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Surface runoff and sediment production from different timber yarding practices, some using Best Management Practices (BMPs) recommended for Honduras, were monitored in experimental plots during the rainy seasons of two consecutive years in pine forest highlands of central Honduras. Different timber yarding systems were applied to pseudo-replicated plots during the rainy seasons of 1999 and 2000. In 1999, two treatments were studied: tractor yarding and skyline cable (a recommended BMP). In 2000, four treatments were evaluated: tractor skidding, skyline cable, animal skidding (another recommended BMP), and undisturbed forest (reference). During the rainy seasons of these years, surface runoff volumes and sediment yield were measured at five 1.5m x 10m erosion plots in each treated area. The results showed significant differences between traditional tractor yarding and the recommended skyline cable and animal skidding methods. Tractor yarding produced six to ten times more erosion during the rainy seasons than cable and animal yarding. The improved soil retention of cable and animal yarding was especially important during September when the highest rainfall occurred in this climate. A produção do escorrimento de superfície e do sedimento das práticas diferentes do carregamento da madeira, algumas das melhores práticas de gestão de utilização (BMPs) recomendadas para Honduras, foi monitorada em lotes experimentais durante as estações das chuvas de dois anos consecutivos em montanhas da Floresta do Pinho de Honduras. Os diferentes sistemas do carregamento da madeira foram aplicados aos lotes pseudorreplicados durante as estações das chuvas de 1999 e de 2000. Em 1999, dois tratamentos foram estudados: cabo do carregamento e do trator (um BMP recomendado). Em 2000, quatro tratamentos foram avaliados: sistemas do carregamento da madeira do trator, cabo, animal e floresta imperturbada (referência). Durante as estações das chuvas desses anos, os volumes do escorrimento de superfície e o rendimento do sedimento foram medidos em cinco lotes da erosão de 1,5 m x 10 m em cada área tratada. Os resultados indicaram diferenças significativas entre o carregamento tradicional do trator e o do cabo e do animal. O carregamento do trator produziu 6 a 10 vezes mais erosão durante as estações das chuvas do que o carregamento do cabo e do animal. A retenção melhorada do solo do carregamento do cabo e do animal foi especialmente importante durante o mês de setembro, quando ocorreu a precipitação mais elevada

Evaluation of the surface erosion from different timber yarding methods in Honduras