Cross Drainage Works are needed for the following purpose: To keep the water flowing smoothly and avoid water mixing in the canal and drainage systems. At crossing point sites, the canal's and the drainage system's natural flow directions cannot be changed.

The construction of cross drainage work involves the following steps: 1. Calculating the highest flood discharge. 2. Determining the flow of drainage water. 3. If the canal is to be flumed, the waterway must be contracted. 4. Determination of Head loss by barrel siphons. 5. Establishing the uplift pressure on the canal or drain bed. 6. Determining the uplift pressure on the drain or canal bed.

The following factors should be considered while selecting the most suitable type of the cross-drainage work. Relative levels and discharges. Performance. Provision of road. Size of drainage. Cost of earthwork. Foundation. Material of construction. Cost of construction.

When a canal crosses a natural drain, a structure called a cross drainage work is built to stop the water from the drain from getting into the canal. As this kind of building is more expensive, it should be avoided if possible.

The canal is allegedly eroding, and the banks might soon give way. For the purpose of draining extra water from the irrigated field, a drainage system is required. This extra water might be surface runoff from rainfall or irrigation wastewater. Water seepage or leakage from the distribution system is another possibility.