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o Careful planning and choice of representative sampling groups and sites according to the adopted network sampling technique , and determining certain criteria such as control sites where major sampling groups exist ( i . e . surface water points , valleys , and wells ) , impact sites where contamination is expected , such as polygons , and outlets ( e . g . treated water discharges site ) to maximise understanding the quality of urban water sources , and with the least risk of missing the correct representative sampling groups and sites .
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Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Anatomy 
Text: {0} 
Answer:
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