Metoda Sampling : Sampling Air Sungai

Introduction

This tutorial provides a comprehensive guide on how to sample river water correctly, as demonstrated in the video "Metoda Sampling: Sampling Air Sungai." Following the standards set by SNI 6989.57.2008, this guide is essential for environmental practitioners and researchers conducting water quality assessments in rivers, particularly in the region of Sumatera Barat.

Step 1: Prepare Sampling Equipment

Before starting the sampling process, gather all necessary equipment. It is crucial to ensure that all tools are clean and ready for use to avoid contamination.

Equipment Checklist

• Clean sampling bottles (preferably glass)
• Ice packs or cooler to preserve samples
• Labels for sample identification
• Gloves for personal protection
• Field notebook for recording data

Practical Tips

• Use gloves to prevent contamination of the samples.
• Rinse sampling bottles with river water before collecting the sample to minimize contamination.

Step 2: Identify Sampling Location

Select a suitable location for sampling. The chosen site should represent the water quality of the river.

Key Considerations

• Avoid areas with obvious pollution sources (e.g., near factories or sewage discharge points).
• Choose a location with a consistent flow and depth, away from disturbances like rocks or debris.

Practical Tips

• Mark the site with GPS coordinates for future reference.
• Take note of environmental conditions such as weather and river flow.

Step 3: Collect Samples

Follow the proper technique to collect water samples that accurately represent the river's water quality.

Sampling Procedure

1. Approach the water body carefully to avoid disturbing the sediment.
2. Submerge the sampling bottle at a depth of about 15-30 cm below the water surface.
3. Fill the bottle without touching the inside or rim to maintain sterility.
4. Cap the bottle securely once filled.

Common Pitfalls to Avoid

• Do not sample water from the surface layer, as it may not represent the overall water quality.
• Ensure that the bottle is not contaminated by touching the inside or using unclean hands.

Step 4: Preserve and Transport Samples

After collecting the samples, proper preservation and transportation are crucial to maintaining the integrity of the samples.

Preservation Steps

• Store samples in a cooler with ice packs to maintain temperature.
• Label each sample with relevant information (date, time, location, and type of sample).

Practical Tips

• Transport samples to the laboratory as soon as possible, ideally within 24 hours.
• Avoid direct sunlight or extreme temperatures during transportation.

Step 5: Analyze Samples in the Laboratory

Once the samples arrive at the laboratory, follow the standard procedures for analyzing the water quality.

Laboratory Analysis Steps

• Conduct tests for parameters such as pH, turbidity, dissolved oxygen, and contaminants as per SNI standards.
• Record and interpret the results for environmental assessment.

Practical Tips

• Ensure all laboratory equipment is calibrated and maintained.
• Follow safety protocols while handling samples and reagents.

Conclusion

Sampling river water effectively requires careful preparation, execution, and analysis. By following the outlined steps, practitioners can ensure the integrity of their samples and the reliability of their water quality assessments. Next steps may include reviewing the results and developing a management plan based on the findings. Always adhere to established guidelines to protect both the environment and public health.