Shevanee Ruth G. dela Cruz, Ricardo L. Fornis
This study was conducted in Barangay Badiangan, Ajuy, Iloilo City, Philippines (11°10’N, 122°58’E) to determine the effects of rainfall intensity and other rainfall-derived parameters on the directional components of splash erosion in hillslopes. There are five experimental setups with slope angles ranging from 0% to 48% were tested under natural rainfall conditions using a modified splash collector. The data collected shows that kinetic energy, slope, and rainfall intensity have shown significant effects on splash erosion. The models obtained using regression analysis are Qdet = 0.0093(KE0.80) and Qtrans = 0.060(KE0.107)(S0.700)(I200.700). The model equation performance has been validated using the Standard Error of Estimates with values of 12 and 9.4 for splash detachment and splash transport, respectively. The constants used for kinetic energy in detachment and slope in transport align with the research by Quansah (1981) for sandy soil, which is similar (the characteristics) to the soil at our research site. Additionally, rainfall intensity, especially with a 20-min duration, generated the best model as it yielded the lowest SEE value for all cases. © 2024 Technoscience Publications. All rights reserved.
College of Engineering, Central Philippine University, Jaro, Iloilo City, 5000, Philippines; School of Engineering, University of San Carlos, Talamban, Cebu City, 6000, Philippines
