Riparian areas are the lands immediately adjacent to rivers, streams, lakes, and other water bodies. These transitional zones between aquatic and upland environments provide critical ecological functions: filtering pollutants, controlling erosion, moderating water temperatures through shade, and providing habitat for wildlife. Healthy riparian areas improve water quality downstream. Environmental regulations typically restrict development in riparian zones and may require vegetated setbacks from waterways. Municipal planning addresses riparian protection through zoning, environmental policies, and development conditions. Riparian restoration—replanting native vegetation along waterways—is a common environmental improvement project. Indigenous communities have long recognized the importance of riparian areas.