Pusat Penyelidikan Kejuruteraan Sungai dan Saliran Bandar (REDAC) - Tesis

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Browsing Pusat Penyelidikan Kejuruteraan Sungai dan Saliran Bandar (REDAC) - Tesis by Author "Nadiatul Amira, Ab Ghani"

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    The design and economic feasibility of individual on-farm pond (i-ofp) for supplementary irrigation in paddy field
    (2024-01-01)
    Nadiatul Amira, Ab Ghani
    This study proposes the individual on-farm pond (i-OFP) as a solution to overcome the irrigation water shortage problem in the paddy field. A methodology to design the i-OFP for additional irrigation is established, and its economic feasibility is studied. The i-OFP is used to collect and store the return flow from the paddy field, and the water is utilized during dry season. To establish the methodology, field data such as inflow discharge into the paddy field during the main and off-season inflow water depth at the irrigation channel was collected. By applying the principle of mass conservation, a simple water balance model is built to estimate the maximum amount of return flow from the paddy field during field flooding. The return flow was utilized to design the individual on-farm pond (i-OFP), and both the inlet and outlet flow control structures. During high water demand and dry period, the return flow collected and stored in i-OFP will be used for additional irrigation. Furthermore, the economic feasibility of the i-OFP system is assessed by using the present value (PV) method. The study's findings revealed that a simple methodology may be used to build an i-OFP for water reuse and additional irrigation. According to the economic feasibility analysis results, the i-OFP system might generate a positive economic return if the initial construction and maintenance costs of the system are fully subsidized. Results from the study may be used as a guide for the construction of on-farm ponds and provide insights into the economic feasibility of i-OFP.