GNWT - Great Slave Lake Water Quality Monitoring Program ...

• Main Author: GNWT ECC Water Monitoring and Stewardship Division
• Format: Dataset
• Language: English
• Published: DataStream 2024
• Subjects: Great Slave Lake
• Online Access: https://dx.doi.org/10.25976/3ogv-7n39; https://datastream.org/dataset/c0514cb5-a326-4183-90c0-7293574ee6bd

The Great Slave Water Quality Monitoring Program is one component of the proposed Great Slave Lake Research and Monitoring Program which is in development with water partners to: coordinate long-term collection of baseline water quality across the lake; assess trends in water quality and quantity; carry out vulnerability assessments; better understand natural variability and changes being observed in the watershed; and to create long term capacity building research and monitoring partnerships. ... : Water samples are collected 2-5 samples per year depending on the location of the sample site. Surface water grab samples are collected at ~10 cm – 50 cm beneath the surface into clean sample bottles. Discrete depth samples are collected at some sites, using a Kemmerer water sampler attached to a pre-measured line using a weighted messenger. Field measurements are also taken at site using YSI EXO 2 Sondes. A suite of water samples consists of ~3 L total of water collected into nine clean sample bottles separated by analysis type. All clean sample bottles are triple rinsed in the field with the sample water before filling. Most parameters are collected into PET bottles while trace mercury samples are collected into duplicate clean borosilicate vials using the “clean hands” and “dirty hands” protocol and additionally stored inside a double layer of PE bags. Total metals are preserved in the field to pH < 2 using HNO₃. QA/QC samples include field duplicates in addition to field and travel blanks. After ...