Experimental Investigation of the Effect of Reducing the Length and Angle of the Breakwater on Bank Erosion

Abstract: River banks are exposed to bank erosion and destruction. The undesirable effect of erosion is included muddy water and erosion increasing, river bank destruction and problem of sediment accumulation in shallow. A River utility for human requirements and decreasing the river's dangers are one of the river engineering goals. Expansion and risk of this phenomenon must be recognized by experimental researches. One of the ways to protect of this erosion is Groin with suitable design; not only it can control bank erosion, but also can renew valuable fields. Angles in Groin have an important effect on bank erosion. This research was done by experimental model to nominate Groin's effect on river conservation and reduce river bank erosion. There were 3 lengths (25, 30 and 35cm), 3 angels (45°, 90o and120°) with 5 discharges. Results showed that by increasing Groin's length river banks would reduce in 15-25L/s. Key words: Bank erosion River engineering Groin Groin's angel Groin's length