👉 A neap is a type of landform that occurs when the topography of a river, stream or lake changes from being flat to being gently sloping. It is often associated with rivers that have been flowing for many years and are therefore more likely to be influenced by natural processes such as erosion, tectonic activity or glacial till. The term "neap" comes from the Latin word "næp," which means "rise" or "slope." This term is used to