Step-by-step explanation:
. The rivers in Bhutan emerge from the Great Himalaya and the flow north to south.
2. Most of the Bhutanese rivers join the Brahmaputra before they merge with the Bay of Bengal
3. In the low foothills of southern Bhutan, the rivers exhibit a dendritic pattern, with numerous tributaries joining the rivers
4. The gradient of the rivers fall down south
5. Some of the rivers cause serious flood risks in the southern foothills
6. The total length of the rivers is about 7200 km