Abstract:
Critical land is defined as a land that has been damaged and is not in accordance
with its allocation, thus losing or diminishing its functionality to specified or expected
limit.
Critical land is a land that has less than 25% of vegetation covering,
topography with a slope of more than 15% and/or characterized by symptoms of
erosion such as sheet erosion (erosilembaran) and gully erosion (erosiparit)
(Ministry of Forestry, 1994). The land used is not in accordance with the land
capability, making it have or be in the process of physical/chemical/biological
damage, which in turn endangers the hydrology function, agricultural production,
resettlement and socio-economic life of people in the watershed.
The purpose of this study is to identify the critical level of land on each land unit and
land covering based on biophysical parameter analysis in Sub-Sub-watershed
Amandit. The benefit attained from this study is expected to find the criticality level of
land based on biophysical characteristics of land in Sub-Sub DAS Amandit South
Kalimantan.
The results of the analysis showed that the widest area with the most critical level of
degradation is actually found in Protected Areas, within over 9,000 hectares. It is
followed by Kentawan Mountain Nature Reserve covering an area of over 200
hectares. Very critical land is only found on Protected Forest, although only covering
127.58 hectares. There is very little non-critical land in Sub-sub-watershed Amandit,
with 20.51 hectares, which is also only in Protected Forest. This non-critical land is a
flat forested area in Protected Forest region. The extent of critical land in the
Protected Forest Region is determined by its steep topography, and most of the area
actually covered by Shrublands. While critical land on Kentawan Mountains Nature
Reserve, in addition to topography, is also determined by the condition of the rocky
land, so that no crops that can grow on it.
