Application geographic information system (GIS) and remote sensing to assess landcover transition in dioxin impacted area (Ta Bhinh, Cha Val and La De, Nam Giang district, Quang Nam province) for biodiversity convervation

  • Lê Xuân Cảnh
  • Đỗ Hữu Thư
  • Đặng Huy Phương
  • Hà Quý Quỳnh

Abstract

Land cover plays  an importance  role  for creating the habitats  and  biodiversity conservation. This article show result of using GIS and remote sensing to assess  land cover transition in Ta Bhinh, Cha Val, and La De commune, Nam Giang  District, Quang Nam province. The input data included: Remote sensing data, field data collection and topographic map.

The land cover in area included:  1) Tropical evergreen forest below 800  m; 2).  Sub-tropical evergreen forest above 800 m: 3).  Degraded Sub-tropical evergreen  forest above 800 m; 4) Degraded tropical evergreen forest below 800 m; 4 Settlement and 5) water body.

The  biodiversity  decrease  from  type  1,2  to  type  3,4.  The  composition  of  the  humus decrease from 4% in type 1 to 2% in type 4. The humidity balance is decreased from type 1 to type 4.

The fauna in the area is decreased in species composition, number of individual, density, biomass from type 1 to type 4. The vegetation change from topical  evergreen in type 1,2 to degrade evergreen forest in type 3, and to scrub, grassland or bare land in type 4.

The land cover in the area transits in both of structure and square area. The type 2 and type 5 had widest radian during 1975-2008. The grasslandand scrub created by the dioxin impacted during American war had especially generating whichunlike the blank area.

The result of using Remote sensing and GIS technology for study land cover transition is objective,  clearly  displayed.  This  result  will  benefit  not  only  land  cover change, but also the suite of associated endemic species in the enclosedhabitat.

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Published
2014-11-12
Section
Articles