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- Title
Desempenho da modelagem cinemática do escoamento superficial para chuvas intermitentes em solos com cobertura morta.
- Authors
Abrantes, João R. C. B.; de Lima, João L. M. P.; Montenegro, Abelardo A. A.
- Abstract
Mulching is an important management practice for overland flow control. Antecedent soil moisture conditions, rainfall patterns, and soil cover play an important role in the detachment and transport of soil particles and runoff generation. This study aimed to investigate the performance of kinetic wave model in simulating overland flow from multiple step intermittent rainfall events, considering distinct mulch densities. Laboratory experiments were conducted using a soil flume and rainfall simulator adopting three soil cover scenarios: i) Bare soil; ii) Low mulch cover density of 2 t ha-1; and iii) High mulch cover density of 4 t ha-1. The laboratory experiments clearly show that mulch strongly affects surface runoff. Intermittency and characteristics of sequential rainfall events also influenced such process. The kinematic wave model predicted efficiently surface runoff, presenting Nash-Sutcliffe coefficients higher than 0,75 and determination coefficients higher than 0,90, for all cover conditions, when initial soil moisture was high.
- Publication
Revista Brasileira de Engenharia Agricola e Ambiental - Agriambi, 2015, Vol 19, Issue 2, p166
- ISSN
1807-1929
- Publication type
Article
- DOI
10.1590/1807-1929/agriambi.v19n2p166-172