Evaluation on Rainwater Harvesting Suitability in Indonesia
- Case Study of Four Small Farm Reservoirs in Wonosari Village, Central Java, Indonesia -
2017 年 22 巻 2 号 p. 19-24
詳細
2017 年 22 巻 2 号 p. 19-24
Erratic rainfall as an effect of climate change has become a serious problem for agricultural development in Indonesia. Rainwater harvesting technology (RWH), which has been successfully applied in several areas in the world, exhibits great potential as a method of addressing this issue. In the present study, we analyze the benefit-cost ratio (B/C) of two lining materials, tarpaulin and concrete to evaluate the suitability of four small farm reservoirs (SFR). The results are as follows. (1) Applying SFR is economically beneficial, as indicated by the income increase through the rise of yield possibility in the 2nd crop season. (2) It is important to estimate the optimum irrigation area in order to obtain the maximum B/C value. (3) The relationship between the B/C value, the catchment area, and the SFR volume is clarified for the optimum irrigation area. (4) SFR concrete is more acceptable than tarpaulin in terms of the B/C value due to its longer depreciation period with less running cost.
