STUDY ON GENERALIZED EVALUATION METHOD FOR SEEPAGE OF ROCKFILL DAM

Abstract

 To observe of seepage rate at rockfill dams is important for dam safety management, but the observed volume includes that from the reservoir through the dam body and foundation, as well as that from meteorological effects such as precipitation. In order to therefore grasp the state of the impermeable function of the dam body daily, the observation results such as the seepage rate, reservoir level, and meteorological conditions at the managed dams have been organized and analyzed, and established general-purpose model to evaluate how much percolate, considering the relation between the percolation volume and the reservoir level and rainfall response characteristics. As a result, the validity of the model was confirmed by applying it to dams with different meteorological conditions and measurement status of seepage rate. In addition, since the base seepage rate of the dam body can be separated from the calculated value of the general-purpose model, it is inferred to be applicable for the evaluation of dam body safety such as the abnormality judgment of the seepage rate.