IntroductionA flood usually involves water overflow onto land that under normal circumstances is dry. Floods can occur any time of the year. The occurrence of floods in some areas can be prevented while in some areas control and prevention may be difficult. In the summer of 2007, floods with devastating effects occurred in central and south east parts of England. Several people died during the floods and many homes were damaged. The economic effects of the floods were beyond estimation as many businesses were forced to close down for several days while some industrial products and raw materials were destroyed.
Crop plants were also destroyed which had severe negative effects on the agricultural sector. Floods in Sheffield were potentiated by the bursting of River Rother and River Don. The floods in Sheffield resulted in deaths, property damage and damage to homes. Many people were also trapped in their houses during these floods. Possible causes of the 2007 summer floodsHuman developments and climatic changes are credited for being behind the June 2007 floods in Sheffield in addition to natural factors. Natural and climatic changes factorsThe primary cause of the 2007 summer floods was the position of the Jet stream during this particular summer.
In the United Kingdom, the prevailing weather is largely dependent on the position of the Jet stream. The weather systems of the Atlantic are steered and generated by the Jet stream. The position of the Jet stream varies with the season. The stream’s position in summer is usually to the north. On the other hand during winter the stream moves to the south. Due to this, the Green sea regions and the northern parts of the Atlantic usually experience storms during summer while the southern parts of the Atlantic usually experience such storms during winter.
The unusual position of the Jet stream in the far south during the June 2007 summer could have been behind the excessive rainfall experienced in the southern parts and central parts of the United Kingdoms. Sheffield experienced a period of low pressure on 24th and 25th of June 2007. This led to prolonged period of heavy rainfall in Sheffield. Sheffield had experienced rainfall for a month before these heavy downpours.
This meant that the saturated soils could no longer absorb more water and therefore the floods resulted. The 2007 summer rainfall was experienced for a prolonged period of time. From its onset in May, it stopped in July. Since there was little evaporation from the ground, the soils were saturated with moisture and the continued rainfall resulted in localized floods. The continuous heavy rainfall in turn led to river flooding owing to the filling of reservoirs by the prolonged rainfall. In addition to these factors, the abnormally warm temperatures which were witnessed during the 2007 summer contributed to the occurrence of the floods.
The temperatures were higher than the normal average summer temperatures. The high temperatures are thought to have resulted in increased evaporation which in turn resulted in more clouds being formed and hence more rainfall that resulted in flooding.