This paper examines the distribution of lateral density gradients within a shallow estuary during a typical flood-neap tide. The investigation utilizes data obtained from three comprehensive Compact Conductivity-Temperature-Depth (CTD) sensor campaigns, which deployed the CTD sensor and other instruments at a strategically chosen bridge crossing in the estuarine region. The outcomes of this study reveal substantial variability in the lateral density gradient values throughout the observation period, albeit demonstrating a consistent overall trend. Remarkably, despite significant density fluctuations, the lateral density gradient remains relatively stable. The data analysis reveals a strong connection between the salinity and lateral distribution of the density gradient, with the density gradient identified as the main contributing factor. Additionally, the study reveals that the relaxation of the lateral density gradient is a common mechanism affecting the distribution of lateral salinity. This research enhances our understanding of estuarine dynamics and offers important insights into the factors that shape lateral density gradients and salinity patterns.