Karakteristik Indeks Air Menggunakan Normalized Difference Water Index (NDWI) Pada DAS Negeri Rutong Kota Ambon

Abstract

The objectives of this study are analyzing the transformation of the water content of the NDWI index and the spatial pattern of its mapping in the Rutong State Watershed of Ambon City and analyzing the influence of environmental attributes on spatial patterns of NDWI index water content. The results of the transformation of the NDWI index water content and the distribution pattern of the NDWI water content for the 2010-2022 period show that changes in the distribution of NDWI water content have shifted ways that extend to coastal areas towards the mainland. The difference between the watery area and the dry area around it is visible. High water content dominates with the water content of tree vegetation begins to experience decreasing changes. In contrast, low and moderate water content increases and spreads along the coast, moving towards land areas. The spatial distribution pattern of low and moderate NDWI water content extends from coastal and inland areas to hills and mountains. The results of the analysis of the influence of environmental attributes on the spatial pattern of the NDWI index water content showed that the results of the ANOVA F-count (36,051) were more significant than the F-table (2,479), indicating that the parameters of temperature, humidity, vegetation density and type of vegetation cover had a considerable influence simultaneously on the water content of the NDWI index at a significance level (0.000) smaller than α 0.05. The results of the partial test (t-test) show that the parameters of temperature, humidity, and vegetation density have a partially significant influence on the water content of the NDWI index. While the variable type of vegetation cover has an insignificant impact on water content, the NDWI index is at a significance level of α 0.05.