River capture, also known as stream piracy, occurs when a river diverts its flow from one drainage basin to another. This natural process often has a significant impact on the sustainability of the river as an ecosystem. Firstly, river capture can lead to changes in water availability and flow patterns, affecting the habitat diversity and availability of resources. This alteration often disrupts the delicate balance of the ecosystem, impacting the survival of various aquatic species. Additionally, the altered water flow can result in erosion and sedimentation, changing the river's shape and structure, which further affects the habitat and biodiversity. Overall, river capture can have far-reaching ecological consequences, challenging the long-term sustainability of the river ecosystem and its associated species.