methods to spatial modeling of ETo over Tashkent province using modified HM estimates. Using the estimated reference evapotranspiration, hydrological parameters were estimated of Chirchik River Basin using the integrated hydrological model. The groundwater and surface water interaction and spatial variability of hydrological parameters are also analyzed.

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