CN117235410A - Benefit evaluation system and method for full life cycle of combined LID facility - Google Patents
Benefit evaluation system and method for full life cycle of combined LID facility Download PDFInfo
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Abstract
The application discloses a benefit evaluation system and a benefit evaluation method for a full life cycle of a combined LID facility, wherein the benefit evaluation system comprises a carbon emission accounting module, a rainfall flood control calculation module and a carbon emission intensity calculation module; the carbon emission accounting module calculates to obtain annual average carbon emission of the combined LID facility, and the rainfall flood control calculation module calculates to obtain annual runoff total control quantity of the combined LID facility; the carbon emission intensity calculation module calculates the ratio of the annual average carbon emission of the combined LID facility to the annual runoff total control quantity of the combined LID facility to obtain the annual runoff total control quantity carbon emission intensity of the combined LID facility; and the method evaluates whether the combined LID facilities meet the policies of carbon emission reduction and carbon neutralization according to the carbon emission intensity, and can calculate the value of the annual runoff total control quantity carbon emission intensity of different combined LID facilities in different areas at the same time, thereby accurately and quantitatively evaluating the benefit degree of different combined LID facilities in different areas.
Description
Technical Field
The application relates to the field of sponge city construction, in particular to a benefit evaluation system and method for a full life cycle of a combined LID facility.
Background
In the context of rapid urban and climate change, urban water problems are becoming more serious, and urban water management strategies aim to improve the toughness of cities to environmental changes by integrating LID (Low impact development ) facilities, pipe network systems and receiving bodies of water. Existing studies have demonstrated that LID facilities provide good benefits in terms of carbon sequestration and carbon sequestration.
With the development of recent years, the post-evaluation period of sponge city construction in China has come, and the evaluation of flood control and disaster reduction benefits of LID facilities, construction cost of LID facilities, environmental benefits of LID facilities and the like has attracted a great deal of attention. There are many methods for evaluating the benefit of the LID facility, for example, from the aspects of economy, environment and the like, and a certain benefit evaluation can be performed on the LID facility.
However, the above-described benefit evaluation method in the related art has the following problems: 1) In the using process of the LID facility, a certain amount of carbon dioxide can be generated and discharged, and the existing evaluation method is gradually inconsistent with the policy requirements due to the fact that the carbon discharge and other factors are not involved; 2) Different LID facilities are usually set in a combined mode, different facilities types, different layout areas and other factors exist in the combined LID facilities, the prior art cannot be compared, and meanwhile, variable factors such as environments and the like exist in different areas, so that the prior art cannot measure the different facilities.
Based on the problems in the prior art, a method for accurately and quantitatively evaluating the benefits of different combined LID facilities in different areas is urgently needed.
Disclosure of Invention
The application aims to: the application aims to solve the problems in the prior art, and therefore provides a benefit evaluation system and method for the full life cycle of a combined LID facility.
The technical scheme is as follows: a benefit evaluation system and method for a combined LID facility full life cycle comprises a carbon emission accounting module, a rainfall flood control calculation module and a carbon emission intensity calculation module;
the carbon emission accounting module is used for accounting the carbon emission generated by single LID facilities in different stages in the whole life cycle and carrying out summation calculation to obtain the total carbon emission of the single LID facilities in the whole life cycle; dividing the total carbon emission amount of the single LID facility in the whole life cycle by the whole life cycle to obtain the annual average carbon emission amount of the single LID facility; adding the single LID facility annual average carbon emission total to obtain combined LID facility annual average carbon emission;
the rainfall flood control calculation module is used for subtracting the runoff quantity after the combined LID facilities are arranged from the field rainfall quantities in different rainfall reproduction periods to obtain the runoff total quantity control quantities in different rainfall reproduction periods; taking the reciprocal of different rainfall reproduction periods as a weight to carry out weighted average calculation on the runoff total control quantity of the different rainfall reproduction periods, and multiplying the weighted average calculation by the annual average rainfall depth after normalization to obtain the annual runoff total control quantity of the combined LID facility;
the carbon emission intensity calculation module is used for calculating the ratio of the annual average carbon emission of the combined LID facility calculated by the carbon emission calculation module to the annual runoff total control quantity of the combined LID facility calculated by the rainfall flood control calculation module to obtain the annual runoff total control quantity carbon emission intensity of the combined LID facility.
Further, the calculation relation of the annual runoff total control quantity carbon emission intensity of the combined LID facility is as follows:
wherein: e is the total annual runoff control amount carbon emission intensity of the combined LID facility, and the unit is: kg CO 2 /m 3 The method comprises the steps of carrying out a first treatment on the surface of the ACE is the annual average carbon emission of a combined LID facility in units: kg CO 2 Year/year; ACV is the total annual runoff control quantity of the combined LID facility in units: m is m 3 Year.
Further, the calculation relation of the annual average carbon emission of the combined LID facility is as follows:
ACE＝∑CE
wherein: ACE is the annual average carbon emission of a combined LID facility in units: kg CO 2 Year/yearThe method comprises the steps of carrying out a first treatment on the surface of the CE is the annual average carbon emission total of a single LID facility, unit: kg CO 2 Year.
Further, the calculation relation of the annual average carbon emission total of the single LID facility is as follows:
CE JS ＝AD×EF JS
CE YW ＝N LCA ×(CV×EF YX +AD×EF WH -AD Green ×EF H )
CE CC ＝AD×EF CC
CE LCA ＝CE JS +CE YW +CE CC
wherein: CE (CE) JS Carbon emission in unit for single LID facility construction stage: kgCO 2 The method comprises the steps of carrying out a first treatment on the surface of the AD is the single LID facility layout area, unit: m is m 2 ；EF JS Carbon emission factor in the construction phase for a single LID facility, unit: kgCO 2 /m 2 ；CE YW Carbon emission in unit for single LID facility operation and maintenance stage: kgCO 2 ；N LCA For a single LID facility full life cycle year, units: years of life; CV is the total annual runoff control quantity of single LID facilities in units: m is m 3 Year/year; EF (electric F) YX For running carbon emission factors in a single LID facility operation and maintenance phase, units: kgCO 2 /m 3 ；EF WH Carbon emission factors are maintained for a single LID facility in the middle year in the operation and maintenance stage, and the unit is as follows: kgCO 2 /(m 2 Year); AD (analog to digital) converter Green Green land area in LID facilities, units: m is m 2 ；EF H The carbon sequestration factor is the carbon sequestration factor of green land, unit: kgCO 2 /(m 2 Year); CE (CE) CC Carbon emissions in units of single LID facility removal phase: kgCO 2 ；EF CC Carbon emission factor in unit for single LID facility at demolition stage: kgCO 2 /m 2 ；CE LCA Total carbon emissions in units of single LID facility full life cycle: kgCO 2 The method comprises the steps of carrying out a first treatment on the surface of the CE is single LID facility annual average carbon lineTotal amount, unit: kgCO 2 Year.
Further, the relation between the total annual runoff control quantity of the combined LID facility and the total annual runoff control quantity of the single LID facility is:
ACV＝∑CV
wherein: ACV is the total annual runoff control quantity of the combined LID facility in units: m is m 3 Year/year; CV is the total annual runoff control quantity of single LID facilities in units: m is m 3 Year.
Further, the calculation relation of the total annual runoff control quantity of the combined LID facility is as follows:
wherein: ACV is the total annual runoff control quantity of the combined LID facility in units: m is m 3 Year/year; v (V) rain，i Indicating that the rainfall recurrence period is P j Is set in units of: m is m 3 ；V runoff，i Indicating that the rainfall reappearance period is P after the combined LID facility is set j The amount of runoff generated at that time, unit: m is m 3 The method comprises the steps of carrying out a first treatment on the surface of the M is the number of set reproduction periods; p (P) j Is a reproduction period; h a To study annual average rainfall depth, units: mm/year; h j For reproduction period P j The following rainfall depth, unit: mm.
Further, the value of M is not smaller than 7.
Therefore, in the process of taking the value, the smaller the value of M is, the lower the accuracy of the obtained value is, and the accuracy of evaluation cannot be ensured.
Further, the V rain，i The value of (2) is calculated by a stormwater intensity formula.
Because the storm intensity formula can change according to different regions, the V is calculated rain，i Different storm intensity formulas need to be adopted, and the storm intensity formulas can be obtained from a weather bureau, a building bureau by building, a rainfall manual, teaching materials, references and the like.
Further, the V runoff，i Is a value of (2) is a modulusSimulation calculation is carried out by simulation software.
The simulation software can be one or more of InfoWorks ICM, SWMM or MIKE+.
In addition, the application also discloses a method for evaluating the full life cycle benefit of the combined LID facility by using the evaluation system, which comprises the following steps:
calculating the numerical value of the annual runoff total control quantity carbon emission intensity of different combined LID facilities in different research areas through the evaluation system; comparing the numerical values of the annual runoff total control quantity carbon emission intensity of different combined LID facilities in different research areas; the smaller the value, the less equivalent of carbon dioxide is discharged per control unit flow in the whole life cycle, namely the better the benefit.
By the evaluation method, whether different combined LID facilities in different areas meet the requirements of carbon emission reduction, carbon neutralization and the like can be quantitatively judged on the basis of the preparation standards, policy requirements and the like; and the benefit degree of the different combined LID facilities in different areas can be directly and quantitatively compared under the condition of not making standards, policy requirements and the like.
The beneficial effects are that:
1) The present application is applicable to a variety of LID facilities as well as to combined LID facilities including, but not limited to, water permeable pavement, bio-detention facilities, seepage wells, seepage pipes, grass planting furrows, submerged greenbelts, green roofs, combinations thereof, and the like. The numerical value of the annual runoff total control quantity carbon emission intensity of the combined LID facility is obtained through calculation, so that whether the combined LID facility accords with the policies of carbon emission reduction and carbon neutralization can be evaluated according to the numerical value of the carbon emission intensity, and the numerical value of the annual runoff total control quantity carbon emission intensity of different combined LID facilities in different areas can be obtained through calculation, so that the benefit and the benefit of different combined LID facilities in different areas can be accurately and quantitatively evaluated. The annual average carbon emission total of single LID facilities can be accurately calculated through the carbon emission accounting module, and then an accurate data source is provided for calculating the annual average carbon emission of the combined LID facilities and the annual runoff total control quantity carbon emission intensity fixed value of the combined LID facilities, so that further guarantee is provided for the reliability of data.
2) The rainfall flood control calculation module can calculate the annual runoff total control quantity of the combined LID facility, so that an accurate data source is provided for the carbon emission intensity calculation module, and under the support of multiple reliable data, the reliability of an evaluation method obtained by the evaluation system is higher.
Drawings
FIG. 1 is a data flow diagram of a combined LID apparatus full life cycle benefit evaluation system of the present application;
figure 2 is a flow chart of the combined LID facility full life cycle benefit evaluation system architecture of the present application.
In the figure: 1, a control module; 2, a storage module; 3, calculating a module; and 4, displaying the module.
Detailed Description
As shown in fig. 1, a benefit evaluation system for a full life cycle of a combined LID facility comprises a carbon emission accounting module, a rainfall flood control calculation module and a carbon emission intensity calculation module;
summing calculation is carried out through the carbon emission accounting module, so that the total carbon emission amount of the single LID facility in the whole life cycle is obtained, and the total carbon emission amount of the single LID facility in the whole life cycle is divided by the total life cycle year to obtain the annual average carbon emission amount of the single LID facility; and finally, accumulating and adding the single LID facility annual average carbon emission total to obtain the combined LID facility annual average carbon emission, wherein the calculation relation of the combined LID facility annual average carbon emission is as follows:
CE JS ＝AD×EF JS
CE YW ＝N LCA ×(CV×EF YX +AD×EF WH -AD Green ×EF H )
CE CC ＝AD×EF CC
CE LCA ＝CE JS +CE YW +CE CC
ACE＝∑CE
wherein: CE (CE) JS Carbon emission in unit for single LID facility construction stage: kg CO 2 The method comprises the steps of carrying out a first treatment on the surface of the AD is the single LID facility layout area, unit: m is m 2 ；EF JS Carbon emission factor in the construction phase for a single LID facility, unit: kg CO 2 /m 2 ；CE YW Carbon emission in unit for single LID facility operation and maintenance stage: kg CO 2 ；N LCA For a single LID facility full life cycle year, units: years of life; CV is the total annual runoff control quantity of single LID facilities in units: m is m 3 Year/year; EF (electric F) YX For running carbon emission factors in a single LID facility operation and maintenance phase, units: kg CO 2 /m 3 ；EF WH Carbon emission factors are maintained for a single LID facility in the middle year in the operation and maintenance stage, and the unit is as follows: kg CO 2 /(m 2 Year); AD (analog to digital) converter Green Green land area in LID facilities, units: m is m 2 ；EF H The carbon sequestration factor is the carbon sequestration factor of green land, unit: kg CO 2 /(m 2 Year); CE (CE) CC Carbon emissions in units of single LID facility removal phase: kg CO 2 ；EF CC Carbon emission factor in unit for single LID facility at demolition stage: kgCO 2 /m 2 ；CE LCA Total carbon emissions in units of single LID facility full life cycle: kg CO 2 The method comprises the steps of carrying out a first treatment on the surface of the CE is the annual average carbon emission total of a single LID facility, unit: kg CO 2 Year/year; ACE is the annual average carbon emission of a combined LID facility in units: kg CO 2 Year.
Subtracting the runoff quantity after the combined LID facilities are arranged from the field rainfall quantities in different rainfall reproduction periods by using the rainfall flood control calculation module to obtain the runoff total quantity control quantities in different rainfall reproduction periods; and taking the reciprocal of the different rainfall reproduction periods as a weight to perform weighted average calculation on the runoff total amount control quantity of the different rainfall reproduction periods, multiplying the weighted average calculation by the annual average rainfall depth after normalization to obtain the annual runoff total amount control quantity of the combined LID facility, wherein the calculation relation of the annual runoff total amount control quantity of the combined LID facility is as follows:
wherein: ACV is the total annual runoff control quantity of the combined LID facility in units: m is m 3 Year/year; v (V) rain，i Indicating that the rainfall recurrence period is P j Is set in units of: m is m 3 ；V runoff，i Indicating that the rainfall reappearance period is P after the combined LID facility is set j The amount of runoff generated at that time, unit: m is m 3 The method comprises the steps of carrying out a first treatment on the surface of the M is the number of set reproduction periods; p (P) j Is a reproduction period; h a To study annual average rainfall depth, units: mm/year; h j For reproduction period P j The following rainfall depth, unit: mm.
And the relation formula of the total annual runoff control quantity of the combined LID facility and the total annual runoff control quantity of the single LID facility is as follows:
ACV＝∑CV
wherein: ACV is the total annual runoff control quantity of the combined LID facility in units: m is m 3 Year/year; CV is the total annual runoff control quantity of single LID facilities in units: m is m 3 Year.
Calculating the ratio of the annual average carbon emission of the combined LID facility calculated by the carbon emission calculation module to the annual runoff total control quantity of the combined LID facility calculated by the rainfall flood control calculation module by using a carbon emission intensity calculation module to obtain the annual runoff total control quantity carbon emission intensity of the combined LID facility, wherein the calculation relation of the annual runoff total control quantity carbon emission intensity of the combined LID facility is as follows:
wherein: e is the total annual runoff control amount carbon emission intensity of the combined LID facility, and the unit is: kg CO 2 /m 3 The method comprises the steps of carrying out a first treatment on the surface of the ACE is the annual average carbon emission of a combined LID facility in units: kg CO 2 Year/year; ACV is the total annual runoff control quantity of the combined LID facility in units: m is m 3 Year.
As shown in fig. 2, the benefit evaluation system further comprises a control module 1, a storage module 2, a calculation module 3 and a display module 4; the control module 1 is responsible for controlling all execution steps of the evaluation system, wherein the steps comprise data import and export in the storage module 2, data acquisition and calculation in the storage module 2 by the calculation module 3, and the display module 4 displays the calculation result of the calculation module 3 through a visual interface;
the storage module 2 is internally provided with a layout area of single LID facilities, field rainfall in different rainfall reproduction periods, runoff data calculated by simulation software, carbon emission factor data of each stage of the single LID facilities, rainfall reproduction periods, the number of the rainfall reproduction periods, annual average rainfall depth of a research area and field rainfall depth of the reproduction periods;
the calculation module 3 can calculate and obtain the total carbon emission amount of the single LID facility in the whole life cycle, the total annual average carbon emission amount of the single LID facility, the annual average carbon emission amount of the combined LID facility, the total runoff control amount of different rainfall reproduction periods, the total annual runoff control amount of the combined LID facility and the total annual runoff control amount carbon emission intensity of the combined LID facility;
the display module 4 can display the annual runoff total control quantity carbon emission intensity value of the combined LID facility obtained by the calculation module 3 to a user through a visual interface, so that the user can record and compare the annual runoff total control quantity carbon emission intensity value conveniently.
The benefits of the full life cycle of three different combined LID facilities for the following two areas were evaluated using the above detailed description:
region one: the research area is located in the Dashoveling bay port area of Shenzhen Baoan district in Guangdong province and in the southwest of Shenzhen province, and is the urban trunk road of the urban Dashoveling bay section, two-way six lanes, and the total area is 8.9X10 4 m 2 。
Combined LID facility one: in the first area, the scheme of combining the LID facility I is water permeable pavement and biological detention facilities, and the distribution areas are 9481m respectively 2 、5755m 2 。
Combining LID facilities II: in the first area, the scheme of combining the LID facilities II is that water-permeable pavement and biological detention facilities are arranged in 16712m areas respectively 2 、6176m 2 。
Calculated by the specific embodimentsTotal annual runoff control amount carbon emission intensity of LID facility I and combined LID facility II is-1.81 kg CO respectively 2 /m 3 、-1.67kgCO 2 /m 3 。
Area two: the research area is positioned in a catchment area in a new district in Tianshui city of Gansu province, and the area of the research area is 2930m 2 The land types include construction land, green land, and road land (including both concrete pavement and stone-paved pavement).
Combined LID facility three: in the second region, the scheme of combining LID facilities three is that the biological detention facilities are arranged with the area of 91m 2 。
The annual runoff total control quantity carbon emission intensity of the combined LID facility III is calculated by the specific embodiment, and the value is 0.0973kgCO 2 /m 3 。
As can be seen from the numerical comparison, the combined LID facility I in the same area I has better benefits than the combined LID facility II, and the combined LID facility I/II (in the area I) in different areas has better benefits than the combined LID facility III (in the area II).
Based on the above embodiments, the present application has the following advantages over the prior art:
1) The present application is applicable to a variety of LID facilities as well as to combined LID facilities including, but not limited to, water permeable pavement, bio-detention facilities, seepage wells, seepage pipes, grass planting furrows, submerged greenbelts, green roofs, combinations thereof, and the like. The numerical value of the annual runoff total control quantity carbon emission intensity of the combined LID facility is obtained through calculation, so that whether the combined LID facility accords with the policies of carbon emission reduction and carbon neutralization can be evaluated according to the numerical value of the carbon emission intensity, and the numerical value of the annual runoff total control quantity carbon emission intensity of different combined LID facilities in different areas can be obtained through calculation, so that the benefit and the benefit of different combined LID facilities in different areas can be accurately and quantitatively evaluated.
2) The annual average carbon emission total of single LID facilities can be accurately calculated through the carbon emission accounting module, and then an accurate data source is provided for calculating the annual average carbon emission of the combined LID facilities and the annual runoff total control quantity carbon emission intensity fixed value of the combined LID facilities, so that further guarantee is provided for the reliability of data.
3) The rainfall flood control calculation module can calculate the annual runoff total control quantity of the combined LID facility, so that an accurate data source is provided for the carbon emission intensity calculation module, and under the support of multiple reliable data, the reliability of an evaluation method obtained by the evaluation system is higher.
While the application has been shown and described with respect to the preferred embodiments, it will be understood by those skilled in the art that various changes and modifications may be made therein without departing from the scope of the application as defined in the following claims.
Claims (10)
1. The benefit evaluation system for the full life cycle of the combined LID facility is characterized by comprising a carbon emission accounting module, a rainfall flood control calculation module and a carbon emission intensity calculation module;
the carbon emission accounting module is used for accounting the carbon emission generated by single LID facilities in different stages in the whole life cycle and carrying out summation calculation to obtain the total carbon emission of the single LID facilities in the whole life cycle; dividing the total carbon emission amount of the single LID facility in the whole life cycle by the whole life cycle to obtain the annual average carbon emission amount of the single LID facility; adding the single LID facility annual average carbon emission total to obtain combined LID facility annual average carbon emission;
the rainfall flood control calculation module is used for subtracting the runoff quantity after the combined LID facilities are arranged from the field rainfall quantities in different rainfall reproduction periods to obtain the runoff total quantity control quantities in different rainfall reproduction periods; taking the reciprocal of different rainfall reproduction periods as a weight to carry out weighted average calculation on the runoff total control quantity of the different rainfall reproduction periods, and multiplying the weighted average calculation by the annual average rainfall depth after normalization to obtain the annual runoff total control quantity of the combined LID facility;
the carbon emission intensity calculation module is used for calculating the ratio of the annual average carbon emission of the combined LID facility calculated by the carbon emission calculation module to the annual runoff total control quantity of the combined LID facility calculated by the rainfall flood control calculation module to obtain the annual runoff total control quantity carbon emission intensity of the combined LID facility.
2. The full life cycle benefit evaluation system of the combined LID facility according to claim 1, wherein the calculated relation of the annual total runoff control amount carbon emission intensity of the combined LID facility is:
wherein: e is the total annual runoff control amount carbon emission intensity of the combined LID facility, and the unit is: kg CO 2 /m 3 The method comprises the steps of carrying out a first treatment on the surface of the ACE is the annual average carbon emission of a combined LID facility in units: kg CO 2 Year/year; ACV is the total annual runoff control quantity of the combined LID facility in units: m is m 3 Year.
3. The combined LID facility full life cycle benefit evaluation system of claim 1, wherein the combined LID facility annual average carbon emissions calculation relationship is:
ACE＝∑CE
wherein: ACE is the annual average carbon emission of a combined LID facility in units: kg CO 2 Year/year; CE is the annual average carbon emission total of a single LID facility, unit: kg CO 2 Year.
4. The combined LID facility full life cycle benefit evaluation system of claim 3, wherein the single LID facility annual average carbon emission total calculated relationship is:
CE JS ＝AD×EF JS
CE YW ＝N LCA ×(CV×EF YX +AD×EF WH -AD Green ×EF H )
CE CC ＝AD×EF CC
CE LCA ＝CE JS +CE YW +CE CC
wherein: CE (CE) JS Carbon emission in unit for single LID facility construction stage: kgCO 2 The method comprises the steps of carrying out a first treatment on the surface of the AD is the single LID facility layout area, unit: m is m 2 ；EF JS Carbon emission factor in the construction phase for a single LID facility, unit: kgCO 2 /m 2 ；CE YW Carbon emission in unit for single LID facility operation and maintenance stage: kgCO 2 ；N LCA For a single LID facility full life cycle year, units: years of life; CV is the total annual runoff control quantity of single LID facilities in units: m is m 3 Year/year; EF (electric F) YX For running carbon emission factors in a single LID facility operation and maintenance phase, units: kgCO 2 /m 3 ；EF WH Carbon emission factors are maintained for a single LID facility in the middle year in the operation and maintenance stage, and the unit is as follows: kgCO 2 /(m 2 Year); AD (analog to digital) converter Green Green land area in LID facilities, units: m is m 2 ；EF H The carbon sequestration factor is the carbon sequestration factor of green land, unit: kgCO 2 /(m 2 Year); CE (CE) CC Carbon emissions in units of single LID facility removal phase: kgCO 2 ；EF CC Carbon emission factor in unit for single LID facility at demolition stage: kgCO 2 /m 2 ；CE LCA Total carbon emissions in units of single LID facility full life cycle: kgCO 2 The method comprises the steps of carrying out a first treatment on the surface of the CE is the annual average carbon emission total of a single LID facility, unit: kgCO 2 Year.
5. The full life cycle benefit evaluation system of the combined LID facility according to claim 4, wherein the relation between the annual runoff total control amount of the combined LID facility and the annual runoff total control amount of the single LID facility is:
ACV＝∑CV
wherein: ACV is the total annual runoff control quantity of the combined LID facility in units: m is m 3 Year/year; CV is the total annual runoff control quantity of single LID facilities in units: m is m 3 Year/year。
6. The full life cycle benefit evaluation system of the combined LID facility according to claim 1, wherein the calculated relation of the total annual runoff amount control amount of the combined LID facility is:
wherein: ACV is the total annual runoff control quantity of the combined LID facility in units: m is m 3 Year/year; v (V) rain，i Indicating that the rainfall recurrence period is P j Is set in units of: m is m 3 ；V runoff，i Indicating that the rainfall reappearance period is P after the combined LID facility is set j The amount of runoff generated at that time, unit: m is m 3 The method comprises the steps of carrying out a first treatment on the surface of the M is the number of set reproduction periods; p (P) j Is a reproduction period; h a To study annual average rainfall depth, units: mm/year; h j For reproduction period P j The following rainfall depth, unit: mm.
7. The combined LID facility full life cycle benefit evaluation system of claim 6, wherein the value of M is not less than 7.
8. The combined LID facility full life cycle benefit assessment system of claim 6, wherein the V rain，i The value of (2) is calculated by a stormwater intensity formula.
9. The combined LID facility full life cycle benefit assessment system of claim 6, wherein the V runoff，i The value of (2) is calculated by simulation software.
10. A method for evaluating the benefit of the whole life cycle of a combined LID facility, which utilizes the evaluation system as claimed in any one of claims 1 to 9, wherein the evaluation system is used for calculating the numerical value of the annual runoff total control quantity carbon emission intensity of different combined LID facilities in different research areas; comparing the numerical values of the annual runoff total control quantity carbon emission intensity of different combined LID facilities in different research areas; the smaller the value, the less equivalent of carbon dioxide is discharged per control unit flow in the whole life cycle, namely the better the benefit.
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