| dc.description.abstract | Critical land in Indonesia is about 36,317,857 ha of which 22,250,160 ha are outside
forest areas. One of the regions with the most extensive critical land in Indonesia is
Southeast Sulawesi Province. Based on the forest statistical data, critical land in
Southeast Sulawesi Province during Five Year Development Plan (1995 -1999) is
2,808,648 ha, including estimated 1,004,327 ha (35.76 %) critical land outside forest
areas.
The objectives of the study are to (1) identify the distribution of critical land in part of
Poleang Langkowala Sub-Watershed Southeast Sulawesi Province, (2) provide data on
critical land to decision makers as a basis to establish critical land rehabilitation
planning, and (3) to provide a methodology to identify critical land effectively and
efficiently.
The methods employed in this research project contain several steps involving Remote
Sensing and Geographic Information System. The steps were determination of critical
land criteria, image analysis, and GIS analysis to identify critical land. Three-category
areas were used to determine critical land: (1) protection forest area, (2) cultivation area
for agriculture effort, and (3) protection area outside forest area. The parameters used to
determine critical land were land cover, slope, erosion, and management. The steps of
image analysis are preparation, field checking, and classification. GIS activities
including a process of spatial data analysis, tabular data, overlay, and smoothing. All of
these spatial data were overlaid to produce polygons that were used to valuate the level
of critical land. The procedures for spatial analysis consist of establishment the
objectives and criteria for the analysis, preparation of the data for spatial operations,
spatial operations (union, dissolve, reclassify), and evaluation and interpretation of the
results. | |
