Figure 2.1.
![Map with the location of measurement and control points [21]](https://sciendo-parsed.s3.eu-central-1.amazonaws.com/682600dbf788d76dad43fd67/j_acee-2025-0013_fig_001.jpg?X-Amz-Algorithm=AWS4-HMAC-SHA256&X-Amz-Content-Sha256=UNSIGNED-PAYLOAD&X-Amz-Credential=ASIA6AP2G7AKFDGEV5LZ%2F20251215%2Feu-central-1%2Fs3%2Faws4_request&X-Amz-Date=20251215T125412Z&X-Amz-Expires=3600&X-Amz-Security-Token=IQoJb3JpZ2luX2VjEIP%2F%2F%2F%2F%2F%2F%2F%2F%2F%2FwEaDGV1LWNlbnRyYWwtMSJHMEUCIHIHMV9AE5pbYMuQ3sVDqAaX9nZosk410GnjE04p596PAiEA67NJUu1x1LnCIckcgWJ%2BtbqmZM%2F9oA2Gz4X7xh9Bn9QqvAUITBACGgw5NjMxMzQyODk5NDAiDP8rf5lMaXZmBfF%2FiyqZBYQcZSr3j%2BkD2seQz%2FZ990KOButZbsrR96QYfoqSncaLuZHjySmoxrMQxto3RMkJgC0EVKZA83YrLIOTTGRUovsK6YDSCyP3X0Xfp5NTun33V1Wa6LYFerKHzAlCtibhhQrbkbnNv8rVn64CH%2FhqQRw4183Y8jO0YEGeUbtYKbqEh%2BiMUceUdEGe7q2vTm3fXe%2FAZsyOjC%2BBAMfc0JZa%2Fz23anBPxe5srDorecaJmDrPu1nLJhHkvrK87rHqSa7DX%2F3GYhnpVxwfjuvQmFMUJLYWS4v9Fc9h%2FhVYZjcmKJQaSmSNUrvi%2FGtTq17LnRywKmtBciHKEcWElA6YGWDhgj3Jnz67CctsKU2jg8%2BR0Jt37A%2Bd6Nds8qMh1kJNDQLcgABr5u9r2kjG0K5YVxKKBOIxB3EgjZRBp6%2ByRe3QExSbuuFu5B9FgF0nmdflA1Ojlc9%2F5TnURVCtM8Oi5H6QFWwtS7gX9lPLICcuS3e9bLhsoZJy%2F6L3LKmackyYwuF1jSDfz6B1M%2FA4oonxXU1u4UfynzEyT7a7kTFmyxEJJOnm89QHUIRbVPSLzLFeHmkgPN5wLZnJ5HQhpWYxOOc3nFf2v%2FClxiONO18%2F3eSCCw%2BqCyJEj7sHtnZzQMxFWek1eP5pfKxw767UIDz4%2B8LdkoE0PeH5xnzNfz%2FEJn0mis6lAEbEfgVxn%2FiXEAQgIqY4xzq2nsSMEGk1aYEaa7PEN7x8ak1k7HJp20RcmQXJGDvAcds4MW6xxEPqEVNKN%2BQyXCob%2BfgrPapVXluEVY3n25XGVOaX05PYT9b9kmKZ5TyMiYM3QtOuG9Een6eizJie2UVN32OuiP6FCyvm9HUFXdD063GaCb7GAiAsZzkdwcujN5AlaYIeqgxJMIvW%2F8kGOrEBwiI8IbVMf%2Fm%2BX1TdujsaqW%2FLqPrj5tu39FXWF3ms9ydYds8zrwX5olJHWRvUHikaWgs%2BP%2F1C%2BjhXmXqbXTL2Vbi27TYDIqwujkYAaOb3ObfPvD2Rf0y0IlvsiHlRoDBQCrovtzDX0XSzpIm08%2BAko24ZffyhWsDsOFKMG%2F5D7dR8KA2H89ZwZRi9lEOMNweBM0q6zg0k4rMyll6Dbrvee%2BUgIbsz9QRC25LjjFjjiQct&X-Amz-Signature=dfcbe332e196f4f0d7ffafb310e8a676de36a0f3ff7c3387970238f8e666ec1e&X-Amz-SignedHeaders=host&x-amz-checksum-mode=ENABLED&x-id=GetObject)
Figure 3.1.
Figure 3.1.
Figure 3.3.
Figure 3.4.
Figure 3.5.
Figure 3.6.
Figure 3.7.
Figure 3.8.
Figure 3.9.
The values of the Pearson correlation coefficient (R) calculated for the examined indicators
| pH | Dissolved oxygen | Conductivity | Chlorophyll „a” | |
|---|---|---|---|---|
| pH | 1 | 0.0599 | 0.1001 | 0.0202 |
| Dissolved oxygen | 0.0599 | 1 | 0.1038 | 0.3977 |
| Conductivity | 0.1001 | 0.1038 | 1 | 0.3568 |
| Chlorophyll „a” | 0.0202 | 0.3977 | 0.3568 | 1 |
Trophic status of water basins in Siemiatycze, based on limits of chlorophyll “a” concentration developed by the OECD, Nuremberg & Forsberg and Ryding [22, 23, 24]
| Period | Chlorophyll “a” - average [µg/dm3] | OECD | Forsberg and Ryding | Nürnberg |
|---|---|---|---|---|
| Spring | 22.92 | Eutrophy | Eutrophy | Eutrophy |
| Summer | 44.19 | Hipertrophy | Hipertrophy | Hipertrophy |
| Autumn | 11.06 | Eutrophy | Eutrophy | Eutrophy |
| Winter | 6.49 | Mezotrophy | Mezotrophy | Mezotrophy |
| Year | 21.17 | Eutrophy | Eutrophy | Eutrophy |
The results of the markings in the Siemiatycze reservoir in ???
| Designation [unit] | Season | All measurement and control points | |||||
|---|---|---|---|---|---|---|---|
| Value | Median | Standard deviation | Statistical error | ||||
| minimum | average | maximum | |||||
| Chlorophyll [µg /dm3] | Autumn | 5.23 | 11.06 | 19.61 | 10.74 | 4.40 | 1.18 |
| Winter | 3.51 | 6.50 | 10.17 | 5.98 | 2.19 | 0.59 | |
| Spring | 12.21 | 22.92 | 33.87 | 23.63 | 5.72 | 1.53 | |
| Summer | 31.86 | 44.20 | 54.98 | 42.18 | 7.21 | 1.09 | |
| The entire research period | 3.51 | 21.17 | 54.98 | 16.23 | 15.57 | 2.08 | |
| The pH [pH] | Autumn | 7.67 | - | 8.03 | - | - | - |
| Winter | 6.30 | - | 7.03 | - | - | - | |
| Spring | 7.15 | - | 9.15 | - | - | - | |
| Summer | 6.96 | - | 7.11 | - | - | - | |
| The entire research period | 6.30 | - | 9.15 | - | - | - | |
| Dissolved oxygen [mg O2/dm3] | Autumn | 8.17 | 8.71 | 9.60 | 8.72 | 0.45 | 0.12 |
| Winter | 8.70 | 9.56 | 10.40 | 9.52 | 0.63 | 0.17 | |
| Spring | 6.44 | 8.88 | 6.44 | 8.96 | 1.35 | 0.36 | |
| Summer | 7.25 | 8.40 | 7.25 | 8.33 | 0.74 | 0.20 | |
| The entire research period | 6.44 | 8.89 | 11.14 | 8.83 | 0.94 | 0.13 | |
| Conductivity [µS/cm] | Autumn | 239.40 | 302.71 | 354.90 | 309.70 | 35.83 | 9.58 |
| Winter | 231.74 | 320.54 | 507.21 | 263.64 | 109.87 | 29.36 | |
| Spring | 225.86 | 320.39 | 396.79 | 325.13 | 51.86 | 13.86 | |
| Summer | 312.80 | 368.57 | 464.40 | 367.20 | 44.40 | 11.87 | |
| The entire research period | 225.86 | 328.05 | 507.21 | 321.55 | 69.78 | 9.32 | |