Transcription of 1. eRoSIoN BY WAteR
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1. eRoSIoN BY WAteR
1 Types and forms of eRoSIoN ANNEX. by WAteR and by wind 1. eRoSIoN BY WAteR . eRoSIoN by raindrop impact ( splash ). eRoSIoN degree: very weak; value = 1. This form of eRoSIoN is no longer visible after cultivation (ploughing, hoeing etc.). Splash eRoSIoN is a two step process: Break up of soil clods/aggregates and dispersion of soil particles by the kinetic energy of the raindrop impacting on the soil. The dislodged particles may or may not be then moved down slope by surface runoff, and the detached soil particles resettle on the soil surface or are thrown onto plant stems and leaves (herbaceous vegetation or young seedlings). Sheet eRoSIoN This is the type of eRoSIoN that results from runoff that spreads across the soil surface during rainfall ( when the infiltration rate has been exceeded). It may take various forms and degrees. Manual for Local Level Assessment of Land Degradation, Sustainable Land Management and Livelihoods Part 2 Field methodology and tools pp Diffuse runoff: pp Surface scratches: eRoSIoN degree: very weak, eRoSIoN degree: weak, value = 1 value = 2.
Types and forms of erosion by water and by wind ANNE x 1 1. eRoSIoN BY WAteR 1.1 Erosion by raindrop impact (« splash ») EROSION DEGREE: VERy WEAk; VALUE = 1
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