每栋民居的天井都是相互连接的，在民居之外，天井下渗的水通过倾斜的地形在

Mei Dong residential patio are interconnected, outside the houses, patio infiltration by water pooled in the ground sloping terrain, ultimately to the pond. This process reduces the impact of human settlement on the surface runoff, infiltration and catchment combined effect patio, extending the time the rain stays in the ground, have some effect on Flood Control. After precipitation from vegetation, after settlement, and finally into the pond this process, the retention of rain experienced many times, can be effectively reduced surface runoff and increase infiltration process.

Each residential patio is interconnected, and outside the house, the water seeping through the underground is pooled through the sloping terrain and eventually flows to the pond. This process reduces the influence of human settlement on surface runoff, combined with the water collection and permeation of the patio, prolongs the time of rainwater stay on the surface, and has some effect on the control of rain and flood. From the process of precipitation passing through vegetation, through settlement, and finally into the pond, the rain water experiences multiple strandings, which can effectively weaken the surface runoff and enhance the permeation process.

The patio of each house is connected with each other. Outside the house, the water infiltrated from the patio is collected underground through the inclined terrain and finally flows to the pond. This process reduces the impact of human settlements on the surface runoff. Combined with the water collection and infiltration of the patio, it extends the time of rainwater staying on the surface and has certain effect on the control of rainwater and flood. From the point of view of the process of precipitation passing through vegetation, settlement and finally into pond, rainwater can effectively weaken surface runoff and enhance infiltration process through multiple detention.