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b)Stone lines - Are stones heaped along contour to trap soil that is being washed away /check run off.
• Trash lines - Train or crop residues are heaped along contour to trap soil before it is washed away.
• Cut-off drains / diversion ditches - They are channels that divert water run off from cultivated
• slopes into areas where it can cause erosion.
• Gabions/porous dams - Are boxes made of wire mesh and filled with stones. They are built across
• slopes - dry valley or gullies to trap soil and reduce speed of run off.
• Ridging - ridging ridges constructed along contours of the field to slow down run-off and trap
• eroded soil.
• Bunds - Heaps of soil on earth built on sloping land along contours trap.
• Dams - Reduce its speed / run off speed.
• Terraces - constructed on hilly areas by exacavating soil throwing uphill. (fanyajuu terrace)
or down (fanyachini terrace) hence slow down surface run-off and divert water away from cultivated.
Dominic Onsase answered the question on March 5, 2018 at 14:06
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