Orientador(es)
Resumo(s)
The effects on hydrological processes of the application of the landscape level measures included in the sustainable forestry initiative (SFI) program were analyzed through simulation. A landscape scenario where limitation of harvesting units’ size, imposition of a green-up interval, and establishment of streamside management zones (SMZ) were simulatedwas compared with a reference scenario where no SFI rules were followed. An intensively managed forested landscape located in
East Texas, USA, was used as the study area. The HARVEST landscape model was used to simulate landscape pattern and a modified version of the APEX model was used to simulate hydrological processes. Water and sediment yields were generally small within the observation period and most
of the runoff and erosion observed occurred during intense storm events. Water and sediment yield at the subarea level and water yield at the watershed level were similar in both scenarios. However,
sediment yield at the watershed level was higher in the non-SFI scenario. The differences were due to the reduction in channel erosion resulting from the presence of SMZs. The effect of buffer zones
in terms of sediment deposition was not different between scenarios, which can be attributed to the level slopes of the study area. Landscape measures of the SFI program, namely buffer zones, seem
important in reducing channel degradation, particularly during major storm events, in intensively managed forest landscapes in East Texas.
Descrição
Palavras-chave
APEX model East Texas Hydrological modeling Sustainable forest initiative Sediment yield Water yield Sustainable forestry
Contexto Educativo
Citação
Azevedo, João; Williams, Jimmy R.; Messina, Michael G.; Fisher, Richard F. (2005). Impacts of the sustainable forestry initiative landscape level measures on hydrological processes. Water Resources Management. ISSN 0920-4741. 19:2 (2005) p. 95-110
Editora
Springer