DB/T 70-2018 in English

VALID

Report writing specifications for the field verification of observed seismic anomaly-Underground fluid

Issued on:2018-12-26
Implemented on:2019-03-01
File Format:PDF
Delivery:Via email within 1~3 business days

Price(USD)： $230.00
$224.00

Standard No:	DB/T 70-2018
Document status:	VALID
Title in English:	Report writing specifications for the field verification of observed seismic anomaly-Underground fluid
Title in Chinese:	地震观测异常现场核实报告编写地下流体
Language:	English
File Format:	Electronic (PDF)
Delivery:	Via email within 1~3 business days
Issued on:	2018-12-26
Implemented on:	2019-03-01
Professional Classification:	DB-Provincial Standard
Related Topics:	to observe streamline observation Abnormal water flow detection Local level inspection report abnormal curve lower body groundwater routine Field observation report Modern Observation Network Field report analysis verify Abnormal current motor Seismic survey On-site inspection report write abnormal karyotype Abnormal photocurrent test Seismic wave field Seismic wave field underground test site Current Abnormal Analysis Field Installation Report earthquake time flow experiment report Field observation report report writing Cabinet earthquake resistance test report Experiment report on measuring the viscosity of liquids Flow velocity measurement experiment report underground fluid mercury Methodological experimental anomalies Abnormal metal flow lines

Introduction

Interpretation of the core content of the standard

Element categories	Practice in the 1990s	Current standard requirements	Technological evolution
Basis for abnormal judgment	Empirical qualitative judgment	Supported by physical/chemical experimental data	Quantitative analysis replaces subjective judgment
Report structure	Non-standard free format	Four-part eight-element system	Establishment of standardized template
Technical methods	Single water level observation	Multi-parameter Joint Analysis	Improved Comprehensive Monitoring Capabilities

Key Technical Points

Anomaly Classification System

The standard clearly divides anomalies into three categories: tectonic activity anomalies (Grades A/B/C), interference anomalies, and pending anomalies. Category A anomalies must meet the following requirements: Observation curves from equipment such as water level meters must be dynamically stable and have excellent predictive performance. Supporting documentation must include at least five items, such as aquifer parameter calculations and water temperature gradient maps. Environmental Survey Specifications require the establishment of a three-dimensional impact factor matrix: The horizontal range must indicate the distribution of pumping and injection wells within a 3km radius, and the vertical range must measure the hydraulic connection coefficient between the observation layer and the interference layer. A typical example is that in 2017, abnormal water levels at a station in Anhui Province were ultimately attributed to a newly built irrigation system 2.5km away.

Implementation Recommendations

Multi-source data integration: It is recommended to establish a regional hydrogeological database to achieve automated cross-validation
Equipment configuration: On-site verification should be equipped with equipment such as downhole television and portable water quality analyzers.
Staff training: Emphasis should be placed on professional skills training

Background of Standard Development

Based on the statistical analysis of 427 anomaly verification cases between 2008 and 2016, it was found that the original method had the following problems: ① 23% of the reports lacked quantitative basis ② 37% of the environmental surveys were incomplete. This standard introduces for the first time Hydrogeochemical Characteristics Analysis (Appendix B) and Anomaly Reliability Assessment System (Clause 4.5.3), which increases the reliability of conclusions by more than 40%.

More samples: DL/T 5154-2012 QC/T 942-2021 NB/T 47013.2-2015

Sample only — not a preview of DB/T 70-2018