Erosivity index of North-East Thailand | |
| Author | Rab, Md. Abdur |
| Call Number | AIT Thesis no.AE-79-21 |
| Subject(s) | Soil conservation--Statistics Soil conservation--Research--Thailand, Northeastern |
| 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 | Eleven automatic raingage stations were selected on the basis of length of records of available data. The minimum length of record was taken as eight years. The automatic rainfall data were analyzed and erosivity index-values were computed by adding the kinetic energy of rain having intensity greater than 25 mm per hour. The average annual, wet-season and monthly iso-erosivity maps of North-East Thailand were produced to read the rainfall factor in Universal Soil Loss Equation. The annual and wet-season iso-erosivity maps at 50 and 80 percent probability of occurrence were also produced for designing erosion control measures with the desired probability level. The monthly distribution of erosivity index curves for eleven locations in North-East Thailand were produced for the use in selecting proper crop-management factors. Annual average erosivity index in North-East Thailand ranges from 9000 to 15000. The annual average erosivity index at ThaTum was found to be 1.7 times greater than that at Udon Thani. Two types of variation of erosivity index in North-East Thailand were observed, namely seasonal variation and variation due to locality; or in other words, it varies with time and space. The results of study show that, in May erosivity index increases from Udon Thani to Sakon Nakhon, in June it increases from Udon Thani to Roiet, in July it increases from Loei to Roiet, in October erosivity index ranges from 500 to 1500 and it increases from Udon Thani to Nakhon Ratchasima. These variations of erosivity index should be considered in the planning of erosion control measures in North-East Thailand. |
| Year | 1979 |
| 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) | Apichart Anukularmphai |
| Examination Committee(s) | Olesen, Svend Elsnab ;Eggers, Helmut |
| Scholarship Donor(s) | Norway Government |
| Degree | Thesis (M.Eng.) - Asian Institute of Technology, 1979 |