Net present value (NPV) of the rehabilitated irrigation channels to increase agricultural production

The Indonesian government created the Technical Guidelines for the Acceleration of Water Use Improvement (P3-TGAI) to enhance the economy of several communities and to support food self-sufficiency. This research was, therefore, conducted to analyze the performance improvement of the irrigation network management program at P3-TGAI. This involved evaluating the increase in irrigated rice fields due to the rise in the quality and quantity of irrigation canal construction and determining the level of satisfaction of the P3-TGAI beneficiaries using Spearman rank correlation analysis. The results showed that the irrigation channels rehabilitated with brick construction increased irrigation water discharge from 19.25 l/sec to 40.25 l/sec and this further increased the area of irrigated rice fields by 25.2 hectares. This was observed to be due to the increment in the length of the channel from 446.2 m to 507 m. Moreover, canals rehabilitated with light concrete construction increased the flow of irrigation water from 18.50 l/sec to 27.75 l/sec and this caused the area of irrigated rice fields to increase by 11.1 Ha. This was discovered to be due to the increment of the channel length to 1,220 m. Furthermore, the Benefit-Cost Ratio (B/C) ratio of the concrete lining construction was recorded to be 6.79> 0 while the brick construction had 14.53> 0. Therefore, the canal rehabilitated using concrete lining construction is considered better. The level of correlation between P3-TGAI farmer participation was found to be 0.841**. It was also discovered that the satisfaction level of farmer groups with concrete construction was 0.815** while those with brick construction was 0.864 **. This means the farmers prefer a better-quality level of irrigation network than adding more length to the canals as indicated with a confidence level of 0.932 ** and a significance level of 0.01. The findings showed the farmers are delighted with the P3-TGAI program conducted independently with the assistance of government funds.