| Author | Ahmad, Shahid |
| Call Number | AIT Thesis no.AE-80-04 |
| Subject(s) | Irrigation farming--Pakistan--Punjab
|
| Note | A thesis submitted in partial fulfilment of the requirements for the degree of Master of Engineering, School of Environment, Resources and Development |
| Publisher | Asian Institute of Technology |
| Abstract | Irrigation water management is becoming more important, as irrigation
competes for limited water supplies and energy, and as the lands, throughout
the world degrade and decline in productivity, because of poor water manage
ment. Irrigation Scheduling is predicting the time and amount of the next one
or more irrigations, taking into account expected precipitation. Practical
irrigation scheduling technology considers rainfall and evapotranspiration
since the last irrigation, the allowable soil water depletion at the present
growth stage and the expected rainfall before the next irrigation.
Irrigation s cheduling i s a deci sion making process that irrigation
extension worker/farmer encounter daily or weekly. They can make better
decisions if more specific information about crop evapotranspiration and the
current soil water status are available in a simplified way for extension to
the farmers fields. The type of scheduling information desired by the farmers/
extension workers in Punjab of Pakistan, depends on the flexibility to adjust
scheduling practices within the existing irrigation system on weekly turn
basis.
The computer model of irrigation scheduling is designed to compute the
irrigation water requirements for selected crops in the Punjab province of
Pakistan, based on weekly intervals of planting dates in appropriate season,
upon specific Punjab soil moisture characteristics, crop characteristics as
rooting depth and ratio of actual to potential evapotranspiration as experi
mentally obtained. The methodology, input data requirements, and results of
irrigation schedules of eight crops are presented. The irrigation scheduling
results (computer outputs) are simplified into a manual for the extension of
practical irrigation scheduling to the farmers' fields in Pakistan. The
manual presented is based on the actual water requirements estimated using
the model and then adjusted to suit the conditions of water supply on weekly
turn basis. This manual will provide the base for the extension of new
water management technology for increased crop production in the Punjab
province of Pakistan. |
| 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) | Apichart Anukularmphai |
| Examination Committee(s) | Early, Alan C. ;
Eggers, Helmut ;Olesen, Svend Elsnab
|
| Scholarship Donor(s) | The Government of Norway |
| Degree | Thesis (M.Eng.) - Asian Institute of Technology, 1980 |