Hydraulic properties |
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Field capac. (FC, %vol.) (c) | 36 | 27 | 19 | 17 | 37 | 35 | 36 | 36 |
Wilting point (WP, %vol.) | 18 | 14 | 10 | 8 | 22 | 21 | 21 | 22 |
| Runoff & soil loss properties | Runoff & soil loss properties | ||||||
Parameter | Value | Selection criteria | Reference | Value | Selection criteria | Reference | ||
Hydrological group (HGRP) | B / C | appropriate for soil type | FOCUS definition | C | appropriate for soil type | FOCUS definition | ||
USLE K factor (USLEK) | 0.19 | sandy loam, 4% OM | PRZM manual | 0.25 | clay loam, 1% OM | PRZM manual | ||
USLE LS factor (USLELS) | 0.66 | 45 m length, 5% slope | PRZM manual | 0.66 | 45 m length, 5% slope | PRZM manual | ||
USLE P factor (USLEP) | 0.50 | contouring, 5% slope | PRZM manual | 0.50 | contouring, 5% slope | PRZM manual | ||
Area of field (AFIELD) | 0.45 ha | assumption for scenario | FOCUS definition | 0.45 ha | assumption for scenario | FOCUS definition | ||
IREG | 2 | heavier winter rain | FOCUS definition | 3 | even seasonal rain | FOCUS definition | ||
Slope (SLP) | 5% | 20% slope, terraced to 5% | FOCUS definition | 5% | 10% slope, terraced to 5% | FOCUS definition | ||
HL | 20 m | assumption for scenario | FOCUS definition | 20 m | assumption for scenario | FOCUS definition | ||
Manning’s coefficient | 0.10 | fallow, no-till or coulter | PRZM manual | 0.10 | fallow, no-till or coulter | PRZM manual |