Drip irrigation is a modern irrigation method that delivers water directly to the roots of plants, while the other options are traditional water harvesting techniques.

The main purpose of water harvesting is to collect and store water during the rainy season to make it available for use during the dry season.

Contour bunding is a method of water harvesting where small embankments are built along the contours of a slope to slow down the flow of water, allowing it to infiltrate the soil.

Rooftop rainwater harvesting involves collecting rainwater from rooftops through gutters and pipes and storing it in tanks or reservoirs for later use.

Terracing is a water harvesting method where a series of terraces are constructed on a hillside to slow down the flow of water and allow it to infiltrate the soil.

A percolation tank is a water harvesting structure that collects and stores rainwater, slows down the flow of water, and allows it to infiltrate the soil, recharging groundwater aquifers.

Fog harvesting is a water harvesting technique that involves collecting water from fog droplets using large nets or meshes, which is particularly useful in arid and semi-arid regions where rainfall is scarce.

Water harvesting in agriculture provides multiple benefits, including increased crop yields due to improved water availability, reduced soil erosion by slowing down water flow, and improved soil fertility by increasing soil moisture content.

Subsurface dams are water harvesting structures built underground to store water, typically constructed across a valley or streambed to capture and store water during the rainy season.

Dew harvesting is a water harvesting technique that involves capturing water vapor from the air and converting it into liquid water using specially designed surfaces that promote condensation.

Rooftop rainwater harvesting is a widely adopted water harvesting method in urban areas, where it involves collecting rainwater from rooftops and storing it for later use.

Contour trenching is a water harvesting technique that involves digging trenches along the contours of a slope to slow down the flow of water, increase water infiltration, and reduce soil erosion.

Check dams are small dams or embankments constructed across a river or stream to slow down the flow of water, trap sediment, and increase water infiltration.

Spring development is a water harvesting technique that involves capturing water from natural springs and storing it for later use, typically through the construction of collection structures and storage tanks.

Subsurface channels are water harvesting structures built underground to transport water from one location to another, typically used to convey water from a collection point to a storage reservoir.