The Kerala, situated in the southern part of the Indian peninsula, features a network of 44 rivers, including 41 west-flowing and three east-flowing rivers, all originating from the Western Ghats. In this research article, we discuss the fluvial morphometric characteristics of east flowing rivers in Kerala—Bhavani, Kabini and Pambar with the aid of drainage network derived from Shuttle Radar Topographic Mission (SRTM), Digital Elevation Model (DEM) data utilizing 8D algorithm method. Morphometric analysis of drainage systems was performed using ArcGIS software, yielding linear, aerial, and relief fluvial parameters to assess the influence of geology, tectonics, and denudation. This study also conducted a comparative analysis of the drainage data for these east-flowing rivers and evaluated the applicability of the fundamental drainage law. The findings suggest that the drainage network aligns with Horton’s laws of drainage basin evolution, and it exhibits a similar drainage composition to that of the westward-flowing rivers of the Western Ghats.