Explanations:Drainage patterns are the geometric arrangement of streams and rivers within a drainage basin. The type of drainage pattern observed in a region is influenced by the underlying geology, topography, and climatic conditions. In the case of Mizoram, the drainage patterns are a result of the region's unique topography and the types of streams present.
Mizoram is characterized by a series of parallel mountain ranges that run from north to south. These parallel ranges influence the direction and flow of streams, leading to the formation of parallel drainage patterns. Parallel drainage patterns are characterized by streams that flow in the same direction, parallel to each other, and are often found in regions with linear topography.
Additionally, Mizoram experiences a tropical monsoon climate, which results in the presence of ephemeral and consequent streams. Ephemeral streams are temporary streams that flow only during the rainy season, while consequent streams are those that follow the path of least resistance, often forming dendritic patterns. Dendritic patterns are tree-like in appearance, with smaller streams converging into larger ones, and are common in regions with gentle slopes and uniform rock types.
The combination of parallel mountain ranges and the presence of ephemeral and consequent streams leads to the formation of trellis, dendritic, and parallel drainage patterns in Mizoram. Trellis patterns are a combination of dendritic and parallel patterns, where the main streams flow parallel to each other, and tributaries join them at right angles, resembling the structure of a trellis.
It is important to note that the drainage patterns in Mizoram are not limited to a single type but are a result of the complex interplay between the region's topography and the types of streams present. Understanding these patterns is crucial for comprehending the hydrological processes and the overall geomorphology of the region.