In the highest level engineering, drainage and grading are inseparable. The terrain has been sculpted to direct rainwater into a well-managed drainage network. An effective drainage plan is essential to prevent rainwater from pooling around the foundations of buildings. Avoid floods or water damage that could spread to nearby properties. Sheet flow, open channels, or capture through catch basins or other drainage inlets are all examples of conveyance. Once the water has been collected, it is transported and discharged to a city-approved area using appropriately sized and sloping pipework.