Hydrogeological survey of karst area of the reservoir and ultrasonic identification technology of leakage point

ABSTRACT The hydrogeological survey of karst seepage and the ultrasonic identification technology of the seepage point are studied to improve the ultrasonic identification effect of the seepage point. According to the hydrogeological survey of karst leakage in the reservoir, the development types and distribution characteristics of karst in the reservoir are understood. The ultrasonic velocity signal of the reservoir was collected by a laser ultrasonic detector. The internal noise of the ultrasonic velocity signal is removed by the wavelet denoising method. Based on the momentum equation and continuity equation of ultrasonic velocity signal propagation after noise elimination, the calculation model of leakage point location is established to complete the identification of the ultrasonic leakage point. The experimental results show that the technology can detect and acquire the distribution characteristics of karst in the reservoir effectively, and collect the ultrasonic velocity signal of karst in the reservoir. It can effectively select the best wavelet base and remove the internal noise of the ultrasonic velocity signal. It identifies the karst leakage point of the reservoir accurately. Under different water levels of the reservoir, the root mean square error of this technology is small, that is, the accuracy of ultrasonic identification is high.