A vertical upward infiltration irrigation system of rain storage green roof capillary core

Abstract

The invention relates to a vertically upward collected-rainwater infiltrating irrigation system with porous wicks for a green roof. The infiltrating irrigation system is located in a planting frame inwhich a vegetation layer, a soil matrix layer, a filtering layer and a water storage layer are provided in sequence from top to bottom. Porous wicks are further provided, including a long straight bar-shaped first porous wick and a ring-shaped second porous wick. One end of the first porous wick is connected with a plurality of long bar-shaped branch porous wicks, and the other ends of the plurality of branch porous wicks are communicated with the second porous wick, respectively, and are disposed on the second porous wick at intervals. The second porous wick is located in the soil matrix layer, and the first porous wick sequentially penetrates through the soil matrix layer and the filtering layer into the water storage layer. The vertically upward collected-rainwater infiltrating irrigation system with porous wicks for a green roof provided in the invention is characterized by water resource conservation, high water supply uniformity, space saving, low investment cost and the like while utilizing rainwater, as compared with an existing green roof irrigation mode.

Description

technical field [0001] The invention belongs to the technical field of irrigation of green roofs in sponge cities, and more specifically relates to a vertical upward infiltration irrigation system of capillary cores of rain storage green roofs. Background technique [0002] At present, some modular green roof systems, such as some planting module system structures, are drainage layer, filter layer and planting layer from bottom to top. The drainage layer is set at the bottom of the module, and the drainage pipe is set on the side wall of the drainage layer. The drainage layer itself does not store water, and the drainage pipe collects the rainwater flowing through the planting layer and filter layer of the module to the reservoir outside the system , the reservoir is arranged separately from the module. The perforated underground irrigation pipeline is buried in the planting layer, and the irrigation pipeline is connected with the submersible pump arranged at the bottom of ...

AI Technical Summary

Problems solved by technology

If a water storage tank is set up outside the planting system, using the PLC controller and submersible pump to supply water for irrigation is not economical in terms of space utilization. On a roof with a limited area, setting up another water storage tank consumes a certain amount of planting space, and another On the other hand, the permanent storage tank will also increase the load on the roof

In addition, when the buried irrigation straight pipes buried in the horizontal direction of the substrate layer use the humidity sensor to detect the water content of the planting substrate, in most cases, what is monitored is only the maximum overall soil humidity at that time (measured by the sensor near the irrigation pipe outlet orifice). obtained) or detected the overall minimum humidity of the soil at that time (measured by the sensor farthest from the irrigation pipe outlet orifice), it will inevitably cause too much or too little water supply, and it is difficult to ensure the uniformity of water supply

In addition, although the entire irrigation method can be automatically controlled, the initial investment cost is relatively high, and the automatic detection and operation instruments are also easily affected by the harsh environment of the roof. The later operation and management are difficult and costly.

[0005] For irrigation using capillary straight wicks, this method can maintain the humidity level of the planting substrate to some extent, but uneven water supply is still a problem

As for the irrigation method using the capillary pad, the planting container makes the substrate contact with the wet capillary pad through the opening at the bottom, and the water is introduced into the container through the capillary action of the soil, which will inevitably cause the bottom soil of the planting container to be wet and the upper soil layer to be dry In some cases, it is not necessarily possible to ensure a good moist environment in the root zone of the plant

In addition, this irrigation method requires continuous water supply from the water supply dropper to keep the capillary mat moist. Except for the place covered by the planting container, a large area of ​​wet capillary mat will cause a large amount of water to evaporate and lose, resulting in a waste of irrigation water.

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