Page 150 - Çevre Şehir ve İklim Dergisi İngilizce - Özel Sayı

Determination of Erosion Statistics by Land Use Type at National Scale With the
Dynamic Erosion Model and Monitoring System (Demms)

scale. Model parameters are calculated by using the Remote Sensing (RS)
and Geographic Information Systems (GIS) technologies as well as the spacial
statistics methodologies. The model was systematically associated with the
following digital databases (raster and vector): Topographical Maps (1:25.000),
Digital Elevation Models (DEM) (1:25.000), the General Directorate for Mapping
(HGM), Soil Maps (1:25.000), Land Use Data (CORINE2018) (1:25.000), Forest
Stand Maps, (1:25.000), the General Directorate of Forestry (OGM), Basin and
River Network Data, (1:25.000), the General Directorate for State Hydraulic
Works (DSİ), River Sedimentation Data, the General Directorate of Electrical
Power Resources Survey and Development Administration (EİE, 2006-2012),
Türkiye’s Water Erosion Map (ÇEMGM) (Erpul et al., 2016), and Automated
Meteorology Survey Station Data, the General Directorate of Meteorology
(MGM), National Water Erosion Atlas (ÇEMGM) (Erpul et al., 2018).
All data sets about climate, soil, topography and land use and land cover
across our country were used to calculate the parameters of the RUSLE model,
and methodologically, the model layers were generated by using larger data
sets in larger basin scales with relevant RS and GIS tools.

2.1. Operational Methods

DEMMS’ general work flow chart in Figure 1, and it is shown in this figure that
DEMMS is calculated according to the Revised Universal Soil Loss Equation
(RUSLE) (Wishcmeier and Smith, 1978; Renard et al. 1997).
A = R x K x C x LS x P (1)
Here:
A = Annual Average Soil Loss (t ha⁻¹ y⁻¹),
R = Rainfall Erosion Factor (MJ mm ha⁻¹ h⁻¹y⁻¹),
K = Soil Erodibility Factor (t ha h ha−1 MJ−1 mm−1), C = Land Cover and
Use Factor,
LS = Slope Length and Steepness Factor,
P = Erosion Control Factor.

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Special Issue / 2024