Which drainage system is described as draining the whole south-western part of Mizoram and forming a boundary line between Mizoram and Bangladesh?

The drainage systems of Mizoram are an important aspect of the state's geography, particularly in understanding the hydrological features and the natural boundaries formed by these systems. Mizoram, located in the northeastern part of India, is characterized by a complex network of rivers and streams that drain into different parts of the state and neighboring countries.

The Khawthlangtuipui Drainage System is one such significant drainage system in Mizoram. It is located in the southwestern part of the state and plays a crucial role in the hydrology of the region. This drainage system is notable for its function as a natural boundary between Mizoram and Bangladesh. The rivers and streams within this drainage system flow from the highlands of Mizoram and eventually drain into the neighboring country, forming a natural demarcation line.

Understanding the drainage systems of Mizoram is essential for several reasons. Firstly, it helps in comprehending the geographical layout of the state and its relationship with neighboring regions. Secondly, it is important for water resource management and planning, as the drainage systems influence the distribution and availability of water resources. Lastly, the drainage systems are also significant for ecological and environmental studies, as they impact the biodiversity and ecosystems of the region.

Other drainage systems in Mizoram, such as the Tlawng, Chhimtuipui, and Tuivawl, are also important but serve different geographical and hydrological functions. The Tlawng Drainage System, for example, is located in the eastern part of Mizoram and does not form a boundary with Bangladesh. Similarly, the Chhimtuipui and Tuivawl Drainage Systems are situated in different regions of the state and do not drain the southwestern part or form a boundary with Bangladesh.

In conclusion, the Khawthlangtuipui Drainage System is the correct answer as it is the drainage system that drains the southwestern part of Mizoram and forms a natural boundary with Bangladesh. This system is a key geographical feature that helps in understanding the hydrological and boundary aspects of Mizoram.