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GB/T 41222-2021Soil quality—Method for monitoring the farmland surface runoff (English PDF)

土壤质量农田地表径流监测方法

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Issued by

SAMR; SAC

Level / Type

National · Recommended

Issue date

December 31, 2021

Implementation date

July 1, 2022

Scope

GB/T 41222-2021 is the English-translated version of 土壤质量农田地表径流监测方法.

GB/T 41222-2021 is a method for monitoring surface runoff from farmland at field scale. It covers the layout of the runoff monitoring plots and the installation of the monitoring equipment, the collection, analysis and testing of runoff samples, and the calculation of sediment content, runoff volume, soil loss and pollutant discharge.

Normative annexes describe the arrangement of the monitoring plots, the runoff diversion device and the runoff tank or drum with their installation, the runoff basin and drainage system, and the structure and installation of farmland runoff collection pipes.

The analyses rely on referenced methods for total nitrogen, ammonia nitrogen, nitrate nitrogen and total phosphorus in water and soil. It was issued on 31 December 2021 and has applied since 1 July 2022.

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Document preview — GB/T 41222-2021

National Standard of the People's Republic of China

ICS: 13.060.01
Classification: B 10

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

Preface
1 Scope
2 Normative references
3 Terms and Definitions
4 Layout of the runoff monitoring field and installation of monitoring equipment
5 Collection and analysis of runoff samples
6 Calculation of sediment content, runoff, soil loss and pollutant discharge
Appendix A (normative) Arrangement of Surface Runoff Monitoring Residential Areas
Appendix B (normative) Runoff diversion device, runoff tank (drum) and its installation
Appendix C (Normative) Specification and Construction of Runoff Basin and Drainage System
Appendix D (normative) Structure and Installation of Farmland Runoff Collection Pipes
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 of Standardization Documents" drafted.

1 Scope

This document specifies the layout of farmland runoff monitoring sites and the installation of monitoring equipment, the collection, analysis and testing of runoff samples, the amount of runoff water and the calculation of soil loss and pollutant discharge.

This document is applicable to activities that monitor surface runoff at the field scale.

2 Normative references

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

GB 3838 Environmental Quality Standard for Surface Water

GB/T 5750.5 Standard Test Method for Drinking Water Inorganic Nonmetallic Index

GB/T 11893 Determination of Total Phosphorus in Water Quality Ammonium Molybdate Spectrophotometry

GB 17378.4 Ocean Monitoring Code Part 4 Seawater Analysis

GB/T 50476 Design standard for durability of concrete structures

HJ/T 346 Determination of nitrate nitrogen in water quality by UV spectrophotometry

HJ 493 Technical regulations on preservation and management of water sampling samples

HJ 632 Soil Total Phosphorus Alkaline Fusion-Molybdenum Antimony Anti-Spectrophotometric Method

HJ 636 Determination of total nitrogen in water quality by alkaline potassium persulfate digestion UV spectrophotometry

HJ 665 Determination of Ammonia Nitrogen in Water Quality Continuous Flow-Salicylic Acid Spectrophotometry

HJ 667 Determination of Total Nitrogen in Water Quality Continuous Flow-Naphthalene Ethylene Diamine Hydrochloride Spectrophotometric Method

HJ 670 Determination of Phosphate and Total Phosphorus in Water Quality Continuous Flow-Ammonium Molybdate Spectrophotometry

NY/T 1121.24 Soil Testing Part 24. Determination of Total Nitrogen in Soil - Automatic Nitrogen Appraisal Method

SL 21 Specification for Precipitation Observation

SL 342 General Technical Conditions for Soil and Water Conservation Monitoring Facilities

3 Terms and Definitions

The following terms and definitions apply to this document.

3.1 Farmland

Land where crops are grown and cultivated regularly and can be harvested normally.

Note: Crops include food crops and various economic crops (vegetable crops, fiber crops, oil crops, sugar crops, fodder crops, medicinal crops, fruit trees, mulberry, tea, tobacco and flower nurseries, etc.).

3.2 Farmland surface runoff

After precipitation or irrigation water enters the farmland soil, except for plant interception, evaporation, infiltration and ridge storage, the rest flows through the field drainage outlet or […]

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This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 17 pages — is available in the English PDF.

Referenced standards

Normative references

SL 342

Similar standards

GB/T 47418-2026|GB/T 43742-2024|GB 18668-2002|GB 18421-2001|GB/T 15504-1995|GB/T 15505-1995

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