STATISTICS AND SAMPLING IN TRANS URANIC STUDIES 175 



Objectives in Sampling 



There are many ways in which the objectives of environmental studies can be arranged, 

 and we have suggested several such sets (Eberhardt, 1976; Eberhardt, 1977; Eberhardt 

 et al., 1976). In this chapter we consider four sampling methods to meet various 

 objectives: descriptive sampling, sampling for spatial patterii, analytical sampling, and 

 sampling for modeling. Although the four categories are neither mutually exclusive nor 

 all-inclusive, they do seem to serve as useful devices to cover most situations. Figure 1 

 illustrates the different objectives using the same physical example. Since the objectives 



POINT SOURCE 



ACCUMULATION IN ENVIRONMENT 



INVENTORY 

 (VOLUME ESTIMATE) 



PATTERN 

 (CONTOURS) 



COMPARISONS 



MODEL 



Fig. 1 Sampling objectives. 



