Table 2.
Soil organic matter (SOM) contents of topsoil samples from the basins of the four major rivers in the Republic of Korea.
| Soil Sample | Count | SOM (g kg−1) | ||||
|---|---|---|---|---|---|---|
| Min. | Max. | Ave. | Std. | |||
| Total | 138 | 8.00 | 77.03 | 32.44 | 19.23 | |
| GR (a) | Total | 48 | 8.85 | 72.80 | 27.39 | 13.09 |
| WA (e) | 25 | 8.85 | 72.80 | 28.74 | 14.31 | |
| DWPZ (f) | 23 | 10.40 | 55.08 | 25.91 | 11.12 | |
| NR (b) | Total | 25 | 11.14 | 75.46 | 52.61 | 20.70 |
| WA | 10 | 11.14 | 73.91 | 38.82 | 18.77 | |
| DWPZ | 15 | 26.23 | 75.46 | 61.80 | 15.47 | |
| YSR (c) | Total | 35 | 10.82 | 77.03 | 37.83 | 17.93 |
| WA | 15 | 10.82 | 77.03 | 39.06 | 19.56 | |
| DWPZ | 20 | 12.75 | 65.71 | 36.91 | 16.06 | |
| HR (d) | Total | 30 | 8.00 | 44.71 | 17.44 | 8.77 |
| WA | 23 | 8.00 | 44.71 | 15.57 | 8.30 | |
| DWPZ | 7 | 13.71 | 33.76 | 23.58 | 6.58 | |
(a) GR: Geum River, (b) NR: Nakdong River, (c) YSR: Yeongsan and Seomjin River, (d) HR: Han River, (e) WA: Waterfront Area, (f) DWPZ: Drinking Water Protection Zone.