Hydraulic properties

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