Consider the following pairs matching water harvesting structures used in decentralised watershed development with their primary hydrological function:

Pairs

1. Check dam — Arrests surface runoff at a drainage outlet to promote percolation and recharge of groundwater
2. Farm pond — Stores rainwater on-farm to provide supplemental irrigation for rainfed crops during dry spells
3. Contour bund — Diverts excess runoff away from agricultural fields to prevent waterlogging of the root zone