Assessment of coefficient of discharge of gabion weir using soft computing techniques Online publication date: Wed, 05-Apr-2023
by Siraj Muhammed Pandhiani
International Journal of Hydrology Science and Technology (IJHST), Vol. 15, No. 3, 2023
Abstract: Unlike classical impervious rigid weirs, organic and dissolved materials can pass through gabion weirs. Thus, due to its minimal negative consequence properties, gabion weirs are preferred over their counterpart rigid weir. It is an edge over rigid weirs due to the flexibility, stability, and eco-friendly reasons as it allows longitudinal movement of water lives and passes sediment and suspended organic materials. This work focused on examining the overflow mechanism of the broad crested gabion weirs under free-flow conditions to assess the gabions' discharge coefficient, Cd, for this weir. Four porosities, as well as mean sizes, were used for this weir. Utilising MLR, an empirical model for Cd was developed which was performing better than the conventional model given by the previous author. The stochastic ANN model was found to be outperforming the other applied models; however, ANFIS-models were giving comparable results. The sensitivity study further suggests that upstream depth and discharge are significant parameters.
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