Monitoring Mangrove Forest Reclamation Using Geospatial Tools in Can Gio Mangrove Biosphere Reserve, Viet Nam

Sarnam Singh, Nguyen Viet Luong, Truong Thi Hoa Binh

Abstract


We have studied the vegetation cover and land use dynamics of mangrove ecosystem in last one decade to monitor the improvement due to reclamation. Three dates SPOT HRV satellite data (1999, 2004 and 2009) were used. Post classification comparison approach was followed. The classification scheme was uniform and the mapping accuracy was over 82.78 to 87.78% for 1999, 2004 and 2009. The total area considered in this study was 74,048.75 ha. During 1999 to 2009, the dense mangrove forest increased by 10,456.13 ha from 1999 to 2004 and 4,150.56 ha from 2004 to 2009. During 1999 to 2004, the area of open mangrove forest decreased by 6,912.57 ha because much of the open mangrove forest got converted to dense forest. However, from 2004 to 2009 the open mangrove forest increased by 1,755.64 ha. From 1999 to 2004 and 2004 to 2009 most of young forest/shrub areas decreased by 6,921.57 ha and 2,620.45 ha respectively, due to protection and reclamation. Over the years, from 1999 to 2009, most of the agricultural land area decreased, and it was maximum in the period from 2004 to 2009. The water body of area changed very little because the shrimp ponds area did not expand. From 1999 to 2004, the barren land area changed a little; however, from 2004 to 2009, the barren land has greatly decreased (1,076.16 ha). The study indicates that monitoring of the mangrove forests resources using satellite data is significant to understand the impact of anthropogenic pressures as well as management action.

Keywords


Satellite Data; SPOT HRV; Mangrove; Pesticide; Herbicides; Shrimp Cultivation; Ecosystem Restoration

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