Urban Flood Management - Carlos E. M. Tucci

The growth rate of the population of Latin America and the Caribbean fell from 2.1% in the early 80s to 1.5% in the first five years of the new millennium, and the trend is heading for 1.2% for the year 2015. [...] The supply of water involves the use of the water available in the source, which is transported to the water treatment plant (WTP) and then distributed to the population via the water mains. [...] With the increase in the population there will always be a city upstream and another downstream, and as the surface water source, the river or the water discharged into the river is polluted, the various strata of the subsoil where the water is drawn from are also polluted. [...] The less efficient are the urban collection and refuse services, the higher the volume of Tdr, so increasing the cost of collection, obstruction of the sewers and the environmental subsidy received by the polluting society. [...] The quality of the water in the storm drains depends on a number of factors: the type and frequency of urban cleaning; the precipitation intensity and its distribution in time and space, the time of year and the use made of the urban area.