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GB/T 42435-2023Technical specification for coastal erosion monitoring and disaster losses evaluation (English PDF)

海岸侵蚀监测与灾害损失评估技术规范

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Issued by

SAMR; SAC

Level / Type

National · Recommended

Issue date

May 23, 2023

Implementation date

September 1, 2023

Scope

GB/T 42435-2023 is the English-translated version of 海岸侵蚀监测与灾害损失评估技术规范.

GB/T 42435-2023 is the Chinese national technical specification for monitoring coastal erosion, assessing the losses it causes and compiling the resulting data.

Its contents list covers data collection and desk research, on-site monitoring and data processing, then the method and the steps of the erosion hazard assessment and the required outputs - datasets, result maps and a monitoring and evaluation report.

Sixteen normative appendices carry the field and statistical forms: monitoring pile embedding and design, pile registration, shoreline and cross-section field records, the disaster loss field survey, shoreline retreat rate, beach erosion rate, section and dynamic sediment observation, the risk assessment method, the intensity and disaster grade tables and the report format.

Clause 1 states that it applies to sandy and silty-muddy coasts of the mainland and islands. Issued on 23 May 2023, it has applied since 1 September 2023.

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Document preview — GB/T 42435-2023

National Standard of the People's Republic of China

ICS: 07.060
Classification: A 45

Issued by: State Administration for Market Regulation; Standardization Administration of the PRC

Preface
1 Scope
2 Normative references
3 Terms and Definitions
4 Coastal Erosion Monitoring
4.1 Data collection and survey and research
4.2 On-site monitoring
4.3 Data processing
5 Coastal Erosion Hazard Assessment
5.1 Evaluation content
5.2 Evaluation method and steps
6 Outcome
6.1 Datasets
6.2 Results map
6.3 Monitoring and Evaluation Report
Appendix A (Normative) Monitoring pile embedding and design requirements
Appendix B (Normative) Monitoring Pile Information Registration Form
Appendix C (Normative) Shoreline Monitoring Field Record Form
Appendix D (Normative) Section Monitoring Field Record Form
Appendix E (Normative) Coastal Erosion Disaster Loss Field Survey Form
Appendix F (Normative) Shoreline retreat rate statistics table
Appendix G (Normative) Cross-section terrain monitoring statistics table
Appendix H (Normative) Statistical Table of Beach Erosion Rate
Appendix I (Normative) Section Sediment Monitoring Statistical Table
Appendix J (Normative) Statistical Table of Dynamic Sediment Observation
Appendix K (Normative) Coastal Erosion Disaster Loss Statistical Table
Appendix L (Normative) Coastal Erosion Risk Assessment Method
Appendix M (Normative) Statistical Table of Coastal Erosion Intensity Grades
Appendix N (Normative) Coastal Erosion Disaster Grade Statistical Table
Appendix O (Normative) Drawing Requirements for Maps of Coastal Erosion Intensity, Hazard Level, and Disaster Level
Appendix P (Normative) Format and Content of Coastal Erosion Monitoring and Disaster Loss Assessment Report
Reference

Foreword

This document is in accordance with the provisions of GB/T 1.1-2020 "Guidelines for Standardization Work Part 1: Structure and Drafting Rules for Standardization Documents" drafting.

1 Scope

This document specifies the technical requirements for coastal erosion monitoring, coastal erosion disaster loss assessment, and result data compilation.

This document is applicable to the erosion monitoring and disaster loss assessment of sandy coasts and silty muddy coasts in my country's mainland and islands.

2 Normative references

The contents of the following documents constitute the essential provisions of this document through normative references in the text. Among them, dated references For documents, only the version corresponding to the date is applicable to this document; for undated reference documents, the latest version (including all amendments) is applicable to this document.

GB/T 12763.2 Marine Survey Specification Part 2: Marine Hydrological Observation

GB/T 12763.8 Specifications for marine surveys Part 8: Marine geological and geophysical surveys

GB/T 12898 National Level III and IV Standards

GB/T 15968 Specifications for making planar maps of remote sensing images

GB/T 17501-2017 Code for topographic survey of marine engineering

GB/T 20257.1 National Basic Scale Map Schema Part 1. 1.500 1.1000 1.2000 Topographic Map Schema

GB/T 20257.2 National Basic Scale Map Schema Part 2. 1.5000 1.10000 Topographic Map Schema

GB/T 21010 Classification of Land Use Status

CH/T 2009 Global Positioning System Real-time Kinematic Measurement (RTK) Technical Specification

CH/T 3003 Low-altitude digital aerial photogrammetry industry specification

3 Terms and Definitions

The following terms and definitions apply to this document.

3.1 Coastal erosion

Geological disasters caused by natural factors and human factors that cause the coastline to recede, or the beach surface to erode, narrow and steepen. [Source: GB/T 18190-2017, 5.1.1]

3.2

The slope between the low tide line and the closed water depth. [Source: GB/T 18190-2017, 2.1.9]

3.3

A steep coastal slope with a height difference ranging from a few centimeters to tens of meters and a slope greater than 70°.

3.4 beach erosion

Coastal erosion changes caused by natural or human factors that reduce the elevation of the beach surface.

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This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 40 pages — is available in the English PDF.

Referenced standards

Normative references

Similar standards

GB/T 20481-2026|GB/T 20486-2026|GB/T 22482-2026|GB/T 28593-2026|GB/T 33670-2026|GB/T 33675-2026

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