| Summary: | 碩士 === 國立屏東科技大學 === 水土保持系所 === 106 === This study focused on the runoff discharge variation after storm events and setting hillside ditch with cover treatment for a slopeland mango orchard, which is located at the outdoor classroom of soil and water conservation, National Pingtung University of Science and Technology. The plot area was 0.3 hectare, and all the runoff observation was conducted from April to September, 2017. The results had summarized as: the observed runoff coefficient was less than reference from Technical Regulations for Soil and Water Conservation, Council of Agriculture, Executive Yuan. The measured time of concentration was delayed the estimation computed by Rziha’s experimental formula. The maximum peak flows of observed period was 0.0169 cms, which compared with the estimate the peak flow by rational formula with 2-year return period was 0.054 cms, it had shown the slopeland orchard with hillside ditch and full cover would reduce runoff effectively.
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