HEC-RAS (Hydrologic Engineering Centers-River Analysis System) is a software application used for modeling water flow in rivers, channels, and other waterways. It is mainly used by engineers and hydrologists for hydraulic analysis, floodplain mapping, and bridge and culvert design. The application uses hydraulic and hydrologic principles to calculate water depths, velocities, and flow rates in order to predict how a river or waterway will behave under specific conditions. It also helps in predicting the impact of changes in flow on the environment and infrastructure.

Natural Channel Design refers to the process of creating and restoring stream channels to mimic natural conditions, promoting ecological health and stability. This skill involves understanding hydrology, sediment transport, and habitat requirements to develop channels that support diverse aquatic and riparian ecosystems. Knowledge of Natural Channel Design is used to enhance water quality, reduce erosion, and improve flood management by integrating natural processes into channel design and restoration projects.

Sediment Transport refers to the movement of solid particles, typically soil and rock, from one location to another by natural forces such as water, wind, or ice. This skill encompasses the understanding of the processes and mechanisms that govern sediment movement, including erosion, deposition, and sedimentation. Knowledge of Sediment Transport is used to analyze and predict changes in landscapes, manage river systems, and inform construction and environmental projects by assessing sediment dynamics and their impact on ecosystems.

Stream restoration involves the application of specialized skills and techniques to improve the health and functionality of degraded or damaged streams. This may include activities such as stabilizing stream banks, restoring natural flow patterns, and reintroducing native vegetation and aquatic species. It requires expertise in hydrology, geomorphology, ecology, and engineering, as well as knowledge of local regulations and permitting requirements. Stream restoration is typically undertaken in partnership with stakeholders such as landowners, community groups, and government agencies.

Water Resources refers to the management and allocation of water supply for various uses, including agricultural, industrial, and domestic purposes. This skill encompasses the understanding of hydrology, water quality, and environmental impacts, enabling effective planning and sustainable use of water systems. Knowledge of Water Resources is used to develop strategies for water conservation, flood control, and the protection of aquatic ecosystems, ensuring the availability of clean water for current and future generations.