Grass waterways

• Grass waterways is earth waterway planted with grasses (such as . dubo, centipede grass) to control soil erosion
• Waterways are important for removing surplus water from terraced field and for erosion control. They are constructed along the slope of area (<20%).
• 2-m to 48m wide
• The uses of grasses in this measures act as lining material to control the problem of erosion caused by turbulent runoff flow through the section.
• allows increasing soil cohesion and roughness.(reduce K),
• also prevents the formation of rills and gullies.

Advantages:

a) It carries large flow and make it suitable for large watershed.

b) Farm machineries can easily cross them.

c) After establishment of grasses, its maintenance become very easy.

Disadvantages:

a) It restricts the installation of the drainage outlet.

b) At few locations the establishment of vegetation is being very difficult