Rill Formation and Development of Rill Networks on Sloping Reclaimed Fields during a Short Period

Abstract

To pursue development of rill networks on sloping fields during a short period, intermittent field surveys and hydrologic measurements were performed in 4 months since the construction of the sloping fields were finished. All of the rill networks formed on the fields had tree-like type of network structures and rill networks of 3rd order (Strahler ordering) were formed at early stage in the observation period. There existed close relationships between rill numbers in the rill networks and their orders but there existed no relationship between rill lengths in most of the networks and their orders at the last stage in the observation period. Furthermore, factors influencing rill formation and development of rill networks were investigated.