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Earthquake disaster assessment based on remote sensing. Earthquake-caused direct economic loss
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Basic data
| Standard ID | DB/T 79-2018 (DB/T79-2018) |
| Description (Translated English) | Earthquake disaster assessment based on remote sensing. Earthquake-caused direct economic loss |
| Sector / Industry | Chinese Industry Standard (Recommended) |
| Classification of Chinese Standard | P15 |
| Classification of International Standard | 91.120.25 |
| Word Count Estimation | 15,176 |
| Date of Issue | 2018-12-26 |
| Date of Implementation | 2019-03-01 |
| Quoted Standard | GB 17740; GB/T 17742; DB/T 58; DB/T 75-2018; DB/T 77-2018; DB/T 80-2018 |
| Regulation (derived from) | China Earthquake Administration Announcement (2018.12.26) |
| Issuing agency(ies) | China Earthquake Administration |
| Summary | This standard specifies the working procedures for the assessment of direct economic loss of earthquakes by means of remote sensing, the division and determination of remote sensing assessment zones, basic data collection, building area statistics, building losses and direct economic loss estimates and outcome outputs. This standard is applicable to the rapid assessment of direct economic losses in earthquake-stricken areas by means of remote sensing. |
DBT79-2018: Earthquake disaster assessment based on remote sensing. Earthquake-caused direct economic loss
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Earthquake disaster assessment based on remote sensing.Earthquake-caused direct economic loss
ICS 91.120.25P15
People's Republic of China Earthquake Industry Standard
Earthquake Disaster Remote Sensing Assessing the Direct Economic Losses of Earthquakes
2018-12-26 released
Implementation of 19-03-01
Issued by China Earthquake Administration
Table of contents
Foreword Ⅰ
Introduction Ⅱ
1 Scope 1
2 Normative references 1
3 Terms and definitions 1
4 Basic regulations 2
5 Determination of remote sensing evaluation area and division of evaluation units 2
6 Basic data collection 2
7 Assessment unit building area statistics 3
8 Building loss estimation 3
9 Estimation of the direct economic loss of the earthquake 5
10 Outcomes 5
Appendix A (Normative Appendix) Assessment Unit Building Area and Replacement Unit Price Information Table 7
Appendix B (Normative Appendix) Results of Remote Sensing Assessment of Building Loss 8
Appendix C (Informative Appendix) Statistical Example 9
Reference 11
Foreword
This standard is one of the series of "Earthquake Disaster Remote Sensing Assessment". The standard structure and name of the series are expected to be as follows.
---Evaluation of earthquake disasters by remote sensing of earthquake disasters;
---Evaluation of building damage by remote sensing of earthquake disaster;
---Evaluation of highway earthquake damage by remote sensing of earthquake disaster;
---Remote sensing of earthquake disasters to assess railway system earthquake damage;
---Destruction of key targets in remote sensing assessment of earthquake disasters;
---Evaluation of earthquake disaster area by remote sensing of earthquake disaster;
---Evaluation of earthquake intensity by remote sensing of earthquake disaster;
---Evaluation of the direct economic loss of earthquake disaster by remote sensing;
---Earthquake disaster remote sensing evaluation product output technical requirements;
This standard was drafted in accordance with GB/T 1.1-2009 "Guidelines for Standardization Part 1.Standard Structure and Compilation".
This standard was proposed by the China Earthquake Administration.
This standard is under the jurisdiction of the National Seismic Standardization Technical Committee (SAC/TC225).
Drafting organizations of this standard. Earthquake Administration of Jiangsu Province, Institute of Earthquake Prediction of China Earthquake Administration, Earthquake Administration of Tianjin, Xinjiang Uygur Autonomous Region
Earthquake.
Introduction
After a severely destructive earthquake occurs, quickly and accurately determine the type of earthquake disaster, the extent and scope of the earthquake disaster, is the earthquake emergency rescue command and operation.
Important basis for movement. Remote sensing technology has the characteristics of all-time, all-weather, and not affected by the damage of the earthquake in the earthquake-hit area. Therefore, the earthquake should be used after the earthquake.
In the emergency rescue, the disaster situation information of the earthquake-stricken area can be obtained quickly and comprehensively. There are many types and wide distribution of earthquake disasters, and different types of disaster information are provided.
There are obvious differences in the objects and methods of taking and evaluating, and it is difficult to adopt a single standard to regulate. For coordinated, orderly, efficient and accurate extraction and evaluation
To estimate the main types of earthquake disasters, it is necessary to standardize the methods, indicators, procedures and results of remote sensing evaluation.
Disaster Remote Sensing Assessment" series of standards.
The results of the earthquake damage investigation and loss assessment of historical earthquake sites show that the direct economic loss caused by the earthquake is related to the structural damage of the buildings in the earthquake-stricken area.
Between the damage loss, the damage loss of buildings in high-intensity areas (such as areas with Ⅷ degrees and above) and the damage loss of buildings in the entire earthquake-affected area.
There is a certain correspondence. This standard refers to GB/T 18208.4-2011 on the basis of remote sensing assessment of building damage and seismic intensity
"Earthquake Field Work Part 4.Assessment of Direct Disaster Loss" in the preliminary assessment of the direct loss of earthquake
Standardize the remote sensing evaluation of economic losses, and output in accordance with DB/T 80-2018 "Technical Requirements for the Output of Remote Sensing Evaluation Products for Earthquake Disasters"
result.
Earthquake Disaster Remote Sensing Assessing the Direct Economic Losses of Earthquakes
1 Scope
This standard specifies the work steps for using remote sensing to assess the direct economic losses of earthquakes, the determination of remote sensing assessment areas and the division of assessment units,
Basic data collection, building area statistics, building loss and direct economic loss estimation and results output.
This standard is applicable to the rapid assessment of direct economic losses in earthquake-stricken areas using remote sensing methods.
2 Normative references
The following documents are indispensable for the application of this document. For dated reference documents, only the dated version applies to this article
Pieces. For undated references, the latest version (including all amendments) applies to this document.
GB 17740 Earthquake magnitude regulations
GB/T 17742 China Earthquake Intensity Table
DB/T 58 Earthquake name determination rules
DB/T 75-2018 Earthquake disaster remote sensing assessment of building damage
DB/T 77-2018 Earthquake disaster remote sensing assessment of earthquake intensity
DB/T 80-2018 Earthquake disaster remote sensing evaluation product output technical requirements
3 Terms and definitions
The following terms and definitions apply to this document.
3.1
Direct economic loss from earthquake
Houses and other engineering structures, facilities, equipment, articles, etc. caused by earthquakes (including ground motions, earthquake geological disasters and earthquake secondary disasters)
Economic loss of item destruction.
[GB/T 18208.4-2011, definition 3.2]
3.2
earthquake area
Areas suffering casualties and economic losses after the earthquake.
[GB/T 18207.1-2008, definition 7.2]
3.3
seismic intensity
The magnitude of ground shaking caused by an earthquake and its impact.
[GB/T 17742-2008, definition 2.1]
3.4
Housing replacement unit price
Based on the current price, the cost per unit area of a house with the same specifications as the original house before the earthquake.
[GB/T 27933-2011, definition 3.3]
3.5
Loss ratio lossratio
The ratio of the repair unit price to the replacement unit price of a certain damage level of a house or engineering structure.
[GB/T 18208-2011, definition 3.9]
3.6
Earthquake loss rate
The ratio of the average repair unit price to the replacement unit price of a building after earthquake damage.
3.7
Remote sensing evaluation area
The evaluation space range determined when using remote sensing images to evaluate the disaster loss in the earthquake-stricken area.
4 Basic regulations
4.1 The earthquake magnitude M specified in GB 17740 should be used for the assessment of the direct economic loss of an earthquake.
4.2 Earthquake intensity should be used in the assessment of direct economic losses in accordance with GB/T 17742.
4.3 The name of the earthquake shall comply with the provisions of DB/T 58.
4.4 The remote sensing assessment of the direct economic loss of the earthquake is carried out according to the following steps.
a) Determine the remote sensing evaluation area and divide the evaluation unit;
b) Collect basic information;
c) Count the area of buildings in the evaluation unit;
d) Estimate building losses;
e) Estimate the direct economic losses of the earthquake.
5 Determination of Remote Sensing Evaluation Area and Division of Evaluation Units
5.1 Determination of remote sensing assessment area
The remote sensing assessment area for the direct economic loss of the earthquake should include the seismic intensity area Ⅷ (8 degrees) and above determined in accordance with DB/T 77-2018.
When there are high-resolution remote sensing images and can clearly assess the seismic intensity area of Ⅶ (7 degrees), the remote sensing evaluation area should include VII (7 degrees) and above.
Earthquake intensity zone.
5.2 Division of Evaluation Unit
5.2.1 The urban area of a county-level administrative district is divided into an assessment unit; the urban area of an administrative district divided into districts (or prefecture-level cities) and above is divided into
The administrative district or block is divided into several evaluation units.
5.2.2 The township-level administrative area is divided into an evaluation unit. When an M≥7.5 earthquake occurs, the three provinces (autonomous regions) of Qinghai, Xinjiang and Tibet
The earthquake-stricken areas of China are evaluated by the township-level administrative region, and the earthquake-stricken areas of other provinces (cities, autonomous regions) are evaluated by the county-level administrative regions (excluding urban areas)
Evaluation unit.
5.2.3 When an administrative area or block is cut by the boundary line of the remote sensing evaluation area or the intensity area, the cut internal area shall be regarded as an independent evaluation
unit.
6 Basic data collection
6.1 According to the provisions of DB/T 77-2018 and DB/T 75-2018, the remote sensing assessment area shall be collected to meet the requirements of building damage information extraction
Requested remote sensing data. Vector data on the boundaries of administrative regions at the township level and above should be collected.
6.2 The building data in the remote sensing assessment area can be collected based on the latest annual statistics or the basic earthquake emergency database.
6.3 The data on site disaster investigation, intensity assessment and loss assessment of earthquakes with magnitude M≥6.5 in China should be collected.
7 Assessment unit building area statistics
7.1 When the total area of buildings and the area of different types of buildings in the assessment unit can be based on the annual statistical data of the administrative unit or the earthquake emergency base
When the basic database is determined, the basic building type of each evaluation unit should be filled in according to the type of building classified in 4.3.1 of DB/T 75-2018 according to Table A.1.
For information, fill in the building area of each evaluation unit in accordance with Table A.2.
7.2 When there is no data on the total area of the buildings in the evaluation unit, it shall be interpreted and extracted through remote sensing in accordance with the provisions of 6.1 of DB/T 75-2018.
In this way, the area of buildings in the unit land area is obtained, and the total area of buildings in the evaluation unit is calculated according to formula (1).
7.3 When there is no area data of different types of buildings in the evaluation unit, the remote sensing solution shall be used in accordance with the provisions of 6.1 of DB/T 75-2018.
Translate and sample to estimate the area of different types of buildings per unit land area, and calculate the area of different types of buildings in the evaluation unit according to formula (2).
8 Building loss estimation
8.1 Loss of buildings in the remote sensing assessment area
8.1.1 Calculate the earthquake loss rate of the evaluation unit building according to formula (3).
8.1.2 The replacement unit price of different types of buildings shall be determined according to one of the following methods and filled in according to Table A.3.
a) According to the unit price of each structure type corresponding to the type of building collected at the earthquake site, according to the area (or number of rooms) of each structure type
The proportion is weighted and determined;
b) Determined based on the unit price of the main structure type of the type of building provided by the competent department of housing and construction in the earthquake-stricken area;
c) Based on the annual statistical data and the unit price of each structure type corresponding to the type of building in the earthquake emergency basic database, according to the results
The proportion of structure type area (or number of rooms) is weighted and determined.
8.1.3 According to the area of each type of building in the evaluation unit, the replacement unit price and the earthquake loss rate, calculate all buildings in the evaluation unit according to formula (4)
Loss of property damage.
8.1.4 Calculate the economic loss caused by the destruction of buildings in the remote sensing assessment area according to formula (5).
8.2 Building losses in the earthquake-stricken area
8.2.1 The economic loss LB caused by the structural damage of buildings in the earthquake-stricken area is calculated according to formula (6).
8.2.2 The ratio of the damage loss of the building structure in the earthquake-stricken area to the damage loss of the building structure in the remote sensing assessment area can be obtained from the historical earthquake site
Disaster investigation, intensity assessment and loss assessment data are statistically estimated according to formula (7).
9 Estimation of the direct economic loss of the earthquake
9.1 Methods for Estimating Direct Economic Losses of Earthquakes
9.1.1 The direct economic loss of the earthquake is calculated according to formula (8).
9.2 Consideration of uncertainty in estimation of earthquake direct economic losses
The uncertainty of various parameters in the estimation of building loss and the estimation of direct economic loss from earthquakes, as well as the magnitude and source of the earthquake, should be comprehensively considered.
The impact of depth and economic level on the direct economic loss caused by the earthquake, the direct economic loss of the earthquake should be estimated by considering the uncertainty.
Surround form representation.
10 Outcomes
10.1 The evaluation results of the direct economic losses of earthquakes based on remote sensing methods mainly include the structural damage of each evaluation unit in the remote sensing evaluation area.
Damages and direct economic losses from earthquakes.
10.2 The evaluation results of the direct economic losses of earthquakes are expressed using area vector geospatial data.
10.3 The data format of the evaluation results should meet the requirements of DB/T 80-2018 for map making and report writing.
Appendix A
(Normative appendix)
Assessment unit building area and replacement unit price information table
A.1 The basic information of the evaluation unit collected based on the statistical data of the administrative unit or the earthquake emergency basic database should be filled in according to Table A.1, the evaluation form
The area information of each type of building should be filled in according to Table A.2.
Notice on the Format Specification for Basic Database of Earthquake Emergency Response of the Regional Earthquake Relief Headquarters (for Trial Implementation) (Zhongzhen Fajiu [2004] No. 71)[Z].
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