The invention relates to the technical field of
sponge city building rainwater management, and provides a building facade ecological interception
system and a building facade rainwater ecological interception method, and the
system comprises a source emission reduction layer which comprises a plurality of
layers of
greening hanging pot assemblies which are arranged along a building facade and have a
density gradient of being sparse at the upper part and dense at the lower part and are used for planting plants; each
greening hanging pot
assembly is filled with a water-permeable substrate, and a capillary medium compounded by coco
coir and
vermiculite is embedded in each
greening hanging pot
assembly; the
process control layer comprises a vertical flow guide groove correspondingly connected with
percolation holes in the bottom of the greening hanging pot
assembly, a transverse bent flow channel connected with the vertical flow guide groove, and
tail end flow dividing branches connected with the two ends of the transverse bent flow channel; the
tail end utilization layer comprises a
water storage and recycling unit for collecting and purifying rainwater and an underground capillary
percolation well for permeating the rainwater into deep soil, and the
water storage and recycling unit and the underground capillary
percolation well are respectively connected with one
tail end
shunting branch. Through cooperation of ecological interception and
engineering diversion, rainwater slow flow
permeation and resource recycling of the building facade are achieved, and climate regulation and
carbon sink improvement are both considered.