1. River Section Segment length (km) Total length (km) West river 0.50634.975 East river 0.53633.49 Grand Mean 0.52068.465 N * Scale applies to larger map only

2. Figure Y: Conceptual schematic of the unsupervised classification methods used on the basemap Geo-rectified infrared image with three color bands (R,G,B) Original classified image with 32 classes Unsupervised classification using the Maximum likelihood algorithm Final classified image

3. Figure 3: Unsupervised classification of land-use/ land cover in the lower Pascagoula River, MS. Primary Growth Zones High marsh Low marsh Anthropogenic structures Forest River ColorClassification. Primary Growth Zones High marsh Low marsh Anthropogenic structures Forest River ColorClassification. Primary Growth Zones High marsh Low marsh Anthropogenic structures Forest River ColorClassification. Primary Growth Zones High marsh Low marsh Anthropogenic structures Forest River ColorClassification. Primary Growth Zones High marsh Low marsh Anthropogenic structures Forest River ColorClassification.

4. Horizontal profile Salinity (‰) River mouthRiver fork Salinity (‰) Figure Z: Horizontal profile interpolation of salinity collected in December 2003.

5. Figure 7: Interpolated horizontal profiles and descriptive statistics of salinity (‰) collected during March 2003 from the east and west distributaries of the Pascagoula River, MS. (‰) WestEast Range0.02 – 0.04 0.02 – 3.36 Mean0.020.22 Standard deviation 0.0040.65 N251179

6. Figure 8: Interpolated horizontal profiles and descriptive statistics of salinity (‰) collected during May 2003 from the east and west distributaries of the Pascagoula River, MS (‰)(‰) WestEast Range0.3 – 8.53 0.4 – 14.03 Mean1.54.95 Standard deviation 2.344.48 N6341048

7. Figure 9: Interpolated horizontal profiles and descriptive statistics of salinity (‰) collected during July 2003 from the east and west distributaries of the Pascagoula River, MS. (‰)(‰) WestEast Range0 – 1.060 – 9.19 Mean0.030.52 Standard deviation 0.061.45 N16131614

8. Figure 10: Interpolated horizontal profiles and descriptive statistics of temperature (°C) collected during March 2003 from the east and west distributaries of the Pascagoula River, MS. (°C) WestEast Range 16.69 – 20.45 16.6 – 20.45 Mean16.8216.98 Standard deviation 0.270.46 N251179

9. Figure 11: Interpolated horizontal profiles and descriptive statistic of temperature (°C) collected during May 2003 from the east and west distributaries of the Pascagoula River, MS (°C) WestEast Range 26.38 – 27.92 26.52 – 28.4 Mean26.9627.06 Standard deviation 0.320.38 N6341048

10. Figure 12: Interpolated horizontal profiles and descriptive statistics of temperature (°C) collected during July 2003 from the east and west distributaries of the Pascagoula River, MS. (°C) WestEast Range 26.54 – 30.61 26.73 – 34.38 Mean27.0427.79 Standard deviation 0.421.36 N16131614