Figure 2a. Map showing the spatial distribution of Heavy metal Evaluation Index (HEI) score for dry season.

From

Water Quality Assessment by Pollution Indices in Eastern Obolo Coastline Communities of Nigeria

Igbemi Arthur Igbemi, I. L. Nwaogazie, O. Akaranta, G. O. Abu

American Journal of Water Resources. 2019, 7(3), 111-120 doi:10.12691/ajwr-7-3-4