This section of research delves into the profound and multifaceted impacts of climate change on hydrological cycles, ecological systems, and human societies, with a focus on understanding and mitigating these effects through innovative research. The collection of studies spans a broad array of topics, from the assessment of climate change on floodplain mapping and hydrologic ecotones to the sophisticated modeling of hydrological responses to future climate scenarios across various geographic regions. Key research in this section includes the use of advanced hydrologic modeling techniques to predict changes in floodplain dynamics under various climate change scenarios, employing both historical data and future projections. Another significant area of focus is the statistical analysis of watershed responses to climatic changes across the United States, identifying trends such as alterations in streamflow patterns and the energy-water balance. These analyses help in understanding regional differences in hydrological impacts due to climate change, which are crucial for developing localized adaptation strategies. Furthermore, the research extends to evaluating the uncertainties involved in hydrologic model selection and the effectiveness of different climate models in predicting hydrological extremes. Through a combination of multi-model ensemble analyses and Bayesian approaches, these studies assess the variability and reliability of hydrologic forecasts, providing a deeper understanding of runoff extremes and their impacts on water resources. Additionally, several papers investigate the broader socio-economic impacts of climate change, such as the implications for agricultural water management, drought risk assessments, and public perceptions of climate risks communicated through social media. These studies highlight the critical interplay between human activities and climate dynamics, emphasizing the need for integrated approaches to manage water resources and enhance societal resilience against climate-induced hazards. Overall, the research presented in this section not only advances scientific understanding of the hydrological impacts of climate change but also contributes practical insights into managing these challenges, fostering sustainable development and adaptive strategies in response to evolving climate conditions.