Journal of Geographical Sciences ›› 2016, Vol. 26 ›› Issue (4): 473-483.doi: 10.1007/s11442-016-1280-5

• Orginal Article • Previous Articles     Next Articles

Spatial assessment of soil wind erosion using WEQ approach in Mongolia

MANDAKH Nyamtseren1(), TSOGTBAATAR Jamsran1, DASH Doljin1, KHUDULMUR Sodov2   

  1. 1. Institute of Geoecology, Mongolian Academy of Sciences, Ulaanbaatar 15170, Mongolia
    2. Environmental Information Center, National Agency for Meteorology and Environmental Monitoring, Ulaanbaatar 15160, Mongolia
  • Received:2015-06-28 Accepted:2015-10-29 Online:2016-04-25 Published:2016-04-25
  • About author:

    Author: Nyamtseren Mandakh, Researcher, specialized in physical geography, GIS and remote sensing. E-mail: maaggi@yahoo.com

  • Supported by:
    Swiss Agency for Development and Cooperation (SDC), No.81013651

Abstract:

Wind erosion is a major contributor to land degradation and desertification. According to the Global Assessment of Human Induced Soil Degradation, the dryland territories of Mongolia are significantly affected by wind erosion. We used the wind erosion equation model in an ArcGIS environment to evaluate wind erosion across Mongolia. The individual factors of the wind erosion equation were parameterized using the following datasets: (a) monthly climatic data from 45 meteorological stations; (b) 16-day composites of MODIS Normalized Difference Vegetation Index data; (c) a SRTM DEM with a 90 m spatial resolution; and (d) the soil map of Mongolia. The results revealed the significant influence of aridity on wind erosion. The desert and semi-desert ecosystems were more vulnerable to wind erosion, hence more affected. The map of wind erosion revealed three major wind erosion regions where the maximum soil loss of 15-27 t/(hm2?a) was observed. In general, the wind erosion potentials for the entire country of Mongolia are 15-27 t/(hm2?a) in the deserts and semi-deserts, 10-15 t/(hm2?a) in the dry steppes and 5-10 t/(hm2?a) in the steppe regions.

Key words: climatic factors, geographic information systems, Normalized Difference Vegetation Index, roughness, soil wind erosion, wind erosion equation