CN113739868B - Real-time early warning and monitoring system and method for ponding of natural sponge facility - Google Patents
Real-time early warning and monitoring system and method for ponding of natural sponge facility Download PDFInfo
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- CN113739868B CN113739868B CN202111060741.5A CN202111060741A CN113739868B CN 113739868 B CN113739868 B CN 113739868B CN 202111060741 A CN202111060741 A CN 202111060741A CN 113739868 B CN113739868 B CN 113739868B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F23/00—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume, or surface-area of porous materials
- G01N15/08—Investigating permeability, pore-volume, or surface area of porous materials
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- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B21/00—Alarms responsive to a single specified undesired or abnormal condition and not otherwise provided for
- G08B21/02—Alarms for ensuring the safety of persons
- G08B21/10—Alarms for ensuring the safety of persons responsive to calamitous events, e.g. tornados or earthquakes
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume, or surface-area of porous materials
- G01N15/08—Investigating permeability, pore-volume, or surface area of porous materials
- G01N2015/0813—Measuring intrusion, e.g. of mercury
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
Abstract
The invention discloses a real-time early warning and monitoring system and a method for ponding of a natural sponge facility, wherein a real-time early warning and monitoring platform in the system comprises a plurality of stages of monitoring units which are longitudinally paved in the sponge facility, and the longitudinal distance of the plurality of stages of monitoring units is gradually decreased; each monitoring unit comprises a plurality of fiber bragg grating sensor groups connected in parallel, the distances between adjacent fiber bragg grating sensors in a single branch are equal, and the distance between the adjacent branches is larger than the distance between the adjacent fiber bragg grating sensors in the single branch. The invention measures the rain infiltration rate in soil by utilizing an optical fiber sensing technology, thereby indirectly reflecting the ponding condition in the natural sponge facilities in the current city and making corresponding early warning measures.
Description
Technical Field
The invention relates to a sponge city technology and an optical fiber sensing technology, in particular to a real-time early warning and monitoring system and method which can be applied to city natural sponge facilities.
Background
In the current sponge city construction process, in order to realize four functions of absorbing, penetrating, purifying and storing rainwater, the rainwater recycling rate in the city is improved, and the probability of flood disaster occurrence is reduced. Various basic sponge facilities such as pervious concrete, ceramic pervious bricks, utility tunnel, concave greenbelt, grass planting ditch are greatly popularized in the sponge city construction process, so that the rainfall runoff cutting rate and the like are greatly improved. However, in the actual rainfall process, sponge facilities such as a concave green land and a grass planting ditch which utilize natural sponge bodies to absorb and utilize rainwater cannot effectively exert the capability of the facilities for absorbing the rainwater, water accumulation often occurs, rainwater overflows in severe cases, disasters such as road collapse, landslide and debris flow occur, and different degrees of influence are brought to residents.
Disclosure of Invention
In order to realize real-time monitoring and early warning of natural sponge facility ponding in cities, timely response is carried out when the natural sponge facility ponding phenomenon occurs, surface runoff is reduced, urban waterlogging is relieved, and the real-time early warning and monitoring system of the natural sponge facility ponding is provided.
The technical scheme adopted by the invention is as follows:
the real-time early warning and monitoring platform for the ponding of the natural sponge facility comprises a plurality of stages of monitoring units which are longitudinally paved in the sponge facility, wherein the longitudinal distance of the plurality of stages of monitoring units is gradually decreased;
each monitoring unit comprises a plurality of fiber bragg grating sensor groups connected in parallel, the distances between adjacent fiber bragg grating sensors in a single branch are equal, and the distance between the adjacent branches is larger than the distance between the adjacent fiber bragg grating sensors in the single branch.
By adopting the technical scheme, a certain gap is reserved between the outermost fiber grating sensor in each monitoring unit and the edge of the sponge facility.
By adopting the technical scheme, the gap is not less than 75cm.
By adopting the technical scheme, the interval between two adjacent branches in one monitoring unit is not less than 1.5m.
By adopting the technical scheme, the distance between adjacent fiber bragg grating sensors in each branch is not less than 1m.
By adopting the technical scheme, the real-time early warning and monitoring platform is arranged in the red soil layer.
According to the technical scheme, the device is particularly provided with longitudinal three-stage monitoring units, and the distance from top to bottom to the first layer of earthing is 18cm, 30cm and 40cm respectively.
The invention also provides a real-time early warning and monitoring system for the ponding of the natural sponge facility, which comprises a soil water seepage monitoring platform, a computer central control platform, a comprehensive display platform and an early warning response platform;
the soil water seepage monitoring platform is the real-time early warning monitoring platform according to the technical scheme; when rainfall occurs in the city, measuring the underwater seepage rate of the rainfall in the soil through a multi-stage monitoring unit, and inputting the underwater seepage rate into a computer central control platform;
the computer central control platform is connected with the soil water seepage monitoring platform, and acquires rainfall intensity information of a certain area within the current rainfall duration by utilizing the Internet, and the computer central control platform obtains current ponding information through analysis and processing;
the comprehensive display platform is connected with the computer central control platform, and when the accumulated water exceeds a certain threshold value, early warning information is generated;
the early warning response platform is connected with the comprehensive display platform and carries out early warning according to the received early warning information.
The invention provides a real-time early warning and monitoring method for natural sponge facility ponding, which is based on the real-time early warning and monitoring system for natural sponge facility ponding, and specifically comprises the following steps:
the multi-stage monitoring unit measures the underwater seepage rate of the rain in the soil, and then inputs the measured underwater seepage rate into the computer central control platform;
the computer central control platform is used as the rainwater limit infiltration rate V before the water accumulation occurs under certain rainfall intensity according to the rainwater infiltration rate when the water accumulation occurs in the current natural sponge facility I In this way V I Is the threshold value and the current rain water seepage rate V measured by the soil seepage monitoring platform Infiltration process Comparing to determine the current ponding condition; when V is Infiltration process ＞V I When the rain seepage rate is higher than the intensity of heavy rain, the sponge facility works normally, and the runoff control efficiency is exerted;
when V is Infiltration process =V I At the moment, the infiltration rate of the rainwater is equal to the intensity of the heavy rain, and the sponge facilities normally exert the runoff control efficiency;
when V is Infiltration process ＜V I When the infiltration rate is lower than the intensity of heavy rain, the infiltration rate in the soil can not meet the current rainfall intensity in the rainfall process at the stage, and the sponge facility starts to generate surface ponding; at the moment, the comprehensive display platform generates ponding early warning information, and early warning is carried out through the early warning response platform.
The invention has the beneficial effects that: the invention measures the rain infiltration rate in soil by utilizing the optical fiber sensing technology, and the multiple parallel branches can be applied and measured in most sponge facility types, thus being suitable for large-area popularization in sponge areas, reflecting the ponding condition in the natural sponge facilities in the current city and being convenient for making corresponding early warning measures. Meanwhile, in the longitudinal multistage monitoring of the soil, decision-making staff can accurately monitor the soil at different levels in the facility in real time, and know the rainwater penetration condition of the soil at each layer so as to obtain the overall average rainwater penetration rate of the structure.
Drawings
The invention will be further described with reference to the accompanying drawings and examples, in which:
FIG. 1 is a graph showing the underwater infiltration rate of soil layers with time:
FIG. 2 is a schematic diagram of a real-time early warning and monitoring system for ponding in a natural sponge facility according to an embodiment of the invention;
FIG. 3 is a schematic diagram of a real-time early warning and monitoring platform according to an embodiment of the present invention;
FIG. 4 is a diagram of the live monitoring system according to an embodiment of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present invention more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.
In order to realize real-time monitoring and early warning of natural sponge facility ponding in cities, timely response is carried out when the natural sponge facility ponding phenomenon occurs, surface runoff is reduced, urban waterlogging is relieved, and the rain underwater seepage rate in soil is measured by utilizing an optical fiber sensing technology, so that the ponding condition in the natural sponge facility in the current city is indirectly reflected, and corresponding early warning measures are made.
For natural sponge, the soil layer mainly bears the function of seeping and storing rainwater. The rainwater has three stages in the soil infiltration process, namely infiltration, infiltration and infiltration stages, wherein the water content in the soil is low in the infiltration stage, and the infiltration rainwater is mainly subjected to molecular force; the imbibition stage takes capillary force and gravity as main materials, water moves irregularly among pores and gradually fills the soil pores until approaching or reaching saturation; and a infiltration stage, in which the content of the rainwater in the soil is saturated, and the rainwater moves downwards under the action of gravity. According to the related data, the rainwater infiltration rate in the natural sponge body is changed regularly along with time, and is continuously reduced along with the continuous increase of time, and finally, the rainwater infiltration rate in the natural sponge facility is approximately a constant value.
The real-time early warning and monitoring platform for the ponding of the natural sponge facility comprises a plurality of stages of monitoring units which are longitudinally paved in the sponge facility, wherein the longitudinal distance of the plurality of stages of monitoring units is gradually decreased; each monitoring unit comprises a plurality of fiber bragg grating sensor groups connected in parallel, the distances between adjacent fiber bragg grating sensors in a single branch are equal, and the distance between the adjacent branches is larger than the distance between the adjacent fiber bragg grating sensors in the single branch.
Further, a certain gap is reserved between the outermost fiber grating sensor in each monitoring unit and the edge of the sponge facility. In a preferred embodiment of the present invention, the gap is not less than 75cm.
The real-time early warning monitoring platform can monitor the temperature change of soil layers before and after the natural sponge body seeps water by using the principle that different signals are output by utilizing the refractive index of the refractive index temperature sensitive element of a measuring point through a method for monitoring the rainwater seepage rate of the natural sponge body in the sponge city sponge facility in the patent application number CN201810380169.2, and the natural sponge facility with a certain thickness is paved with sensors, and the rainwater seepage rate in the natural sponge facility can be measured under a certain rainfall intensity and within a certain time according to the physical quantities such as the soil layer thickness, the rainwater seepage time and the like.
For measuring the rain infiltration rate of a multistage sensor, establishing a related mathematical model according to the reaction time difference of front and rear temperature sensitive elements and the longitudinal distance of the temperature sensitive elements to obtain the infiltration rate, and when the mathematical model is established, preferably combining a large amount of real infiltration monitoring data in each soil layer, linearly fitting the soil thickness and the temperature difference response duration between each layer, and according to different physicochemical properties (such as water permeability) of the soil of each layerVolume weight, etc.) to introduce parameters into the model to optimize the model to further enhance R 2 Ensure R 2 > 0.99. After establishing a mathematical model to obtain different rain water infiltration rates in the soil layers of the individual stages, the soil layers (H 1 、H 2 、H 3 、H 4 、H 5 ) Total soil layer thickness (H) of occupied structure Total (S) ) The ratio is further calculated to lay the rainwater infiltration rate of the local structure of the monitoring system. In order to further understand the property change of the soil layer in the rainfall process, a linear fitting mathematical model of the soil layer runoff pollution control rate, the soil layer runoff reduction rate and the infiltration rate is established so as to evaluate the real-time condition of each level of soil layer.
The calculation process is as follows: respectively utilizing different mathematical models suitable for each soil layer to obtain the rainwater penetration rate V of each soil layer 1 、V 2 、V 3 、V 4 、V 5 . On the basis, the rainwater infiltration rate in the whole structure is obtained by using the following formula:
under similar hydrologic conditions in the same area, the physical and chemical properties of the soil are stable, when rainfall occurs, the permeation rate in the soil has a certain relation with the water content, the water content of the soil is continuously increased along with the continuous progress of the rainfall, the permeation rate is reduced, when a certain time, the phenomenon of water accumulation on the surface of the soil is often caused, and along with the time, the permeation rate shows a stable change rule (shown in figure 1) in the process, so a monitoring means for the phenomenon of water accumulation on the surface of the soil by adopting the permeation rate is proposed for the first time.
Under certain rainfall intensity, the rainwater infiltration rate when the ponding occurs in the current natural sponge facility is measured by using an optical fiber rainwater infiltration monitoring system and is used as the rainwater limit infiltration rate V before the ponding occurs under certain rainfall intensity I In this way V I Is the threshold value, and is compared with the current rain infiltration rate measured by the optical fiber monitoring system, thereby determiningAnd determining the current ponding condition.
Thus, an early warning system is constructed, and the specific early warning system is as follows, V is set I Is the ultimate rain infiltration rate under the current storm intensity, V Infiltration process Is the current infiltration rate of the rainwater in the soil.
When V is Infiltration process ＞V I At the moment, the rain water seepage rate is higher than the storm intensity, and in the rainfall process at the stage, the soil can quickly infiltrate into the rain water to prevent the rain water from forming surface runoff, and the sponge facility can normally work to exert the runoff control efficiency;
when V is Infiltration process =V I At this time, the infiltration rate of the rainwater is equal to the intensity of the storm, the infiltration rate of the soil is equal to the intensity of the rainfall in the rainfall process of the stage, the sponge facility can normally exert the runoff control efficiency in the rainfall stage before the point, and the working efficiency of the sponge facility reaches the design limit when the point is reached;
when V is Infiltration process ＜V I At this time, the infiltration rate is lower than the intensity of the heavy rain, and in the rainfall process at this stage, the infiltration rate in the soil cannot meet the current rainfall intensity, and the sponge facility starts to produce surface water. At this time, the early warning of water accumulation in the monitoring area can be sent out.
As shown in fig. 2, the real-time early warning and monitoring of the ponding of the natural sponge facility in the embodiment of the invention comprises a soil water seepage monitoring platform, a computer central control platform, a comprehensive display platform and an early warning response platform. The computer central control platform is applied to the soil water seepage monitoring platform and the internet platform to comprehensively process the rain water seepage rate data in the soil and relevant current rainfall intensity information, and the comprehensive display platform is connected with the computer central control platform to display the current urban sponge facility ponding condition. The early warning response platform is arranged behind the computer central control platform and is used for sending out early warning instructions.
When rainfall occurs in a city, a monitoring instrument arranged in soil acquires the underwater seepage rate of the rainfall in the soil and then inputs the underwater seepage rate into a computer central control platform layer, meanwhile, the computer central control platform acquires rainfall intensity information in a certain area within the current rainfall duration by utilizing the Internet, after the two pieces of information are integrated, the computer central control platform processes the two pieces of information to obtain corresponding current ponding information, the corresponding current ponding information is displayed on an integrated display platform, and when the situation of ponding is judged to be worsened, certain early warning information is sent to be transmitted into an early warning response platform for early warning.
In one embodiment of the invention, in the range of taking every 3m multiplied by 4m (12 square meters) as a monitoring unit, the optical fiber sensor is laid in a double-path parallel manner, the interval between two branches is 1.5m, and the distance between the left side and the right side of the branch is not less than 75cm from the outer edge of a sponge facility; a single branch is laid once every 1m in parallel, and is composed of an upper fiber bragg grating sensor and a lower fiber bragg grating sensor, as shown in fig. 3.
Taking red soil layer as an example, when the sensor is paved, in order to ensure that the obtained result is more accurate, the distance between the first level and the second level is limited when the sensor is longitudinally paved, and the paving distance is different mainly because the physical and chemical properties such as soil compactness, porosity and the like are changed along with the increasing of depth in the soil layer, so that the infiltration rate of rainwater in the soil layers with different depths is changed, and according to basic experiment detection, the southern multi-surface red soil layer red soil has the infiltration coefficient of 5 multiplied by 10 at most -2 cm/s, and the soil permeability coefficient is reduced to 4×10 when the depth is increased -2 cm/s, the permeability coefficient is about 3.5X10 when the depth reaches 40-50cm -2 cm/s. In order to meet the monitoring precision of the sensors, when the first-stage and second-stage sensors are paved, the first-layer earthing thickness is about 3cm, the infiltration requirement of rainwater in 1 minute is met, and then, in the second-stage, third-stage and fourth-stage paving, the response time of each 5min of the monitoring system is met, and the sensors are paved at depths of 18cm, 30cm and 40cm respectively.
Depth determination:
in the monitoring of the non-point source, because the water permeability rate of the surface soil is fixed, the temperature sensor is a rod-shaped sensitive element, in the unidirectional serial monitoring, the monitoring range before and after the rod-shaped is tested to be (0.5+/-0.25 and m), and because under different terrains, the detection error is larger, in order to ensure the precision, the interval (1.5+/-0.5 m) is adopted before and after the sensor, the rod-shaped sensor can effectively detect the parallel interval to be (0.75+/-0.5 m), so that each parallel branch line adopts the arrangement scheme of the interval (1.5+/-0.5 m).
Example 1
When rainfall occurs in a city, the soil water seepage rate under the rainfall intensity is 55mm/d, and the soil water seepage rate is found by a certain measurement in an image of the change of the soil water seepage rate with time under the rainfall intensity: when the soil type of the area is sandy shale red soil (the soil is acidic, the pH is more than 5.0-5.5, the organic matter content is low, the cation exchange capacity is low, the total porosity of the soil is 47.2 percent on average), when the soil infiltration rate reaches 0.62cm/min, the natural sponge facility is in a water saturation state and is between a ponding state and a complete infiltration state, and the rainwater limit infiltration rate V is set in a computer central control platform I =0.62cm/min。
In the early stage of rainfall, the soil has stronger underwater infiltration capacity, and can finish infiltration of rainwater which falls to the permeable layer of natural sponge facility, V in the stage Infiltration process ＜V I (0.62 cm/min), no water accumulation is generated at the moment, and the natural sponge facility can exert the rain seepage effect.
As shown in fig. 4, as rainfall progresses, the soil water seepage rate monitored by the soil water seepage monitoring platform is continuously reduced, and when V Infiltration process ＜V I When the water accumulation is generated on the red soil surface layer in the natural sponge facility at the time of (0.62 cm/min), the comprehensive display platform is utilized to intuitively display the early warning condition of the facility, and on duty personnel can use the computer central control platform to perform corresponding water accumulation early warning to perform corresponding deployment.
Example 2
When rainfall occurs in a city, at the rainfall intensity of 75mm/d, the soil water seepage rate under the rainfall intensity is found by a certain measurement in the time-varying image: when the soil type of the area is red soil and the soil infiltration rate reaches 0.69cm/min, the natural sponge facility is in a water saturation state and is between the ponding state and the complete infiltration state, and the rainwater limit infiltration rate V is set in the computer central control platform I =0.69cm/min。
In early stage of rainfall, soil rain water seeps energyThe force is stronger, the rainwater which falls to the water permeable layer surface of the natural sponge facility can be infiltrated downwards, V in the stage Infiltration process ＜V I (0.69 cm/min), no water accumulation is generated at the moment, and the natural sponge facility can exert the rain seepage effect.
Along with the rainfall in-process, the soil infiltration rate that soil infiltration monitoring platform monitored constantly reduces, when V Infiltration process ＜V I When the water accumulation is generated on the red soil surface layer in the natural sponge facility at the time of (0.69 cm/min), the comprehensive display platform is utilized to intuitively display the early warning condition of the facility, and on duty personnel can use the computer central control platform to perform corresponding water accumulation early warning to perform corresponding deployment.
Example 3
When rainfall occurs in a city, the soil water seepage rate under the rainfall intensity is 55mm/d, and the soil water seepage rate is found by a certain measurement in an image of the change of the soil water seepage rate with time under the rainfall intensity: when the soil type of the area is brown soil (the soil is thinner, the field water holding capacity is high and reaches 25% -30%, the water holding performance is good, the surface soil layer is sandy loam or loam sandy loam, the middle section of the section is silty loam), when the soil infiltration rate reaches 0.56cm/min, the natural sponge facility is in a water saturation state and is between ponding and complete infiltration states, and the rainwater limit infiltration rate V is set in the computer central control platform I =0.56cm/min。
In the early stage of rainfall, the soil has stronger underwater infiltration capacity, and can finish infiltration of rainwater which falls to the permeable layer of natural sponge facility, V in the stage Infiltration process ＜V I (0.56 cm/min), no water accumulation is generated at the moment, and the natural sponge facility can exert the rain seepage effect.
Along with the rainfall in-process, the soil infiltration rate that soil infiltration monitoring platform monitored constantly reduces, when V Infiltration process ＜V I When the water accumulation is generated on the red soil surface layer in the natural sponge facility at the time of (0.56 cm/min), the comprehensive display platform is utilized to intuitively display the early warning condition of the facility, and on duty personnel can use the computer central control platform to perform corresponding water accumulation early warning to perform corresponding deployment.
It will be understood that modifications and variations will be apparent to those skilled in the art from the foregoing description, and it is intended that all such modifications and variations be included within the scope of the following claims.
Claims (9)
1. The real-time early warning and monitoring platform for the ponding of the natural sponge facility is characterized by comprising a plurality of stages of monitoring units which are longitudinally paved in the sponge facility, wherein the longitudinal distance of each of the plurality of stages of monitoring units is gradually decreased;
each monitoring unit comprises a plurality of fiber bragg grating sensor groups connected in parallel, the distances between adjacent fiber bragg grating sensors in a single branch are equal, and the distance between the adjacent branches is larger than the distance between the adjacent fiber bragg grating sensors in the single branch.
2. The real-time early warning and monitoring platform for natural sponge facility ponding according to claim 1, wherein a certain gap is reserved between the outermost fiber bragg grating sensor in each monitoring unit and the edge of the sponge facility.
3. The real-time early warning and monitoring platform for ponding of natural sponge facilities according to claim 2, wherein the gap is not less than 75cm.
4. The real-time early warning and monitoring platform for ponding in a natural sponge facility according to claim 1, wherein the interval between two adjacent branches in one monitoring unit is not less than 1.5m.
5. The real-time early warning and monitoring platform for ponding in a natural sponge facility according to claim 1, wherein the distance between adjacent fiber bragg grating sensors in each branch is not less than 1m.
6. The real-time early warning and monitoring platform for natural sponge facility ponding according to claim 1, wherein the real-time early warning and monitoring platform is arranged in red soil layer.
7. The real-time early warning and monitoring platform for natural sponge facility ponding according to claim 6, wherein the platform is specifically provided with longitudinal three-stage monitoring units, and the distance from top to bottom to the first layer of earthing is 18cm, 30cm and 40cm respectively.
8. The real-time early warning and monitoring system for the ponding of the natural sponge facility is characterized by comprising a soil water seepage monitoring platform, a computer central control platform, a comprehensive display platform and an early warning response platform;
the soil water seepage monitoring platform is the real-time early warning monitoring platform according to any one of claims 1 to 7; when rainfall occurs in the city, measuring the underwater seepage rate of the rainfall in the soil through a multi-stage monitoring unit, and inputting the underwater seepage rate into a computer central control platform;
the computer central control platform is connected with the soil water seepage monitoring platform, and acquires rainfall intensity information of a certain area within the current rainfall duration by utilizing the Internet, and the computer central control platform obtains current ponding information through analysis and processing;
the comprehensive display platform is connected with the computer central control platform, and when the accumulated water exceeds a certain threshold value, early warning information is generated;
the early warning response platform is connected with the comprehensive display platform and carries out early warning according to the received early warning information.
9. The real-time early warning and monitoring method for the natural sponge facility ponding is characterized by specifically comprising the following steps of:
the multi-stage monitoring unit measures the underwater seepage rate of the rain in the soil, and then inputs the measured underwater seepage rate into the computer central control platform;
the computer central control platform is used as the rainwater limit infiltration rate V before the water accumulation occurs under certain rainfall intensity according to the rainwater infiltration rate when the water accumulation occurs in the current natural sponge facility I In this way V I Is the threshold value and the current rain water seepage rate V measured by the soil seepage monitoring platform Infiltration process Comparing to determine the current ponding condition; when V is Infiltration process ＞V I When the rain seepage rate is higher than the intensity of heavy rain, the sponge facility works normally, and the runoff control efficiency is exerted;
when V is Infiltration process =V I At the moment, the infiltration rate of the rainwater is equal to the intensity of the heavy rain, and the sponge facilities normally exert the runoff control efficiency;
when V is Infiltration process ＜V I When the infiltration rate is lower than the intensity of heavy rain, the infiltration rate in the soil can not meet the current rainfall intensity in the rainfall process at the stage, and the sponge facility starts to generate surface ponding; at the moment, the comprehensive display platform generates ponding early warning information, and early warning is carried out through the early warning response platform.
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