CN106976987B - Method for building coupled water quality guarantee for landscape water body in residential community - Google Patents
Method for building coupled water quality guarantee for landscape water body in residential community Download PDFInfo
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Abstract
A landscape water body construction coupling water quality guarantee method is characterized in that waterscape construction means such as drop, turbulence, landscape sand land, mixed flow artificial wetland and the like are added in the residential area landscape water body construction process to strengthen the self-purification capacity of the water body: supplementing dissolved oxygen to the water body in a water drop, turbulent flow and other modes, so that the water body is kept in an oxygen-enriched state all the time, and organic pollutants in the water body are prevented from being decomposed; the landscape sand land and the mixed flow artificial wetland are connected in parallel, so that suspended matters, N, P and other nutrient substances in water are removed, the landscape water body is ensured to have good sensory properties, and water quality guarantee is provided for building a good landscape water environment in residential districts.
Description
Technical Field
The invention belongs to the technical field of water treatment, and particularly relates to a method for building coupled water quality guarantee for a landscape water body in a residential community.
Background
With the development of national economy, the requirements of people on the environmental standards of residential areas are higher and higher. Comfortable, healthy, efficient and beautiful green ecological residential areas become the usual habitation of modern urban residents. Landscape water is used as an important component of community greening and is widely applied by landscape designers, so that a large number of newly-built communities are designed and matched with large-area landscape water bodies such as ponds, fountains and the like. However, due to the existence of large underground garages in populated areas, and from a cost control perspective, the garage roof is rarely covered with soil more than 1.5 m. The objective fact results in that the water depth of landscape water bodies in most residential areas is shallow, the whole water body has no height difference, and the water bodies are not circulated or have extremely poor liquidity and belong to 'dead water' landscape. Because of factors such as urban environmental pollution, atmospheric sedimentation and the like, a large amount of particles, N, P and other nutrient elements are input into the landscape water body, the landscape water body has no self-purification capacity due to the design characteristics, and along with the accumulation of N, P and other nutrient elements in the landscape water body, algae in water are propagated in a large amount, so that the water body is turbid and green, and the transparency is rapidly reduced to influence the sensory properties of the landscape water body. After organic matters are accumulated in the landscape water body, the water body finally turns black and smelly due to insufficient reoxygenation capacity of the water body, and the landscape ornamental value is lost. And the original design of the landscape water body in the residential area is the Nanthill northern Rut.
At present, two common methods for purifying the landscape water body in the residential area are provided: firstly, fresh water (tap water) is adopted to regularly replace raw water in a landscape water body, and the replacement period is 1-3 months. The method needs to consume a large amount of water resources, and is contrary to the idea that China strives to construct a resource-saving and environment-friendly society; firstly, raw water in the landscape water body is subjected to cyclic treatment by adopting a physical and chemical method, the cycle period is generally from two weeks to one month, the method needs to newly build a landscape water body cyclic treatment facility, increases construction investment, needs to arrange a specially-assigned person to take charge of the operation of the treatment facility, and has complex operation and higher operation and maintenance cost.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention aims to provide a method for building and coupling water quality guarantee for the landscape water body in the residential community, wherein waterscape construction means such as drop, turbulence, landscape sand land, mixed flow artificial wetland and the like are added in the process of building the landscape water body in the residential community to strengthen the self-purification capacity of the water body: supplementing dissolved oxygen to the water body in a water drop, turbulent flow and other modes, so that the water body is kept in an oxygen-enriched state all the time, and organic pollutants in the water body are prevented from being decomposed; the landscape sand land and the mixed flow artificial wetland are connected in parallel, so that suspended matters, N, P and other nutrient substances in water are removed, the landscape water body is ensured to have good sensory properties, and water quality guarantee is provided for building a good landscape water environment in residential districts.
In order to achieve the purpose, the invention adopts the technical scheme that:
a method for building coupled water quality guarantee for landscape water in residential districts comprises the following steps:
1) in the process of building the landscape water body in the residential area, dissolved oxygen is supplemented into the water body of the theme waterscape in a drop and turbulence mode, so that the water body is kept in an oxygen-enriched state all the time, and organic pollutants in the water body are prevented from being decomposed;
2) removing suspended matters and nitrogen and phosphorus nutrient substances in water by adopting a mode of connecting landscape sand land and mixed flow artificial wetland in parallel at the tail end of a water body of a theme waterscape;
3) the treated water after passing through the landscape sand land and the mixed flow artificial wetland is pressurized by a circulating lift pump and is supplemented to subject waterscape such as drop, turbulence and the like as a water source.
The water drop is realized through rockery or a water drop wall, and the water drop height difference is more than 2.0 m; the time of the turbulent oxygenation process is more than or equal to 5 min; the water depth of the turbulent flow process is not more than 30 cm.
The area of the landscape sand land is not less than 8 per mill of the area of the water surface of the landscape water body.
The total thickness of the landscape sand field is 1300mm, and the landscape sand field is a medium sand layer which is 1000mm thick and has the grain diameter of 0.8-2.0 mm from top to bottom; a graded gravel layer with the thickness of 300mm and the particle size of 20-50 mm; the design flow rate is 18-25 m/d, and after the sand is used for half a year, medium sand with the surface of 300mm is removed, and new sand is paved again to recover the use function.
The area of the artificial wetland is not less than 2% of the water surface area of the landscape water body.
The total thickness of the artificial wetland is 1500mm, and the artificial wetland comprises a soil layer with the thickness of 600mm, a zeolite layer with the thickness of 600mm and a pebble layer with the thickness of 300mm from top to bottom; the wetland type is mixed flow, the planted aquatic plants are cattail or reed, and the aquatic plants are harvested in winter.
The invention can respectively realize the change of the circulating water treatment amount of the landscape sand land and the artificial wetland between 0 and 100 percent through the switching of the water inlet valve according to the water quality condition of the landscape water body and the sensory properties (turbidity, chroma and the like) of the landscape water body.
The processing amount variation basis is as follows:
when the water body in summer tends to turn green, a large amount of water is introduced into the landscape sand land to be filtered so as to quickly improve the sensory properties of the landscape sand land, and then a large amount of water is introduced into the artificial wetland so as to reduce the nitrogen and phosphorus nutrients in the artificial wetland and achieve the aim of stabilizing the water quality;
in winter, according to the pipe sensing condition of the landscape water body, 70-80% of water is introduced into the landscape sand, the rest 20-30% of water enters the artificial wetland, and the circulating water volume of the lift pump is properly increased.
The water body self-falling, turbulent flow to the theme waterscape and then to the landscape sand land and the mixed flow artificial wetland are all completed through the gravity self-flowing of the water flow, the treated water passing through the landscape sand land and the mixed flow artificial wetland is collected through a landscape sand land or a sump at the tail end of the artificial wetland, and is pressurized by a lifting pump and sent to the links of water falling and turbulent flow, so that the whole water body circulation is completed.
The invention can inject fresh water into landscape water regularly to make up for the basic loss caused by water infiltration and evaporation.
Compared with the prior art, the invention optimizes and combines the landscape sand land and the artificial wetland by using landscape construction techniques such as rockery, water drop wall and the like and combining the purification mechanism of the landscape sand land and the artificial wetland on the water quality, strengthens the self-purification capability of the landscape water body, is easy to adopt for newly-built landscape water bodies, and is simple and easy to reform the existing landscape water bodies.
The method is simple, and the ideal landscape water body circulating treatment effect can be obtained without greatly increasing the construction investment and the operation cost.
According to the method, professional maintenance is not needed, and the landscape sand surface layer is only shoveled and re-paved twice a year; the artificial wetland is harvested once a year to achieve the target.
Drawings
FIG. 1 is a flow chart of the present invention.
Detailed Description
The embodiments of the present invention will be described in detail below with reference to the drawings and examples.
As shown in figure 1, the invention adopts the forms of drop, turbulence and the like to increase dissolved oxygen in water, thereby preventing organic pollutants in the water body from being decomposed and further causing water quality deterioration; the landscape sand land and the mixed flow artificial wetland are connected in parallel to treat suspended matters, organic matters, nitrogen, phosphorus and other nutrient elements in water; and arranging circulating water pumps at the tail ends of the landscape sand land and the artificial wetland to lift water to the initial end of the landscape water body for circulation. The specific process is as follows:
firstly, adopting a landscape construction method of rockery and a water drop wall at the initial end of a landscape water body to ensure that an initial water source entering the landscape water body has certain potential energy, supplementing oxygen to the water by virtue of turbulence in the flow process of the water flowing to a subject water body, and ensuring that the step is completely completed by gravity flow of the water; wherein the height of the water outlet point of the rockery and the water drop wall is more than or equal to 2.0m away from the plane of the residential area, and the duration time t of the turbulent flow falling process is more than or equal to 5 min.
Secondly, arranging a landscape sand land and an artificial wetland at the tail end of the subject water body in parallel, removing suspended matters and organic matters in water through the interception effect of the landscape sand land, and removing nutrient substances such as nitrogen and phosphorus in the water through the physicochemical-biochemical synergistic effect of the artificial wetland so as to ensure good water quality of the water body; wherein, the area of the landscape sand land is 8 per mill of the water surface area of the theme waterscape, and the area of the artificial wetland is 2 percent of the waterscape area. According to the water quality condition of the landscape water body and the sensory properties of the landscape water body, the circulating water treatment capacity of the landscape sand land and the artificial wetland can be respectively changed between 0 percent and 100 percent through the switching of the water inlet valve.
The total thickness of the landscape sand field is 1600mm, and the landscape sand field is a middle sand layer with the thickness of 1200mm and the grain diameter of 0.8-2.0 mm from top to bottom; a graded gravel layer with the thickness of 400mm and the particle size of 20-50 mm; the designed flow rate is 18-25 m/d, the water source in the landscape water body can be processed in a circulating way within 40 days at the fastest speed, and the service function can be recovered by shoveling medium sand with the surface of 300mm after the landscape water body is used for half a year and paving new sand again.
The total thickness of the artificial wetland is 1500mm, and the artificial wetland comprises a 600mm thick soil layer, a 600mm thick zeolite layer and a 300mm thick pebble layer from top to bottom; the wetland type is mixed flow, the planted aquatic plants are cattail or reed, and the aquatic plants are harvested in winter.
Properly adjusting the water inflow of the landscape sand land and the artificial wetland according to the sensory properties of the landscape water body, such as: when the water body in summer tends to turn green, a large amount of water is introduced into the landscape sand land to be filtered so as to quickly improve the sensory properties of the landscape sand land, and then a large amount of water is introduced into the artificial wetland so as to reduce the nitrogen and phosphorus nutrients in the artificial wetland and achieve the aim of stabilizing the water quality; in winter, all water is introduced into the landscape sand and the circulating treatment amount is properly increased, so that the good water quality of the water body can be ensured.
Finally, the treated water is collected by a water collecting pit at the tail end of the landscape sand land or the artificial wetland and is pressurized by a lifting pump and sent to landscape rockery and a water drop wall, and the whole water body circulation is completed. Meanwhile, fresh water is injected into the landscape water body regularly to make up for water loss caused by water infiltration, evaporation and the like.
Claims (8)
1. A method for building coupled water quality guarantee for landscape water in residential areas is characterized by comprising the following steps:
1) in the process of building the landscape water body in the residential area, dissolved oxygen is supplemented into the water body of the theme waterscape in a drop and turbulence mode, so that the water body is kept in an oxygen-enriched state all the time, and organic pollutants in the water body are prevented from being decomposed;
2) removing suspended matters and nitrogen and phosphorus nutrient substances in water by adopting a mode of connecting landscape sand land and mixed flow artificial wetland in parallel at the tail end of a water body of a theme waterscape;
3) pressurizing the treated water after passing through the landscape sand land and the mixed flow artificial wetland by using a circulating lift pump, and supplementing the water to a drop and turbulent flow theme waterscape as a water source;
the method is characterized in that the circulating water treatment capacity of the landscape sand land and the artificial wetland is respectively changed between 0 percent and 100 percent through switching of the water inlet valve according to the water quality condition of the landscape water body and the sensory properties of the landscape water body, and the change of the treatment capacity is based on:
when the water body in summer tends to turn green, a large amount of water is introduced into the landscape sand land to be filtered so as to quickly improve the sensory properties of the landscape sand land, and then a large amount of water is introduced into the artificial wetland so as to reduce the nitrogen and phosphorus nutrients in the artificial wetland and achieve the aim of stabilizing the water quality;
in winter, according to the pipe sensing condition of the landscape water body, 70-80% of water is introduced into the landscape sand, the rest 20-30% of water enters the artificial wetland, and the circulating water volume of the lift pump is increased.
2. The method for building the coupled water quality assurance for the landscape water body of the residential quarter according to claim 1, wherein the water drop is realized through a rockery or a water drop wall, and the water drop height difference is more than 2.0 m; the time of the turbulent oxygenation process is more than or equal to 5 min; the water depth of the turbulent flow process is not more than 30 cm.
3. The method for building the coupled water quality assurance for the landscape water body of the residential quarter according to claim 1, wherein the area of the landscape sand land is not less than 8% o of the area of the water surface of the landscape water body.
4. The method for building the coupling water quality guarantee for the landscape water body of the residential quarter according to claim 1 or 3, characterized in that the total thickness of the landscape sand land is 1300mm, and the landscape sand land is a medium sand layer with the thickness of 1000mm and the grain diameter of 0.8-2.0 mm from top to bottom; a graded gravel layer with the thickness of 300mm and the particle size of 20-50 mm; the design flow rate is 18-25 m/d, and after the sand is used for half a year, medium sand with the surface of 300mm is removed, and new sand is paved again to recover the use function.
5. The method for building the coupled water quality assurance for the scenic water body of the residential quarter according to claim 1, wherein the area of the artificial wetland is not less than 2% of the water surface area of the scenic water body.
6. The method for building the coupled water quality assurance for the landscape water body of the residential quarter according to claim 1 or 5, wherein the total thickness of the constructed wetland is 1500mm, and the constructed wetland comprises a 600mm thick soil layer, a 600mm thick zeolite layer and a 300mm thick pebble layer from top to bottom; the wetland type is mixed flow, the planted aquatic plants are cattail or reed, and the aquatic plants are harvested in winter.
7. The method for building the coupling water quality guarantee for the landscape water body of the residential quarter according to claim 1, wherein the water body self-falling, turbulent flow to the theme waterscape and then to the landscape sand land and the mixed flow artificial wetland are all completed by the gravity flow of water flow, the treated water passing through the landscape sand land and the mixed flow artificial wetland is collected by a tail end collecting pit of the landscape sand land or the artificial wetland, and is pressurized by a lifting pump and sent to the links of falling and turbulent flow, so that the whole water body circulation is completed.
8. The method for building the coupling water quality assurance for the scenic water body of the residential quarter as claimed in claim 1, wherein fresh water is periodically injected into the scenic water body to make up for the basic loss caused by the infiltration and evaporation of the water body.
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102351385A (en) * | 2011-09-14 | 2012-02-15 | 上海交通大学 | Small-sized waterscape wetland system and construction method thereof |
| CN102557269A (en) * | 2012-03-01 | 2012-07-11 | 复旦大学 | Landscape park type surface runoff treatment system |
| CN102718367A (en) * | 2012-07-09 | 2012-10-10 | 深圳市高山水园林环境艺术有限公司 | Method and system for ecological wetland treatment of landscape water |
| CN102923906A (en) * | 2012-10-24 | 2013-02-13 | 天津大学 | Campus landscape water-body water-quality maintaining and self-purifying system integrating functions of landscape and biological ecological restoration |
| CN104310708A (en) * | 2014-10-22 | 2015-01-28 | 河南恒安环保科技有限公司 | Application method of drop aeration-high depth composite undercurrent constructed wetland technology in rural domestic sewage treatment |
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- 2017-05-04 CN CN201710306373.5A patent/CN106976987B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102351385A (en) * | 2011-09-14 | 2012-02-15 | 上海交通大学 | Small-sized waterscape wetland system and construction method thereof |
| CN102557269A (en) * | 2012-03-01 | 2012-07-11 | 复旦大学 | Landscape park type surface runoff treatment system |
| CN102718367A (en) * | 2012-07-09 | 2012-10-10 | 深圳市高山水园林环境艺术有限公司 | Method and system for ecological wetland treatment of landscape water |
| CN102923906A (en) * | 2012-10-24 | 2013-02-13 | 天津大学 | Campus landscape water-body water-quality maintaining and self-purifying system integrating functions of landscape and biological ecological restoration |
| CN104310708A (en) * | 2014-10-22 | 2015-01-28 | 河南恒安环保科技有限公司 | Application method of drop aeration-high depth composite undercurrent constructed wetland technology in rural domestic sewage treatment |
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