1.1.1. Basin Irrigation

• Land is divided into flat basins surrounded by bunds. • Used for rice, wheat, sugarcane. • Water is allowed to flood the basin and infiltrate gradually.

Basin irrigation is a method where the agricultural land is partitioned into flat plots or basins, which are surrounded by bunds (small earth banks). This setup allows water to be applied to the fields in a controlled manner. By doing this, crops such as rice, wheat, and sugarcane can be effectively irrigated. The water does not just flow away; instead, it floods the basins and gradually soaks into the soil. This method is particularly effective in areas where water needs to be spread evenly across the field.

Think of basin irrigation like filling a bowl with soup. You pour soup into the bowl (the basin), and it fills up to the edges. The bowl’s shape (the bunds) keeps the soup from spilling over. As the soup sits, it seeps into the croutons (the soil) placed at the bottom, which absorbs the liquid. This is similar to how water flooded in a basin gradually seeps into the soil, nourishing the crops just like the soup nourishes the croutons.

• Used for rice, wheat, sugarcane.

Basin irrigation is particularly beneficial for certain crops such as rice, wheat, and sugarcane. These crops thrive in wet conditions, which is why flooding the basin with water is advantageous. For rice, in particular, the flooding helps in weed control and maintains the necessary moisture level. Wheat and sugarcane also benefit from the consistent water supply that basin irrigation ensures.

Imagine being a gardener who is growing a variety of plants. You notice that some plants love water, like a tropical plant that enjoys being in a moist environment. You decide to create a mini pond surrounded by a ring of stones (the bunds) for the tropical plant because it needs that constant moisture to flourish. This is just like how basin irrigation creates an ideal environment for crops that require more water.

• Water is allowed to flood the basin and infiltrate gradually.

In basin irrigation, once the water is released into the basins, it floods the area. The design of the basins allows water to gently enter and saturate the soil, ensuring even distribution. This gradual infiltration helps to maximize the water uptake by plants, minimizing waste. It's a slow process, but it makes sure that the crops receive the necessary hydration without causing excess runoff or water wastage.

If you've ever watered a garden by pouring water onto the soil, you might have noticed how the ground absorbs it over time. If you pour too fast, the water flows away, but if you pour slowly, it gets absorbed much better. This is exactly how basin irrigation works—by allowing water to spread slowly so it can soak into the earth where the plants can use it.

--