Soil erosion processes and sediment enrichment in a well-aggregated, uniformly-textured oxisol.

摘要

The basic primary and secondary processes of soil erosion by water are not well understood for Hawaii's soils despite substantial research and empirical information on overall factors. A series of laboratory and field rainfall simulation experiments were conducted to study the mechanisms and processes of soil erosion and sediment enrichment in a well-aggregated and uniformly-textured Oxisol from the island of Oahu, Hawaii. Interrill splash and wash were partitioned with a specially-designed laboratory device under varying rainfall intensity and slope conditions. It was indicated that both splash and wash can be predominant erosion processes, depending on slope and runoff conditions. The power function, E = alThe quality of detached sediment was determined in association with the above interrill splash and wash and rill erosion processes. With splash, sediment sizes (aggregates) varied with directional components and were generally coarser than with wash. Enrichment of aggregates