รายละเอียดตัวอย่าง

The given diagram illustrates the various stages in the process by which rain water is gathered and processed to become drinking water in a certain town. Overall, the man-made process consists of several stages, beginning with the collection of rain water from drains and ending with the supply of drinking water to local residents. In the first stage, rain water is collected through drains and directed to a water filtration system. Once the water reaches the filter, impurities are removed as a preparation for the following stages. This is followed by a chemical treatment stage, during which chemicals are added to the filtered water before it is transferred to the storage tank. In the next stage, the filtered water undergoes a treatment process where chemicals are added to purity it further. After that, the water is stored in a large tank. Next, the stored water is transported through pipes to households. Finally, the water is supplied to residents as drinking water, thereby completing the man-made process.