Insights into Bathymetric Characteristics, Temperature, and Pressure Variations of Tagwai Dam

A Multi-Method Study

Abstract

This scientific article presents the outcomes of a comprehensive investigation conducted on Tagwai Dam, focusing on bathymetric features, temperature, pressure variations, and the development of a Bathymetric Information System (BIS). The research objectives were to establish a sounding datum and baseline bathymetry data, determine temperature and pressure variations, and create a BIS using Arc GIS. This study integrated the latest advancements in satellite-derived bathymetry (SDB) with traditional single-beam echo sounding to provide a comprehensive assessment of the reservoir. From the study, it was discovered that the maximum and minimum observed differences between echo-sounding and SDB-derived bathymetry are +0.06m and -0.09m respectively. Nevertheless, unexpected bathymetric patterns were observed in some regions of the dam which confirm previous studies that raise alarm of fast sedimentation rate within the dam. The study also holds implications for aquaculture and fisheries management. Furthermore, the developed BIS serves as a valuable tool for reservoir monitoring and water resource management.