The hydrology of two North Carolina muck soils was simulated using four water‐management methods; conventional drainage, improved subsurface drainage, and two types of controlled drainage. One soil was much more responsive to water management than the other. For the more responsive soil, improved subsurface drainage reduced surface runoff by 192 mm/year (66%) but raised outflow by 40 mm/year (10%). Large daily flows (>25mm/day) accounted for only 11 mm/year of flow from an improved subsurface drainage system versus 31 mm/year from a conventional drainage system. Controlled drainage moderated the effects of improved subsurface drainage. Water management did not alter the likelihood of very large (>10‐year return period) runoff events on either soil. A three‐year return period event was similated for the Wasda soil on different‐size watersheds. Compared to conventional drainage, improved subsurface drainage reduced peak runoff from 101 to 28 mm/day on a 8.1‐ha field, from 68 to 20 mm/day on a 130‐ha watersh...
[1]
R. Skaggs,et al.
Predicting the effects of drainage systems on corn yields
,
1982
.
[2]
R. W. Skaggs,et al.
Drainage Control to Diminish Nitrate Loss from Agricultural Fields 1
,
1979
.
[3]
R. W. Skaggs,et al.
A water management model for shallow water table soils
,
1978
.
[4]
R. W. Skaggs,et al.
Controlled Agricultural Drainage to Maintain Water Quality
,
1986
.
[5]
N. R. Fausey,et al.
Water Management Model Evaluation for North Central Ohio
,
1981
.
[6]
F. S. Wright,et al.
Simulation of Corn Yield by a Water Management Model for a Coastal Plain Soil in Virginia
,
1988
.
[7]
James L. Fouss,et al.
Simulating subsurface drainage in the lower Mississippi Valley with DRAINMOD.
,
1987
.
[8]
J. S. Rogers,et al.
Water Management Model Evaluation for SHallow Sandy Soils
,
1985
.