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Characteristics of Nonpoint Source Pollution Loads in the Hotspots of Land Cover Change

  • Journal of the Korean Cartographic Association
  • Abbr : JKCA
  • 2014, 14(1), pp.77-91
  • Publisher : The Korean Cartographic Association
  • Research Area : Social Science > Geography > Geography in general > Cartography

김대선 1,  Seung-Rok Lee 2,  CHO, JAEIL ORD ID 3,  Lee Ho-Sang 3,  Yang-Won LEE ORD ID 1

1부경대학교
2(주)지오시스템리서치
3국토연구원

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ABSTRACT

Nonpoint source pollution does not have a fixed point of pollution source, but the land cover itself can be a source of pollution. Amid land cover changes in South Korea for various reasons, satellite remote sensing can be an alternative to capturing such changes in continuous spatial and temporal dimensions. In this paper, we extracted hotspots of recent changes of land cover in South Korea by applying spatial statistical methods to satellite-based NDVI (Normalized Difference Vegetation Index) data and analyzed in-situ observations of pollution loads in the watershed of the hotspots. We found that the pollution loads were substantially increased around the mouth of rivers - the outlets of nonpoint source pollution. It seemed that increase of agricultural lands also affected nonpoint source pollution in some hotspot areas. Detecting hotspots of land cover change can help effective monitoring of the country and the analyses of nonpoint source pollution in the hotspot areas can be utilized as a reference data for preservation and development of the country.

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