Explanation: The Hooghly River is a crucial distributary of the Ganga River that flows through West Bengal, India. It originates from the Ganga at the Farakka Barrage and flows through the state before emptying into the Bay of Bengal. The Hooghly is particularly significant in the context of West Bengal's geography and hydrology, especially concerning flood patterns.
During the monsoon season, the Hooghly River experiences a significant rise in water levels due to heavy rainfall and the confluence of multiple tributaries. The river's floodplain is a critical area for understanding the impact of flooding in West Bengal. The Hooghly's floodplain is characterized by low-lying areas that are prone to inundation during high water levels. This makes the Hooghly a focal point for flood management and disaster preparedness in the region.
The Ganga River, while a major river in the region, does not directly flow through the flood-prone areas of West Bengal. Instead, it is the Hooghly, as a distributary, that carries the floodwaters through the state. The Yamuna River, on the other hand, is not part of the West Bengal river system. It is a major tributary of the Ganga but flows primarily through the states of Uttar Pradesh and Haryana, and does not contribute to flooding in West Bengal.
Understanding the specific geographical and hydrological features of the Hooghly River is essential for comprehending the flood patterns in West Bengal. The river's course, the confluence of tributaries, and the low-lying floodplain all contribute to the river's tendency to flood during the monsoon season. This knowledge is crucial for effective flood management and disaster preparedness in the region.
In summary, the Hooghly River is the correct answer because it is the specific distributary of the Ganga that flows through West Bengal and is most prone to flooding during the monsoon season. This makes it a critical focus for understanding and managing flood risks in the state.