Hydraulic performance of the aqua-historical structures of Shoushtar

Crossing the heights and entering the plain in Shooshtar, Karoon River is divided into two branches in the vicinity of Mizan weir: Gargar and Shoteyt. Upon historical documents, Gargar is an artificial channel. In 800m downstream of Mizan weir, Gargar bridge-weir and the mills are situated. In this place, different waterfalls exist which used to provide the required energy of the mills. The aforementioned artificial channel joins Karoon River in downstream of Ghir weir. Along Shoteyt, approximately 400m downstream of Mizan weir, Daryoun intake, Daryoun channel and then Shadervan bridge-weir are placed. According to some evidence, Mizan weir sets and splits the flow into the Gargar and Shoteyt branches with ratio of two to one. Shadervan bridge-weir regulates the inflow to Daryoun channel.The presented article deals with the interrelated performance of these structures and the goals for which they are constructed. By means of appropriate software, the hydraulic performance of these structures for base discharges and floods are surveyed. The boundaries of the studied area are: 100 meter upstream of Mizan weir in Karoon River, the waterfalls of Gargar branch, and 100 meter downstream of Shadervan bridge-weir in Shoteyt branch. Using the HecRas software, the way that the flow is set between Shoteyt and Gargar branches are investigated. Furthermore, the role of Shadervan bridge-weir in provision of the water of Daryoun channel is analyzed. It is shown that the Gargar bridge weir has an effective role on controlling the flood damages downstream the falls. Also, the Mizan weir supports the flow distribution between two branches in base flow

کلیدواژه ها:

aqua-historical structures ، Shooshtar ، HecRas ، Karoon River