Dhasan River

The Dhasan River is an important river in central India and serves as a right-bank tributary of the Betwa River. Flowing through the Bundelkhand region of Madhya Pradesh and Uttar Pradesh, it is one of the major northeast-flowing tributaries of the Yamuna River in the rain-deficient areas of central India. The river has long played a significant role in the region's drainage system and geography. In ancient times, it was known as the Dasharna, reflecting its historical and cultural importance.

Dhasan River originates in Begumganj tehsil of Raisen district in Madhya Pradesh before flowing through Sagar district. As it continues its course, the river forms the southeastern boundary of Lalitpur district in Uttar Pradesh. Covering a total length of 365 kilometres, approximately 240 kilometres of the river flows through Madhya Pradesh, while 54 kilometres mark the shared boundary between Madhya Pradesh and Uttar Pradesh. The remaining 71 kilometres lie within Uttar Pradesh before the river finally joins the Betwa River near Jhansi. 

The Dhasan River is fed by several tributaries that contribute to its flow. Its major tributaries include the Jamni, Bina, Ur, and Birma rivers. Other important tributaries are the Kathan, Mangrar, Bachneri, Sukhanai, and Rohni rivers, which further strengthen the river system across the region.

Dhasan River supports irrigation and water management through several key infrastructure projects. Two dams have been constructed on the river. They are the Pahari Ban Sujara Dam and the Ghat Lahchura Dam, located further downstream. In 1910, the Dhasan Canal System, a three-branched irrigation canal network, was commissioned to divert a portion of the river's flow and supply water to the Bundelkhand region, significantly enhancing agricultural irrigation. 

Dhasan River basin is divided into five sub-watersheds, namely Rohni, Bila, Sukhnai, Lakheri, and Ur. These sub-watersheds play an important role in managing the river's drainage and water resources across the basin. 

Dhasan River flows through the Bundelkhand uplands, playing a significant role in the region's undulating landscape. Over time, its geomorphological activity has contributed to the formation of distinctive landforms, including ravines. Along with the Jamni River, the Dhasan serves as a major feeder within the Ken–Betwa basin, making it an important component of river-linking and irrigation initiatives aimed at improving water resource management in the region.

Known as the Dasharna in ancient times, the Dhasan River has long held historical and cultural significance. Even today, it continues to be revered by residents of the surrounding villages, who consider it a sacred river and regard it with deep religious respect.

The Dhasan River faces several environmental challenges, including seasonal drying, soil erosion, and the over-extraction of water. These issues reflect the broader problem of water stress in the Bundelkhand region, where recurring droughts and increasing pressure on water resources continue to affect the river's ecological health and long-term sustainability.