Tip of the Mitt Watershed Council Comprehensive Water Quality Monitoring Program lake chemistry, MI, intermittent years between 1987-2010

The Comprehensive Water Quality Monitoring Program was launched by Tip of the Mitt Watershed Council in 1987, with subsequent field data collection in 1992, 1995, 1998, 2001, 2004, 2007, and 2010. Initially, physical and chemical data were collected on 10 lakes but the program has progressively expanded and, as of the 2010 field season, 143 samples were collected from 60 sites on 55 lakes and streams. Typically, data for nine parameters (temperature, dissolved oxygen, pH, conductivity, clarity, total phosphorous, total nitrogen, nitrate-nitrogen, and chloride) are collected at the surface, middle and bottom of the water column in each water body. This highly-accurate water quality data for lakes and rivers in Northern Michigan, collected consistently for the last 20+ years, have been compiled into a single database that can be used by staff to evaluate aquatic ecosystem health, examine trends within or among water bodies, and identify specific problems.

综合水质监测计划由密特角流域委员会（Tip of the Mitt Watershed Council）于1987年发起，后续分别于1992年、1995年、1998年、2001年、2004年、2007年及2010年完成野外数据采集。项目初期仅针对10个湖泊收集理化监测数据，后逐步拓展监测覆盖范围；截至2010年野外监测季，已从55个湖泊与溪流的60个监测点位采集共计143份样本。常规监测中，每个水体的水柱表层、中层及底层均会采集9项参数的数据，包括温度（temperature）、溶解氧（dissolved oxygen）、pH值（pH）、电导率（conductivity）、透明度（clarity）、总磷（total phosphorous）、总氮（total nitrogen）、硝态氮（nitrate-nitrogen）及氯化物（chloride）。本数据集涵盖密歇根北部地区湖泊与河流的高精度水质数据，历经20余年持续采集，现已整合至统一数据库，可供工作人员用于评估水生生态系统健康状况、分析水体内部及跨水体的变化趋势，以及定位具体水环境问题。