Effects of Digital Elevation Model (DEM) Spatial Resolution on Soil Landscape Analysis (Case study Raakat watershed of Izeh, Khuzestan Province)

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Khanifar Javad; Khademalrasoul Ataallah; Amerikhah Hadi

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Journal: APPLIED SOIL RESEARCH Year:2020 | Volume:8 | Issue:1 Page(s): 121-135

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Information Journal Paper

Title

Effects of Digital Elevation Model (DEM) Spatial Resolution on Soil Landscape Analysis (Case study Raakat watershed of Izeh, Khuzestan Province)

Author(s)

Khanifar Javad | Khademalrasoul Ataallah | Amerikhah Hadi | Issue Writer Certificate

Keywords

Sediment transportation index (STI)Q2

GeomorphometryQ1

DEMQ2

AICCQ1

optimized spatial resolutionQ1

Abstract

The most important factors which are effective for landscape analysis is spatial resolution of digital elevation model (DEM). In this study, the effect of spatial resolution on soil parameters and modeling of soil properties have studied. For this research 6 parameters including (height, slope gradient, slope aspect, minimal curvature, upland area and sediment transportation index) from 5 different spatial resolutions (10, 30 (base), 60, 90 and 120) have originated and for modeling of soil properties (soil texture, K, P, EC, pH and soil depth) have used. The differences between mean of each parameter of spatial resolutions accomplished using Kruskal-Wallis test and multi linear regression, then the best model in each spatial resolution was selected based on AICC index. Our results depicted that with coarser DEM, the mean of slope gradient (G), sediment transportation index (STI) and the minimum curvature (Cmin) were decreased whereas the mean and minimum of upslope area (UP) was enhanced. Statistical indices of height showed the low sensivity to spatial resolution variations. Changes of mean and maximum slope aspect in different spatial resolutions have no regular trend. Only minimum curvature and upland area have significant difference relating to different spatial resolutions. With changes of DEM spatial resolution, the best combination of parameters for modeling of soil properties and AICC and R2adj will be change. Finally, our results illustrated that for an area with high variability of geomorphic conditions, there is no capability to use only one specific resolution for all soil properties...

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APA: Copy

Khanifar, Javad, Khademalrasoul, Ataallah, & Amerikhah, Hadi. (2020). Effects of Digital Elevation Model (DEM) Spatial Resolution on Soil Landscape Analysis (Case study Raakat watershed of Izeh, Khuzestan Province). APPLIED SOIL RESEARCH, 8(1 ), 121-135. SID. https://sid.ir/paper/393002/en

Vancouver: Copy

Khanifar Javad, Khademalrasoul Ataallah, Amerikhah Hadi. Effects of Digital Elevation Model (DEM) Spatial Resolution on Soil Landscape Analysis (Case study Raakat watershed of Izeh, Khuzestan Province). APPLIED SOIL RESEARCH[Internet]. 2020;8(1 ):121-135. Available from: https://sid.ir/paper/393002/en

IEEE: Copy

Javad Khanifar, Ataallah Khademalrasoul, and Hadi Amerikhah, “Effects of Digital Elevation Model (DEM) Spatial Resolution on Soil Landscape Analysis (Case study Raakat watershed of Izeh, Khuzestan Province),” APPLIED SOIL RESEARCH, vol. 8, no. 1 , pp. 121–135, 2020, [Online]. Available: https://sid.ir/paper/393002/en

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