Using a magnetic field to reduce the hardness of runoff water from rainfall

In recent decades, due to climate changes, the decrease in rainfall and the subsequent serious decrease in water resources have made the engineers think of finding a solution to supply the lack of water shortage in various fields, including agriculture. Since various methods have been investigated and implemented all over the world, high cost and sometimes long time and the use of chemicals for purification are among the disadvantages of those methods. Therefore, a method that is cheap and free of any chemicals can attract public attention. Among these methods is wastewater magnetization, which has been investigated recently. In the current research, which was carried out in a descriptive and library study, the aim is to introduce and investigate the magnetization method to reduce Calcium and Magnesium from rainwater runoff on a small scale for agricultural and industrial applications, and at the end, some suggestions will be suggested for further studies.