Kharazmi Journal of Earth Sciences

Kharazmi Journal of Earth Sciences

Investigation of the performance of grout curtain at the Rudbal Dam site (Fars Province)

Author
University of Tehran
Abstract
The Rudbal Dam, with a reservoir capacity of 82 million cubic meters, is located in the Rudbal Valley near Darab City. The dam and reservoir are in contact with Sarvak limestone and radiolarite on the right and left abutments, respectively. The possible water leakage route includes an inlet window, transfer route, and outlet window. The inlet window comprises Sarvak limestone and river alluvium, in part of which the grout curtain has been constructed. Since the reservoir was filled in 2016, persistent water leakage has occurred. The purpose of this study is to investigate the physicochemical characteristics of the water sources around the dam to determine the path of water leakage through or around the grout curtain. For this purpose, the physicochemical characteristics of 83 water sources were measured. Water sampling was also carried out at 30 points, and the concentrations of its main elements were determined. By evaluating the results of the analyses, the relationship of the samples with the reservoir water was determined. Examination of characteristics such as water type, electrical conductivity, and temperature showed that the inlet window at the dam site had not been completely sealed by the grout curtain, allowing some water to leak. By considering that the exact path of water leakage cannot be determined based on the results of a single sampling step, it is recommended to conduct a complementary isotopic and hydrochemical study.
Keywords
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