Achieving sufficient water supplies for multiple uses in the watershed is a major public policy issue. Understanding the current ecohydrologic processes is essential to assess potential impacts on hydrologic regimes. The Tuul River (TR) watershed faces a cold, continental climate with water supply variability. This study aims to simulate watershed processes in the TR watershed and subbasins and analyze the influences of those processes on water resources. Watershed hydrologic processes and their impact on the water resources are modeled using the Soil Water Assessment Tool (SWAT). Calibration and validation were conducted using R², PBIAS, RSR, and NSE to assess the effectiveness of the SWAT model to replicate annual, monthly streamflow values. The spatial and temporal variations in watershed processes are critical for water resource decisions. With increasing uncertainty and scarcity in water resources, simulation modeling is a valuable tool in watershed management in regions with water scarcity.

实现流域多种用途的充足供水是一个主要的公共政策问题。了解当前的生态水文过程对于评估对水文状况的潜在影响至关重要。图尔河 (TR) 流域面临寒冷的大陆性气候，供水多变。本研究旨在模拟 TR 流域和子流域的流域过程，并分析这些过程对水资源的影响。流域水文过程及其对水资源的影响使用土壤水评估工具 (SWAT) 进行建模。使用R ²进行校准和验证、PBIAS、RSR 和 NSE 来评估 SWAT 模型复制年、月流量值的有效性。流域过程的空间和时间变化对水资源决策至关重要。随着水资源不确定性和稀缺性的增加，模拟建模是水资源短缺地区流域管理的重要工具。