T/ACEF 259-2026 Technical specification for investigation and evaluation of nitrogen and phosphorus pollution in river, lake and reservoir sediments

Scope

This document specifies the evaluation principles and process, on-site investigation and sample processing, evaluation factors, evaluation methods, evaluation grading, and results for the investigation and evaluation of nitrogen and phosphorus pollution in the sediment of rivers, lakes, and reservoirs. This document is applicable to routine investigations and special evaluations of nitrogen and phosphorus pollution in the sediment of rivers, lakes, and reservoirs. Investigations and evaluations of nitrogen and phosphorus pollution in endogenous pollution treatment, ecological dredging, and water body ecological restoration projects can refer to this document for implementation. 4. Evaluation Principles and Process 4.1 Evaluation Principles 4.2 Workflow 5. Preliminary Investigation 5.1 Data Collection and Site Survey 5.2 Sampling Point Layout 5.3 Sample Collection 5.4 Analysis and Detection 6. Preliminary Evaluation 6.1 Evaluation Methods 6.2 Evaluation Grading 6.3 Result Judgment 7. Detailed Investigation 7.1 Dense Point Layout 7.2 Sample Collection 7.3 Analysis and Detection 8. Final Evaluation 8.1 Evaluation Methods 8.2 Evaluation Grading 8.3 Result Judgment 9. Evaluation Report Appendix A (Information) Example of Field Record for Sampling of Sediment in Rivers, Lakes, and Reservoirs Appendix B (Information) Example of Statistical Presentation of Evaluation Results for Nitrogen and Phosphorus Pollution in Sediment

Development Information

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