Causes of Flooding

.

 1 House  ( 250 m2 )

                 35 ,000 Liters / year

                        150 Lters/ m2 annual

 ( 410 ml /day/m2 )

                        1 square meter :

   1 residence 1  lotissements

   40 plots / per hectare  

   250 m2 x  40 = 10,000 m2 = 1 hectare      

 1 house = 35,000 liters/ YEAR

 40 houses = 35,000 x 40 = 1,400 000 liters/year 

       = 1, 4 billion/year 

 rounde to 1,5 billon L/year                                                                                                                                                          

  Waterfall   600 mm/ year

  .