湖沼学chapter 13 Method of Lake Surveys.ppt

Introduction to Lake Surveys Basic Water Quality Assessment Unit 3 Module 8 Part C Lake Sampling Objectives Students will be able to: explain methods used for collecting water, sediment and aquatic organisms. identify reasons for collecting water and sediment samples. compare and contrast the characteristics and use of discrete water samplers, integrated water samplers, grab samples and pumps. explain methods used for collecting contaminants and microbes. utilize guidelines to determine the size of the water sample needed to conduct specific analyses. demonstrate specified labeling techniques. describe the different methods of sediment sampling. categorize aquatic organisms by size. describe procedures used in sampling phytoplankton/algae, periphyton, zooplankton, and benthic invertebrates. compare and contrast direct and indirect quantitative analysis with qualitative analysis used to study phytoplankton. classify periphyton by the substrates they grow on. compare and contrast quantitative and qualitative analysis used to study periphyton, zooplankton, and benthic invertebrates. describe procedures used in sampling aquatic vegetation. explain the importance of diatoms in determining water quality. 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 Lake sampling This module contains information about the basic techniques needed to perform a baseline characterization of a lake. Learn how to collect water, sediment and aquatic organisms from different habitats. Lake sampling Water samples collected for: major ions nutrients chlorophyll-a, phytoplankton total suspended solids, turbidity color, organic carbon, biochemical oxygen demand Iron (Fe) and other metals (special case mercury-Hg) organ