Mathematics · Civil Engineering/Geography

Considering the Assam Flood Hazard Atlas, IS Code 8835: 1978 stipulates that the drains are broadly classified into the following categories according to the purpose for which these are constructed. Match the following List: Types of Drains: a. Cunnette, b. Link drains, c. Outfall drains, d. Ditch drains. Purpose: 1. A small drain constructed in the bed of main drain at level lower than the normal bed levels of the main drain of carrying non-monsoon/seepage discharge without allowing it to spread across the entire section of the main drain. 2. Subcatchment into the outfall drain. 3. To drain the water by connecting borrow pits along roads, railway lines, etc. 4. Drains into a nullah or a river from a particular catchment.