Effects of neighborhood analysis window forms and derivative algorithms on the soil aggregate stability – Landscape modeling

One of the most important factors in soil-landscape analysis can be operational scale applied for mathematical calculations terrain attributes. This study aimed to investigate effects different calculation patterns on attributes and soil aggregate stability-landscape modeling at subwatershed scale. For this purpose, four (slope gradient, slope aspect, plan curvature, profile curvature) were calculated by two derivative algorithms (Evans-Young Zevenbergen-Thorne) from a one-meter digital elevation model (DEM), using neighborhood shapes (square circular) with ten scales (from 5 m 50 m). The regression tree was used modeling, Kruskal-Wallis test performed determining significant differences across patterns. results showed that curvature mostly sensitive type pattern rather than In patterns, factor, which influenced more shape or algorithm. attributes, Evans-Young algorithm, distinct between circular square neighborhoods, compared Zevenbergen-Thorne because difference polynomial type. Investigation relationship stability indicated great importance Differences R-squared values models could have remarkable models. Overall, present revealed had considerable analysis, although might changes spatial resolution DEM.