Water salinity variability mapping for flooded paddy plots at Kuala Kedah, Malaysia

Salinity is an essential parameter in rice cultivation activity. It has a significant impact on paddy growth and also the yield of paddy. However, level salinity concentration plots depends surrounding conditions. The distance area from coastline, temperature intensity rainfall should be considered studies involving water quality. Additionally, tide events included this study because position near coastline. Therefore, was conducted to assess two different seasons describe using variability map Inverse Distance Weighted (IDW) interpolation method. data collection activities involved sampling at 44 inlets for each plot 30 hectares by referring Day After Sowing (DAS) as paddy’s stage. These samples were collected 10 DAS, 40 60 DAS subsequently tested portable conductivity meter namely EC500 Exstick II pH/Conductivity/Temperature Meter. Parallelly, georeference which latitude, longitude elevation gathered Garmin GPSMAP 64s. Then, these analyzed IDW method ArcGIS software comes with maps. produced maps give overview distribution color scale range. Based maps, highest recorded during Season 1 2019 2 2019, respectively both tidal events. This result shows that trend due amount received compared mean factor. Keywords: GIS, interpolation, oryza sativa , rice, saline water, seawater encroachment