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Multifunctional low impact development bioretention system

A low-impact development and bioretention technology, applied in the field of low-impact development of bioretention systems, can solve problems such as high cost and increased difficulty in municipal pipeline networks, and achieve the effect of alleviating runoff pollution

Inactive Publication Date: 2018-12-21
SHANGHAI INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, due to the fact that most of the urban development and building construction have been completed, it is more difficult to build a municipal pipe network on this basis, and the cost is extremely high

Method used

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Such as figure 1 A water storage multifunctional low impact development bioretention system is shown:

[0024] (1) From top to bottom, there are plant layer 3, runoff water temporary storage layer 4, covering layer, planting soil layer 14, sand layer 6, gravel water storage layer 9 and rainwater storage barrel 17.

[0025] (2) In order to meet the daily maintenance and landscape effect, the plant layer 3 adopts drought-resistant and flood-resistant crabapple with well-developed root system.

[0026] (3) The deeper the runoff water temporary storage layer 4 is, the stronger the water storage capacity will be. However, if it is too deep, it may cause serious plant waterlogging. Filter the sediment, and select the water storage depth to be 250mm when designing according to its good structural performance and flood resistance.

[0027] (4) covering layer mainly is to cover the top layer of planting soil layer 14 with bark and leaf, and effect is to keep the humidity of so...

Embodiment 2

[0038] Such as figure 2 A simple and versatile low-impact development bioretention system is shown:

[0039] (1) From top to bottom, there are vegetation layer 3, runoff water temporary storage layer 4, covering layer, planting soil layer 14, sand layer 6 and gravel water storage layer 9.

[0040] (2) Most of the plants selected for the planting soil layer 14 are perennial herbaceous plants. The planting soil layer 14 is the main part of the multifunctional low-impact development bioretention system. In order to meet the daily maintenance and landscape effects, the plant layer 3 adopts drought-tolerant Begonias with waterlogged and well-developed root systems.

[0041] (3) The deeper the runoff water temporary storage layer 4 is, the stronger the water storage capacity will be. However, if it is too deep, it may cause serious plant waterlogging. Filter the sediment, and choose a water storage depth of 150mm according to its good structural performance and flood resistance d...

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Abstract

The invention discloses a multifunctional low impact development bioretention system, belonging to the field of ecological environment construction. The system sequentially comprises a plant layer, arunoff water temporary storage layer, a covering layer, a planting soil layer, a sand layer, a gravel water storage layer and a rain storage bucket from top to bottom, wherein the gravel water storagelayer is provided with a perforated pipe communicated with the outside; the planting soil layer is provided with filler, and the filler is filled in a manner of completely mixing the matrix filler; the filler is prepared from soil, sand and organic matter; the sand layer is used for filtering and preventing soil particles from entering the gravel water storage layer. The multifunctional low impact development bioretention system provided by the invention is mainly used for reducing surface and roof runoff flow, relieving internal waterlogging, removing eutrophic substances such as NH<+4>-N, TN and TP, storing water for secondary utilization, adjusting ecological climate, and the like. The effluent concentration reaches the water quality standard for surface water Class II, so that the system greatly alleviates surface and roof runoff pollution.

Description

technical field [0001] The invention belongs to the field of ecological environment construction, and in particular relates to a multifunctional low-impact development bioretention system. Background technique [0002] With the acceleration of urbanization, problems such as deterioration of urban water quality, black and odorous water bodies, and floods caused by rainwater have become increasingly prominent. Due to the unreasonable urban development, the urban green area is less and less, the permeable surface area is less and less, and the construction of the urban municipal pipe network is neglected. The non-point source pollution caused by rainfall runoff has become an important reason for the deterioration of the urban water environment. . Moreover, various pollutants such as suspended solids, oxygen-consuming substances, nutrients, toxic substances, and oily substances washed away by rainfall runoff on the ground, these pollutants enter the municipal pipe network with ...

Claims

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Application Information

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IPC IPC(8): C02F3/32
CPCC02F3/32C02F2103/001
Inventor 翟光强韩建秋李丹丹周培林
Owner SHANGHAI INST OF TECH
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