Effect of Greenbelt Water of Green Roof Index Defined and Planning Measures

Abstract

Green roof is the source of emission reduction measures for sponge city construction. Green roof rate is the volume capture ratio of annual rainfall of the secondary indicators in sponge city urban planning, one of the city special planning or sponge around urban regulatory detailed planning with clear requirements. Green roof is the sponge as the source of urban rainwater runoff water quality of the construction of water control facilities, while effectively improve urban water environment, in order to maintain the growth of plant needs, green roof greening also to have certain demand. Higher the green roof rate is, the better the annual runoff control rate is, but the increase in water demand is also inevitable. Based on the statistics of the sett value of green roof rate for the existing parts of the city, the related relationship between the green roof rate and the plant watered to demand was putting forward based on the urban green plant water demand. On the sponge city planning, the green roof rate is provided with basic and scientific supporting under the premise of considering the greenbelt water.