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Muddy flood
A muddy flood is produced by an accumulation of run-off over agricultural land . Sediments are picked up by the run-off and carried as suspended matter or bed-load. Muddy floods are typically a hill-slope process, and should not be confused with mudflows produced by mass movements. Muddy floods can damage the road infrastructure and may deposit layers of mud blanket and may also clog sewers and damage private property. It has been referred to 'muddy floods' since the 1980s.〔Boardman, J. (1984). Soil erosion and flooding on downland areas. The Surveyor, 164, 8-11.〕 A similar designation appeared in French ('inondations boueuses'〔Auzet, A.V. (1987). L'érosion des sols cultivés en France sous l'action du ruissellement. Annales de Géographie, 537, 529-555.〕) during the same period. == Muddy flood generation ==
Muddy runoff is generated on agricultural land when the soil surface is exposed or sparsely covered by vegetation. Large quantities of run-off usually generated by heavy storms is needed to start such a flood.〔Evrard, O., Vandaele, K., Bielders, C.L., van Wesemael, B. (2008). Seasonal evolution of runoff generation on agricultural land in the Belgian loess belt and implications for muddy flood triggering. Earth Surface Processes & Landforms 33(8), 1285-1301.〕
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