Rainwater Harvesting Techniques Quiz

The ideal location for a rainwater harvesting tank should be in a spot that is: 1) Not near large trees due to root damage, 2) Close to the cultivation area for efficient irrigation, 3) Away from houses, paths, and roadways to prevent accidental falls, 4) With an opening facing the prevailing rainfall direction.

A circular tank structure is recommended for better water pressure resistance compared to other shapes. It's important to calculate the water volume required for irrigation based on the rainfall patterns and crop requirements of the area.

Rainwater harvesting tanks should have self-operating outlets to release stored water efficiently into nearby streams or canals.

It's crucial to prevent obstruction of natural water flow during tank construction. This avoids soil erosion and protects crops from damage.

A fence around the tank is an important safety precaution, especially for children and preventing accidental falls.

An ideal rainwater harvesting tank should have a depth of no more than 1.75 meters to maintain manageable water pressure and ease of cleaning.

Table 2 in the document provides guidelines for determining the radius of the tank based on the required volume.

The amount of liquid a tank can hold, typically measured in liters.

The distance from the center of a circle to its edge (in this case, the center of the tank to its outer wall).

A strong base made of concrete, laid at the bottom of the tank to provide a stable foundation.

The process of building vertical walls around the concrete slab, using bricks and cement mortar.

An opening in the tank through which water enters, located at ground level and carefully positioned towards the natural flow of water into the garden.

A sturdy barrier placed near the inlet to protect the tank from debris and prevent dirt from entering.

An essential ratio for concrete mixtures, typically in the form of sand, cement, and gravel, to achieve optimal strength and durability.

A ratio of cement to sand used for constructing tank walls, ensuring a strong and cohesive bond between the bricks.

A channel constructed near the inlet to collect and direct excess water away from the tank, improving water management and preventing overflow.

Small bunds built across the inlet 'V' to trap waste items flowing in with rainwater.

A raised area within the bunds where collected waste is deposited.

A 22 cm opening at the opposite end of the inlet, used to release excess water after rain.

The outlet is built 1.25 cm higher than the inlet door to ensure water flows out before reaching the inlet.

Plastering the tank with cement, extending 15 cm above ground level for protection and durability.

The space left around the tank during construction, filled with sand for easy access and repair.

The recommended cleaning process for the tank when the water is empty.

A thatched hut and fence built around the tank to reduce evaporation and enhance safety.

The estimated lifespan of a rainwater harvesting tank with proper maintenance.

The main reason to clean the tank after it is empty.

An ephemeral river channel that is dry most of the time but carries water during periods of heavy rain.

This technique involves capturing rainfall in a series of bunds, or small earthen dams, to store water for crop irrigation.

Bund design for slopes less than 0.5% involves using straight bunds with open ends that spread floodwater.

Bund design for slopes between 0.5% and 1.0% uses graded bunds with wings to further slow down the flow.

An enclosed structure that is used to store rainwater for various purposes, like domestic use and irrigation.

A water harvesting technique where small, individual catchments are created using contour bunds (ridges) along the slope of the land, collecting and storing rainwater for trees.

A simple, inexpensive water harvesting technique that uses natural depressions in the ground to collect and store rainwater.

A specific type of microcatchment that uses a network of interconnected pits to collect and store rainwater.

A type of microcatchment that uses semi-circular or triangular bunds to collect water from a wider area and direct it towards a specific point for storage.

A type of microcatchment that uses stone bunds to collect and store rainwater in small areas.

A large-scale water harvesting technique using a series of stone bunds or other barriers to collect and store rainwater in a larger area.

A specialized water harvesting technique designed to capture and store water that flows over the surface of the land.

These are techniques used to store water in a place where it can be utilized efficiently, often involving tanks or reservoirs.

These techniques use naturally occurring depressions in the land to collect and store rainwater.

These techniques use larger structures like stone bunds or hillside conduit systems to capture and store water over broader areas.