In the multifractal analysis, the singular index α reflects the fluctuation phenomenon's local irregularity in the sequence. The larger the value is, the lower is the singularity and the smoother is the data sequence in this part. Δα is also referred to as the multifractal characteristic parameter or fingerprint (Zhao 2018).
Characteristic values of the spring water EC
| Spring . | Max. (μS·cm−1) . | Min. (μS·cm−1) . | Mean (μS·cm−1) . |
|---|---|---|---|
| Heihu spring | 954 | 831 | 895 |
| Baotu spring | 858 | 722 | 777 |
| Tanxi spring | 776 | 671 | 707 |
| Wangfuchizi | 718 | 622 | 685 |
| Spring . | Max. (μS·cm−1) . | Min. (μS·cm−1) . | Mean (μS·cm−1) . |
|---|---|---|---|
| Heihu spring | 954 | 831 | 895 |
| Baotu spring | 858 | 722 | 777 |
| Tanxi spring | 776 | 671 | 707 |
| Wangfuchizi | 718 | 622 | 685 |