|Huang, Chi Hua|
Submitted to: American Society of Agronomy Meetings
Publication Type: Abstract Only
Publication Acceptance Date: 10/31/1999
Publication Date: N/A
Technical Abstract: The objective of this lab study was to investigage effects of different parameters on runoff and sediment delivery from interrill areas. Rainfall simulations were performed with six different soils, ranging in texture from silt clay loam to silt loam, at three rainfall intensities (40; 60; 80 mm h**-1) and three slopes (7.5; 12; 16.5%). Three different soil surface conditions were investigated; 1) seedbed, 2) wet and sealed surface, and 3) dry and crusted surface. Soil loss, runoff, splash water and sediments were measured at 5 min intervals throughout each experiment. Each experiment was replicated at least once. The results show that 1) rainfall, slope and soil surface condition are important parameters affecting soil loss, 2) rainfall intensity/energy is the most significant parameter on sediment deliver from interrill areas, 3) sealing and crusting depends on soil properties and affects hydrologic processes, and 4) runoff and interrill erosion as well splash and splash erosion are highly correlated.