| Abstrak/Abstract |
Determination of water availability for irrigation consists of quantity and quality.
However, water quality is generally often neglected. This study aims to determine the groundwater quality in order to meet the standard of agricultural irrigation quality standard in the Lobalain District, East Nusa Tenggara Province, Indonesia. The results showed that the groundwater quality with a predominantly pH value did not meet the standard . The none restriction on use class dominated the total dissolved solids (TDS) value. The average electrical conductivity (EC) value is less than 750 ݏߤ/cm. The chloride is dominated by less than the tolerance threshold (Cl-<4.0 meq/l), for sulfate (SO4), which is within the threshold (<20 meq/l), and the nitrate (NO3N) dominated as slight to moderate. The boron (B) showed positive results, which in all areas was very satisfactory because it is below the tolerance threshold (B<0.7 mg/l). The sodium percentage (Na%) analysis was dominated by excellent and good class, and the excellent category dominated the sodium adsorption ratio (SAR). Eight locations are highly recommended as agricultural irrigation sources due to their groundwater quality. Only one location is not recommended in Kuli Village because only three parameters (Na%, EC, and Cl-) meet the irrigation water quality standard. |
