Flood magnitude in Thailand in relation to return-period, mean flow and catchment area | |
| Author | Ahmad, Bashir |
| Call Number | AIT Thesis no. 20 |
| Subject(s) | Floods|xThailand Floods|xThailand Floods|xThailand Floods|xThailand |
| Note | A thesis submitted in partial fulfillment if the requirements for the degree of Master of Engineering in the SEATO Graduate School of Engineering, Bangkok, Thailand. |
| Publisher | Asian Institute of Technology |
| Abstract | The thesis is a study of the flood records of the past 50 years, made with the object of finding indices and formulae descriptive of the flood regime, for use in the design of hydraulic works in Thailand and hydrologically similar regions. Floods are studied from the standpoint of frequency — which has a considerable bearing on the economy of development projects — and in terms of two of the most basic elements in flood estimation: the mean flow and catchment area. The rivers of Thailand can be classified as normal or flashy. In the first category, the severer floods are likely to be from 3 to 12 times the mean flow; in the second, from 8 to 50 times the mean. Overall, the flood potential is moderate compared with other regions — notably India, where discharges are about five times as large, and the United States, where they are about three times as large. In relation to catchment area, the coefficient k in the formula Q=kA1/2 varies from 7 to 40 for floods of 25-year return period, when Q and A are measured in metric units (m³/s and km²). The family of curves represented by Q=90(1+0.37logT)A0^.3 is indicative of the maximum floods likely to be experienced in catchments of 2,000 to 200,000 km² in extent. |
| Year | 1962 |
| Type | Thesis |
| School | Student Research Before 1979 |
| Department | Other Field of Studies (No Department) |
| Academic Program/FoS | Thesis (Year <=1979) |
| Degree | Thesis (M.Eng.) - SEATO Graduate School of Engineering, 1962 |