water funnel
2.A tornado or lesser whirlwind occurring over water and resulting in a funnel-shaped whirling column of air and spray.
3.With the increasing of water demand in the future,a step scheme and process to new fountains are put forward. Accordingly,these restrictions,such as the water resource gross,the water demand and the environment to drawdown funnel in keeping present status,from 25% and 50% respectively in present,2010 and 2030 year,are improved. The integration efficiency of groundwater and surface water can been exerted and drawdown funnel comeback,to obtain maximam benefit in economy and environment.
