The water cycle is the continuous cycle of water movement on Earth. Water is always moving and always changing forms. Water is most notably observed as precipitation. And also, storm water is defined as the result of precipitation occurrences, usually due to extremely heavy rainfall. Health and safety reasons dictate that careful storm water management is crucial, especially in urban environments.

Storm water can carry disease as well as more mundane pollutants, and the protection of domestic water supplies and flood defendant is crucial. One relatively recent example of the problems caused by storm flooding and excessive flows is the British city of Sheffield. In 2007, the city suffered extensive flooding to sustained and egregiously high levels of summer rain, which tested the area’s flood defences and caused widespread disruption to local people, including the loss of power and water supplies. A massive re-assessment of the city’s aquatic management systems and environment was the result.

From the above real story, we can tell runoff controlling systems must be beneficial at the long run. In the United States of America, the management of storm water runoff is taken care of by the Environment Protection Agency (EPA). They have developed a computerized model to help them with this monumental chore. The system enables the entering and editing of data about the runoff watershed. When they are not tracking flow rates and depths in real time, they can run simulations of hydraulic control to determine what is likely to work. Similar systems have been applied in Canada as well. We believe that, with the high awareness of storm water runoff problems, the tragedy won’t repeat by itself again.