| Author | Chumporn Komsartra |
| Call Number | AIT Thesis no. 278 |
| Subject(s) | Watersheds--Thailand
Hydrology--Thailand
|
| Note | A thesis submitted in partial fulfillment of the requirements for the degree of Master of Engineering of the Asian Institute of Technology, Bangkok, Thailand |
| Publisher | Asian Institute of Technology |
| Abstract | The object of this study is to develop a method for the determination of the peak rate of runoff and the design hydrograph from small ungagged watersheds of drainage area up to 1000 square kilometers. Flood hydrographs from five small watersheds were analyzed. The mathematical model, a two parameter gamma distribution, were fitted to the observed hydrograph but the mathematical model does not fit
the data very well. It has been concluded that the average dimensionless unit hydrograph, is recommended for determination of design hydrographs for a tropical region such as Thailand. The hydrograph parameters are
correlated to four measurable watershed characteristics, watershed area (A), length of main stream (L), length of the stream up to the center of the watershed (Lc) and slope of the longest watercourse (S). Two
simple empirical equations from regression analysis are presented for determination of hydrograph parameters, peak discharge and time to peak
which can be used to derive the complete hydrograph. The method is suitable for use in the design of small hydraulic structures such as diversion works, culverts and highway drainage which usually are
constructed on an ungagged watershed. |
| Year | 1969 |
| Type | Thesis |
| School | Student Research Before 1980 |
| Department | Other Field of Studies (No Department) |
| Academic Program/FoS | Thesis (Year <=1979) |
| Chairperson(s) | Schulz, Edmund F. |
| Scholarship Donor(s) | Asian Institute of Technology |
| Degree | Thesis (M. Eng.) - Asian Institute of Technology, 1969 |
