Terrace Bench

The boundary of level bench terrace is aligned along the contour line but in case of inwardly sloping bench terraces having same bench boundary they are executed on the longitudinal grade facing towards outlet.
Terrace bench. Selection of the type of bench terrace among the three types described earlier depends upon the rainfall and soil conditions. Bench terraces slopping inward are preferred to construct in the areas of heavy rainfall and less permeable soils from where large portion of rain water is drained as surface runoff. These are conservation structure where a slope is directly or slowly converted into a series of level steps like a staircase on a slope and ledges.
Bench terraces are constructed to reduce the slope of hill sides to reduce runoff flow velocity and thus prevent soil erosion. The design of bench terraces consists of determining the 1 type of the bench terrace 2 terrace spacing or the depth of the cut 3 terrace width and 4 terrace cross section. The flat areas between the terraces are used for growing crops such as grass and legumes.
The sediments underlying the tread and riser of a terrace are also commonly but incorrectly called terraces leading to confusion. A narrow terrace is often called a bench. Terraces can also consist of a tread bounded on all sides by a descending riser or scarp.
Such types of bench terraces have a provision to drain the runoff from their inner side by constructing a drainage channel as shown in fig. The following are two main types of bench terraces. Types of bench terraces and criteria for selection.
Bench terraces sloping outward are also known as orchard type bench terrace. For such type of bench terraces constructed on the soils having poor permeability the provision of graded channel at lower end is most essential for disposing surplus surface water to the grassed waterway outlet. Irrigation or level bench terraces.
Terraces are formed in various ways. Bench terrace as a noun bench is a long seat for example in the park or bench can be weightlifting the weight one is able to bench press especially the maximum weight capable of being pressed. Bench terraces are a series of level or virtually level strips running across the slope at vertical intervals supported by steep banks or risers.