Explanations:West Bengal, a state in eastern India, is characterized by its diverse geography, which includes several major rivers. Among these, the Hooghly River plays a crucial role in the region's hydrology and is a significant factor in the state's flood patterns.
The Hooghly River is a distributary of the Ganga, which originates in the Himalayas and flows through several Indian states before splitting into multiple distributaries. The Hooghly is one of these distributaries, and it flows through West Bengal, eventually emptying into the Bay of Bengal. The river is not only a vital waterway for transportation and commerce but also a source of water for agriculture and daily use.
During the monsoon season, which typically occurs from June to September, the water levels in the Hooghly River rise significantly. This is due to the heavy rainfall in the upper catchment areas of the Ganga and the subsequent flow of water into the Hooghly. The increased water levels can lead to flooding in the surrounding areas, particularly in the lower reaches of the river where the land is relatively flat and prone to water accumulation.
It is important to note that while the Ganga is a major river in India, the part that flows through West Bengal is specifically referred to as the Hooghly. The Ganga itself does not directly flow through West Bengal, but rather forms the Hooghly as it reaches the state. Therefore, when discussing flood-prone areas in West Bengal, the Hooghly River is the correct river to consider.
The Yamuna, on the other hand, is a river that flows through the northern states of India, primarily through Uttarakhand and Uttar Pradesh. It does not flow through West Bengal, making it an incorrect choice for this question. The Yamuna is significant in its own right, but it is not relevant to the flood patterns in West Bengal.
Understanding the geography and river systems of West Bengal is essential for comprehending the region's hydrological dynamics and the factors that contribute to flooding. The Hooghly River, as a distributary of the Ganga, is a key element in this context, and its water levels during the monsoon season are a critical factor in the state's flood patterns.