Rainfall simulator for soil erosion measurements | |
| Author | Chan, Edgar Uy |
| Call Number | AIT Thesis no.AE-80-13 |
| Subject(s) | Soil erosion Rainfall simulator |
| Note | A thesis submitted in partial fulfillment of the requirements for the degree of Master of Engineering, School of Environment, Resources and Development |
| Publisher | Asian Institute of Technology |
| Abstract | A field rainfall simulator, composed of three sub-units, arranged lengthwise was developed and used to simulate rainfall and measure soil loss from rectangular experimental plots. This simple apparatus was a modification of a previous one developed at AIT. The present simulator has two variations in nozzles arrangement and number; calibrated according to rainfall intensity, drop size and distribution, median volume drop diameter, kinetic energy and momentum. Variations of 6 and 12 nozzles produced rainfall intensities ranging from 25.0 to 40. 2 mm/hand 43.1 to 62.9 mm/h, respectively both with an average uniformity of water distribution of 82 percent, The kinetic energy produced was 65% of the natural rainfall, 12% higher than that produced by the previous simulator. Drop fall velocities attained 80% of the terminal velocity and an average momentum of 79.7% of the natural rainfall. Three simulated rainfall intensities, namely, 25.0 mm/h, 40.2 mm/h and 62.9 nun/h of 67.0, 67.5 and 62.4% of natural rainfall kinetic energy respectively were applied to experimental plots. Soil loss for a constant slope increases as the kinetic energy load applied is increased. Generally, the apparatus was designed for use as a research tool to aid in a more rapid evaluation of the factors that influence soil erosion, and to include runoff and infiltration in the analysis. |
| Year | 1980 |
| Type | Thesis |
| School | School of Environment, Resources, and Development |
| Department | Department of Food, Agriculture and Natural Resources (Former title: Department of Food Agriculture, and BioResources (DFAB)) |
| Academic Program/FoS | Agricultural and Food Engineering (AE) |
| Chairperson(s) | Olesen, Svend Elsnab |
| Examination Committee(s) | Aprichart Anukularmphai ; Eggers, Helmut |
| Scholarship Donor(s) | Keidanreen, Japan |
| Degree | Thesis (M.Eng.) - Asian Institute of Technology, 1980 |