Method for collecting rainwater on highways in arid regions

A rainwater harvesting and arid area technology, applied in fertilization methods, botanical equipment and methods, waterway systems, etc., can solve the problems of lack of theoretical basis and design technology, less rainwater utilization on roads, and incomplete rainwater collection technology system, etc. Achieve the effects of improving soil aggregate structure, reducing water pollution, and improving microclimate

Inactive Publication Date: 2018-09-18
CHINA ACAD OF TRANSPORTATION SCI +1
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Problems solved by technology

Obviously, without the participation of the road transportation industry, the rainwater harvesting technology system in my country is not complete enough
According to the results of literature retrieval, there are few studies on highway rainwater utilization, lack of research on relevant theoretical basis and design technology, and the research on road rainwater collection and comprehensive utilization technology in arid areas can fill this gap, so it is urgent to carry out

Method used

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  • Method for collecting rainwater on highways in arid regions

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Embodiment

[0022] Taking the Ningxia demonstration site as an example, the maximum drainage distance of the side ditch is back-calculated by calculating the design runoff to provide a reference for the selection of the side ditch form. In the following, the hydraulic calculation process of the shallow dish ecological side ditch is analyzed with the width B of the side ditch being 1.5m and the longitudinal slope at the bottom of the ditch being 0.3%.

[0023] (1) Rainfall duration: The rainfall duration is taken as the confluence duration of the design control point, and its value is the sum of the slope confluence duration from the farthest point of the catchment area to the outlet of the side ditch and the confluence duration of the trench pipe in the ditch. Now assume that the rainfall lasts for 10 minutes.

[0024] ⑵ Calculation of the average flow velocity in the side ditch, and the water-passing capacity of the shallow dish-shaped ecological side ditch is calculated according to the...

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Abstract

The invention discloses a method for collecting rainwater on highways in arid regions. The method includes the following steps of (1) according to the maximum drainage distance of side ditches according to the volume of runoff, digging shallow disc-shaped ecological side ditches; (2) flattening the walls of the side ditches; (3) laying waterproof geotechnical cloths on the bottoms of the side ditches; (4) conducting backfilling of soil; (5) laying a layer of cobbles with the diameters of 5-8 cm; (6) scattering grass seeds; (7) conducting nursing management. By adopting the shallow disc-shapedecological side ditches which are smooth in line type, close to nature, reasonable in facture surfaces, capable of saving land and resistant to evaporation, salt and alkali, the economic benefits, thesocial benefits and the ecological benefits are considerable.

Description

technical field [0001] The invention relates to the technical field of rainwater utilization, in particular to a method for collecting rainwater from highways in arid areas. Background technique [0002] Highway pavement has the advantages of high collection efficiency and large area, and is especially suitable for collecting rainwater as a collection surface for rainwater. It is estimated that the total mileage of graded highways in the five provinces of northwest Xinjiang, Inner Mongolia, Gansu, Qinghai, and Ningxia reached 570,000 kilometers by the end of 2013. It has been popularized and applied on highway pavement, and it can collect more than 1.4 million cubic meters of rainwater every year (calculated according to the rainfall of 300 mm and the annual collection rate of 5%), with huge development potential and scale benefits. Obviously, without the participation of the road transportation industry, the technical system of rainwater harvesting in my country is not com...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E03F5/00A01G22/00A01C21/00
Inventor 胡晋茹陈兵张晓峰张峻峰刘涛陈琳张前进伍玉容李元
Owner CHINA ACAD OF TRANSPORTATION SCI
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