The erosion of a floodplain describes the process in which earth is worn away by the movement of a floodway. There are two major processes involved in the natural development of floodplains: erosion and aggradation. As the Zambezi leaves the wide floodplain of the sandy Kalahari, it enters a narrow basalt channel as fast-moving whitewater rapids. Ngonye Falls, Zambia, marks a remote stretch of the Zambezi River where the floodplain is extremely narrow. These rivers usually have a steep stream gradient-a very deep, fast-moving channel. In fact, some rivers, or parts of rivers, seem to have no floodplain at all. Some rivers have very narrow floodplains. The Barotse floodplain includes the sandy Kalahari basin, which is waterlogged during the rainy season and an extension of the nearby Kalahari Desert during the dry season. The Barotse floodplain of the Zambezi River, for example, is a vast wetland stretching thousands of kilometers through Angola, Zambia, and Botswana. Some floodplains are extraordinarily wide. The flood fringe of the seasonal Todd River extends the floodplain to 445 square kilometers (170 square miles). Bluff lines, also called valley walls, mark the area where the valley floor begins to rise into bluffs. The flood fringe extends from the outer banks of the floodway to the bluff lines of a river valley. The floodway of the Todd River in Australia’s Northern Territory, for instance, is an ephemeral stream, meaning its channel can be dry for months at a time.īeyond the floodway is the flood fringe. Floodways can sometimes be seasonal, meaning the channel is dry for part of the year. The first is the main channel of the river itself, called the floodway. It stretches from the banks of the river to the outer edges of the valley.Ī floodplain consists of two parts. ![]() This will enable me to send you notifications of products as they are uploaded to the shop.Īcknowledgements: Our shop logo font is by Jessica Ann Stanford - Stanford Fonts Vol.A floodplain (or floodplain) is a generally flat area of land next to a river or stream. Be the first to know about new clipart, freebies, and sales - just click the green star at the top of the page next to The Painted Crow logo. Please download the preview above for complete Terms of Use. These graphics can be used for both personal and commercial use. ***Courtesy notice to my customers: this individual clip art set will also be part of an upcoming separate Natural Disasters bundle*** YOU MIGHT ALSO LIKE: The clipart illustrations measure approximately 6 inches to preserve image quality when resizing, and include: ![]() No watermarks will appear on the file that you download. ![]() These are high resolution (300 dpi) transparent background PNG files. The set includes 12 PNG color illustrations, and 12 PNG blackline/grayscale versions of the same illustrations. In addition, the set also includes a snow avalanche and 3 flood related graphics (river valley, river in flood, and cross section of earthen levee). It includes illustrations of mitigation efforts such as fences and mesh, retaining walls, and reforestation of slopes. This 24 piece set's main focus is on mass wasting events - rockslide, rockfall, mudslide, and lahar.
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