| Author | Husain, Nazim |
| Call Number | AIT Thesis no. 21 |
| Subject(s) | Water-storage|xThailand|xChao Phraya River
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| 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 | This thesis presents a study of the storage requirements in the Chao Phraya River System. An account is given of the investigations made in order to determine the reservoir storage required in the Chao Phraya River and its four main headwater tributaries (Ping, Wang, Yom and Nan) for several assumed rates of draft.
The study has been undertaken with a view to achieving maximum utilization of the waters of the Chao Phraya River system. The analysis has been facilitated by the availability of a long-term record at Ayuthia showing the maximum flood-stage of the Chao Phraya River attained during each of the past 130 years. The long-term runoff variation has been investigated based on a correlation between annual runoff at Wad Tha Hard and maximum water level at Ayuthia. Application of the present record at Wad Tha Hard to the past staff gauge readings at Ayuthia furnishes a reconstruction of past flows.
A differential mass-curve analysis has been made to determine the storage requirements for various specified flows at Wad Tha Hard by taking into account the record of annual runoff, both actual (1905–55) and computed (1831–1960). From the analysis of the actual record, the value of k, the storage index in Hurst’s equation, comes out to be 0.67, which agrees very well with the mean value of 0.72 derived by Hurst. The results have been compared with those obtained by applying Hurst’s equation relating the maximum annual deficit with the draft to be guaranteed. For low rates of draft, requirements have been determined by using normal probability paper.
There being a strong correlation between the seasonal distributions in the tributaries and at Wad Tha Hard, the results of the analysis can be applied without reservation to ungauged tributary sites for low rates of draft. For high draft rates, caution must be observed because the correlation of annual flows is somewhat weaker. |
| Year | 1962 |
| Type | Thesis |
| School | Student Research Before 1979 |
| Department | Other Field of Studies (No Department) |
| Academic Program/FoS | Thesis (Year <=1979) |
| Degree | SEATO Graduate School of Engineering, 1962 |