Mapping Water Temperature in a Reservoir with Three-dimensional Grid Inversion

Measuring dynamic processing of three-dimensional (3D) water temperature is greatly important for continuously observing in temperature sensitive areas. During September 12th to 16th, 2020, a three-station coastal acoustic tomography (CAT) experiment was successfully conducted at Huangcai reservoir, Changsha, China. In this paper, a new three-dimensional grid slice inverse method is proposed for water temperature stereo along three stations. The three-dimensional layer average temperature and variations of water temperature are obtained by solving the new method. The accuracy and reliability of the new method are initially proven by the inversion error and comparison of the three-dimensional temperature inversion results with average temperature in vertical two-dimensional layer. The 3D grid method can be further developed for mapping of high-quality water current and temperature fields especially in small scale water areas.