Soil erosion analysis in bamboo-planted sites using paired catchment approach
Journal Title: Journal of Biodiversity and Environmental Sciences (JBES) - Year 2017, Vol 11, Issue 5
Abstract
The influence of bamboo to deter soil erosion rates has already been widely recognized and accepted. However, analysis of erosion reduction owing to the absence or presence of bamboo in a catchment scale still has yet to be established. This paper examines the variability of soil erosion between two catchments using a paired catchment method. The approach involves two adjacent catchments, one as a control and another as a treatment, which is simultaneously monitored during the calibration and post-calibration or treatment periods. Erosion rates were collected in 2013 to 2015 on a per event basis. Using the analysis of covariance at 5% significance, the study revealed that the erosion mean value within the treated catchment had decreased dramatically by a factor of 6.5 between the calibration and treatment periods. Based on the calibration regression equation using the predicted and observed mean values, an overall 21% reduction in mean erosion was obtained due to the presence of bamboo in the treatment catchment. The findings offer a baseline information on the influence of bamboo to soil erosion using the paired catchment approach although longer observation period is expected to minimize biased estimate of the treatment effects. Nevertheless, the study able to show that the relationship of the considered variable between the control and the treatment catchments has existed. The results suggest that planting of bamboo is as good as best management practice in controlling soil erosion at a catchment-scale particularly in the marginal and sloping landscape.
Authors and Affiliations
George R. Puno, Rico A. Marin
Keywords
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