Interpretation of the behaviour of agrowell systems in Sri Lanka using radial flow models |
| |
| Authors: | C S DE SILVA K R RUSHTON |
| |
| Institution: | 1. Agricultural Engineering Division, Faculty of Engineering Technology , The Open University of Sri Lanka , Nawala, Nugegoda, Sri Lanka;2. School of Civil Engineering, University of Birmingham , Edgbaston, Birmingham, B15 2TT, UK |
| |
| Abstract: | Abstract This paper describes a study of the use of large diameter “agrowells” used for irrigation in Sri Lanka. Detailed field information for a single location is presented and a numerical radial flow model was used to interpret the field response. Initially the model was used to represent a pumping test in which the pumping and subsequent recovery were monitored. It was then used to investigate the operation of the well during a dry season. Satisfactory agreement could only be obtained when account was taken of the withdrawal of water from below the water table by trees. From the simulation it was possible to show that skilful farming practice could be used in steadily exploiting the resources for irrigation over the whole of the dry season. |
| |
| Keywords: | |
|
|
