Determination of groundwater quality index for irrigation and its suitability for agricultural crops in Jombang Regency, East Java, Indonesia
By: Hari Siswoyo, Gusti Ayu Mas Sri Agung, Made Dira Swantara, Sumiyati
Key Words: Agricultural crops, Groundwater quality index, Irrigation, IWQI, Jombang regency
Int. J. Agron. Agri. Res. 9(5), 62-67, November 2016.
The objective of this study was to determinate groundwater quality index for irrigation and its suitability for agricultural crops in the development area of groundwater potential for irrigation in Jombang regency. This study was based on 25 groundwater samples from bored wells at the confined aquifer by using IWQI model proposed by Meireles et al. (2010). Results revealed the IWQI value of the groundwater samples in the study area were found to be in the range 57.1–95.8, indicating the groundwater quality laid between moderate restriction and no restriction for irrigation. The agricultural land located in the areas with moderate water usage restrictions was suggested to be planted with crops that are moderately tolerant to salt, meanwhile in the areas with low water usage restrictions types of crop that are moderately sensitive and moderately tolerant to salts were suggested, and all crops tolerant to salt could be planted in the areas with no water usage restrictions.