Why is drainage important in irrigated farming areas?

In the context of land reclamation and agriculture, drainage is a critical companion to irrigation because it ensures the long-term productivity of the land. While irrigation provides necessary water for crops, it often introduces salts that accumulate in the soil as water evaporates. Without adequate drainage, these salts can reach levels that inhibit plant growth, cause dehydration, and lead to the loss of farmland productivity.1234

Drainage systems are essential for maintaining a favorable salt balance by allowing excess water to flush through the soil, dissolving accumulated salts and carrying them away. Furthermore, drainage is vital for managing water tables; subsurface drainage systems are frequently installed to lower high water tables, which prevents waterlogging and ensures that the root zone of crops remains properly aerated.13

By combining irrigation and drainage, land that was previously abandoned due to salt accumulation or excessive moisture can be reclaimed and restored to productive use. Together, these systems provide the precise soil moisture balance required for high-quality crop production.156