Thursday 15 July 2010

CHANGES IN RAINFALL IN THE BIG CITY

Humans never free from the influence of natural processes in life. This tends to be a causal relationship means that human life will affect the process in nature, as well as natural processes will bring their own influence on human life. Climate is one of the natural processes that impact on human life, both physically and socially and culturally as a Climate in average weather conditions in an area within a period of relatively low again.
Changes that occur in cycles of regional climate impacts to human life in the area. This impact can be positive or negative impact. Climate speed rating is usually based on the existence of parameters such as rainfall, temperature, humidity, wind seen in the sequence and supported also by the existence of geographic areas. Rainfall many parameters used in determining the climate. It is based on the rainfall data in easy to get a good sequence in the time scale of daily, monthly or yearly. This is quite in accordance with the requirements of the climate assessment that requires the data sequentially. Rainfall amount of water that falls onto the surface of the earth after passing a series of processes such as evaporation, gathering steam, water, the solution (the solution) and the rain itself. rainfall is not always the same in every region, because every region has a rainfall of different characters from one other area. This is caused by differences in the supporting factors of rainfall, especially in the geographic area. Areas with land form on the mountain will have a different character with the area rainfall lowland forms.
Rainfall characteristics is the nature and behavior of rainfall occurred in an area that includes the intensity, area, volume, rainfall duration, frequency and area. air temperature in a place changes over time. Air temperature fluctuation within a day or daily temperature cycle is the result of the comparison between to emit radiation into space at a time in one day. Not a good rule of temperature decrease in the daily cycle is primarily affected by changes in the amount of water vapor and clouds in the atmosphere and the presence of wind and ocean currents that can affect the temperature and heat transfer area impassable. Air temperature affects the amount of high temperature evaporation of more water vapor that can be accommodated by air (higher air capacity). Air temperature is the main cause of air saturation resulted in dew point. As part of the process of occurrence of rain. Various human and industrial activities contribute to changes in temperature atmofser, which in turn will affect the amount of rainfall in the area. Narrowing of the forest area, increasing scarcity of trees in urban and land use changes that cause the region awoke to reduce the level of water vapor, surface so that the intensity of rainfall occurred would be small. Development in urban areas for both residential and industrial services generally leads to the open area is limited in urban areas. This reduces the infiltration of water in urban areas so that surface moisture content becomes so small that the intensity of rainfall is the rainfall changes in the long term will affect the climate in the local area. The concept of urban climate, based on increases in human activity is that of climate change on the sign with atmfoser temperature rise higher than the surrounding area. The condition, usually accompanied by increased rainfall causing an increase in convective activity in the area concerned. large cities is one area that has developed very fast physical building. Rapid development is supported by several factors, such as the strategic location of the city of tall buildings or to develop more housing residents also accelerate the development of physical structures so that the water catchment area in this region increasingly narrow. This phenomenon makes the value of decreased rainfall, so the climate in areas of high accessibility of potential change.