湖泊调查方法-水环境-英文授课.pptVIP

Introduction to Lake Surveys Basic Water Quality Assessment Unit 3 Module 8 Part B Field Profiles Objectives Students will be able to: identify, utilize, calibrate and troubleshoot probes used for measuring temperature. identify, utilize, calibrate and troubleshoot probes used for measuring dissolved oxygen. interpret information gathered by temperature and dissolved oxygen probes. identify examples of error from data gathered from field probes. identify, utilize, calibrate and troubleshoot probes used for measuring electrical conductivity (EC25). estimate total dissolved solid (TDS) concentrations in lakes identify, utilize, calibrate and troubleshoot probes used for measuring pH. explain how to effectively use a secchi disk to determine water clarity. interpret secchi disk data to evaluate water clarity trends in a lake. explain how to effectively use a transparency tube to determine water clarity. identify, utilize, calibrate and troubleshoot probes used for measuring turbidity. relate the importance of light to lake profiles and chlorophyll production. Basic water quality assessment These slides focus on learning basic field techniques used by limnologists: Morphometry - estimating critical lake basin measurements Field profiles - physical and chemical parameters measured from top to bottom of the water column Sampling – collecting water, sediments, and aquatic organisms Physical and chemical profiles Goal: Learn how to collect basic water quality data using common field instrumentation Physical and chemical field profiles Field profiles Sensors Temperature Dissolved oxygen pH Specific conductivity Transparency Secchi, turbidity Chlorophyll probes Light profiles Profiling guidelines/examples/helpful hints Physical and chemical field profiles Topics covered: Definition - why it’s important (quick review) Units of measure - data reporting Probe types - calibration, storage, cleaning Where and how often should profiles be measured? Troubleshooting and QA (what c