Crossing water obstacles represents one of the most complex operational tasks in military and civilian protection and rescue operations. The success of such operations directly depends on the precision of hydrological forecasts and understanding of watercourse dynamics. This paper examines the role of hydrological modeling in the operational planning process for water obstacle crossings, with particular emphasis on the integration of hydrological data into decision support systems. The research was conducted using a combination of quantitative and qualitative methods, including analysis of hydrological models, crossing scenario simulations, and evaluation of operational procedures under different hydrological conditions. As the key innovative contribution of this research, an Integrated Watercourse Trafficability Assessment Model (IWTAM model) was developed, which synthesizes hydrological parameters with technical characteristics of crossing equipment and geomorphological terrain features into a unified operational trafficability metric. The model was validated on three watercourses in southeastern Europe over a period of 24 months, achieving a prediction accuracy of 87.3% for determining optimal time windows for crossing. Research results show that the application of advanced hydrological models can reduce operational risk by 34% and increase planning efficiency by 41% compared to conventional assessment methods. The paper concludes that the integration of hydrological modeling into operational planning is essential for modern military and civilian operations, and proposes a methodological framework for implementing the IWTAM model into existing decision support systems