Relationship between precipitation, flow, water temperature and soil use with adenovirus contamination in surface water resources 104 tive correlation only with HAdV-C. For the other variables, correlations were weak to moderate. Table 2. Correlation analysis Parameters Precipitacion Flow Temperature HAdV-C -0,875** 0,061 -0,715* HAdV-F -0,636* -0,103 -0,449 BAdV -0,109 0,036 0,057 * The correlation is significant at the 5% level. **The correlation is significant at the 1% level. To determine the clusters, firstly the average of the AdVs concentration of the four campaigns of each sampled point was determined. The cluster dendogram analysis was divided into two and three groups (Figure 3). Figure 3. Clusters dendogram proposed with separation into two and three groups, respectively In the separation in two clusters, points 1 and 4 are grouped for group (1), while for group (2) the remaining points are grouped. For the analysis in three cluster, points 1 and 4 remain in a grouping, however, points 2, 3 and 8 form a new group and points 5, 6, 7, 9 and 10 form the group (3).
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