tailieunhanh - Forest land use change in Ngoc Phai commune, Cho Don district, Bac Kan province, Vietnam (1990 2005)

The study was conducted at the Ngoc Phai Commune, Cho Don District, Bac Kan Province, Vietnam. The aimed to determine land-use changes (LUCs) for the last 15 years (1990-2005) of Doi Moi (renovation) ra in the mountainous region of northern Vietnam. | Đàm Việt Bắc và cs Tạp chí KHOA HỌC & CÔNG NGHỆ 77(01): 97 - 102 FOREST LAND-USE CHANGE IN NGOC PHAI COMMUNE, CHO DON DISTRICT, BAC KAN PROVINCE, VIETNAM (1990-2005) Dam Viet Bac, Dam Xuan Van* College of Agriculture and Forestry - Thai Nguyen University SUMMARY The study was conducted at the Ngoc Phai Commune, Cho Don District, Bac Kan Province, Vietnam. The aimed to determine land-use changes (LUCs) for the last 15 years (1990-2005) of Doi Moi (renovation) ra in the mountainous region of northern Vietnam. For spatial data, the Geographic Information System (GIS) was applied as a tool for determining LUCs. Three land-use maps (1990, 1998 and 2005) were overlaid and grouped into two intervals (1990-1998 and 19982005). Several thematic maps were created such as slope, elevation, drainage and road maps. Moreover, the study site was divided into 204-grid cells with 500 m x 500 m/cell or 25 ha/cell to identify and quantity the area and location of the land-use changes associated with the grid cell level. For the period 1990-1998, the total area of forest degradation was ha. This occurred at 15°-35° slope, 500-700 masl and at a distance of 500-1000m from location of LUCs to the main road. Forest restoration for the same time period was ha mainly at 15°-35° slope, 400-700 mal and at a distance of 100-250 m followed by 250-500 m and 500-750 m. For the period 19982005, forest degradation had a total area of ha mainly at 15°-35°slope, 400-600 masl and at a distance of 250-500 m followed by 500-750 m and 750 – 1000 m. Forest restoration for the same time period was ha mainly at 15°-35° slope, 400-700 mal and at a distance of 250-500 m followed by 500-750 m and 750-1000 m. Keywords: Land use change, mountainous region, northern Vietnam INTRODUCTION* Three-quarters of Vietnam‟s total land area of million hectares is occupied by hills and mountains. The remaining one-third is home to the national population which have undergone rapid .

• Sinh học
• Forest land use change in Ngoc Phai commune
• Land use change
• Bac Kan province
• The mountainous region of northern Vietnam