Whether it is legal or not legal, deforestation is the same thing that will result in the stability of mountain soil when disturbed and becomes prone to landslides. This issue has been going on for a long time.
Flash floods almost always cause large numbers of victims. The damage caused is also massive. The economic loss is huge. Landslides and flash floods are not only floods of water but are followed by mud, rocks, tree trunks, and others. Anything that it passes gets destroyed in an instant from roads to houses and other properties.
Result of Deforestation
If we do not restore natural forests in the mountains, the sad event of landslides will repeat itself. The land is a natural material that is loose or compacted. The land is formed due to weathering rocks that are still attached to the parent rock. The formation of this land will often be found in the peak area to the slopes of the hill or mountain, known as the sloping land.
Thick weathered soils can be stable and survive on sharp slopes because they are held by the roots of forest fibers. While the supporting roots function as armature (nails) to the soil beneath.
The abundance of native forests in the mountains serves as a climate system, water system, and wind system. Rainwater energy that falls into the earth is retained by the forest canopy and falls down through the litter which eventually seeps into the ground. Forests in the mountains are able to absorb annual rainfall into the ground by 80% and a small portion of rainwater is channeled as surface water.
That means more than 80 percent of annual rainfall is absorbed into the soil and discharged proportionally around the mountain like a spring (water source). The spring will supply and increase the flow of river water around the mountain so that it can run water for a year.
Human Exploration of Virgin Lands
With people growing in population year after year, vast land areas had been explored which shouldn’t be inhabited. Trees had been cut down using chainsaws. For better tools that suit your needs. see dws779 vs dws780. Rainforests were transformed into tourist areas filled with hotels, villas, settlements, rice fields, plantations, etc. resulting in unprotected and unstable mountain land.
Mountain land has become increasingly unstable and ready for landslides. Initially, cracks will appear at the top of the ground cracks and slopes and rainwater that falls 80% will flow. Some others will sink in through cracks. The cracks get wider and begin to decrease. The community knows it as a mobile land. The number of cracks will be entered by rainwater so that the sloping land gets heavier and starts to go down, which is indicated by the bottom of the sloping balloon. When it rains continuously, the slope of landslides like liquid. When you enter the river, it will flow as a flash flood that hits and carries whatever it passes.
How to prevent or reduce the risk of flash floods? The only way is to make forested mountains. Reforestation with reforestation is clearly ineffective because it takes a long time to grow. For this reason, together with reforestation, coupled with vegetation engineering, planting trees that are still alive with the rules of about 2/3 into the ground, 1/3 appeared on the surface or placed. The hope, from the embedded stem, fibers grow roots that will bind and strengthen the soil.
The role of government is needed to restore the function of the mountain peak area. Because the region has been massively and systemically structured by many private companies whereas the use of technology should be for the good not only of the people but also of the environment. The government must firmly restore the function of the area as a protected forest area and catchment area.