Abstract
Soil erosion is the universal land degradation event which invites an enormous challenge for its rehabilitation. Among all forms, gully erosion is the most worst and visible form of water erosion which cannot be controlled without any permanent gully stabilization structure. Therefore, the study was conducted to evaluate the impact of gully plugging spillway to rehabilitate the eroded land. For this purpose, a highly eroded site was selected within the study area, surveyed to estimate the structural design and brick masonry work was executed accordingly. The consequences of study clearly illustrated that straight drop spillway is an effective hydraulic structure which considerably fulfilled its objectives by plugging the gully to stop further erosion as well as stabilizing the eroded land.
Highlights
Soil erosion is a geographically predominant land degradation phenomenon which confronts the global agriculture (Leh et al, 2013)
For this purpose width and height of gully bed was measured for the calculation of different components of spillway (Fig. 1) and an estimate was prepared for the execution of brick masonry work according to the particular design of structure
Where Q is the discharge capacity in ft3 s-1, L is the length of spillway in ft which was equal to the width of gully bed and H is the notch in ft
Summary
Soil erosion is a geographically predominant land degradation phenomenon which confronts the global agriculture (Leh et al, 2013). Gullies are defined as small channels or valleys formed due to cutting action of concentrated as well as intermittent runoff during and immediately following heavy rains (Soil Science Society of America, 2008). It is a key process regarding the production of sediments [14] which shares 10% to 94% of deposits in water bodies (Addis et al, 2015; Bennet et al, 2000; Poesen et al, 2003).
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