Select the first flood or Landslide?

Indonesia awarded by God with the forest area of the mountains which are spread in all corners of the country. So beautiful green carpet is seen. Moreover, if the rainy season, every corner of the empty land around us, grass and shrub is growing so fast. The beautiful panorama is still clearly visible at the time I first small around 1980's.

What beauty is still there until now? If we go to rural areas may still be, but it will be very difficult to meet again in the urban areas. Because the shrub also do not have the right to live there, let alone the forest.

How the fate of our mountains? Some still look natural with a dense tropical forest. But most have very fate of concern. Barren, arid and no sir. While the mountains with dense forests are still many who have experienced landslides. The end result is the same damage to nature.

Perhaps the description above is not an issue that we need to think about because it is hundreds and even thousands of times we hear and natural without any settlement. Whether there is still little awareness of us? If so, I may be the description the following can give a little description of why it can happen, and why floods and landslides continue the seemingly never stopped.

Flood Phenomena

Genesis flood here I only discuss it in the beginning of the headwaters and the river does not discuss about the problems in urban areas that do not lose the complexity.
Hydrological cycle in which the ideal natural conditions, the rain water that fell in the river headwaters
three things happen, namely:

• direct the water flow in the surface soil and into rivers,
• water bottle up by plants ago trickle into some of the land and have some of the flow on the surface and have a vapor return,
• water that seep into ground water.

What if the natural conditions were not ideal, for example, a few plants?

1. Surface flow will be greater, causing soil erosion which will flow along the rivers. So the river became shallow.
2. Water seep into the ground a little more because there is no storm water plants, as the rain and the soil erosion. But the ground water supplies diminish.
3. When rainfall is very high then the flow along the surface sediment will flow downstream to the swift river in spate and the surrounding area. There were floods.

So the outline, one of the causes of the occurrence of flooding in lowland areas of both urban and low is the deforestation in the headwaters area. The cause is poor drainage system, decreasing the infiltration of water due to a settlement and others.

Landslide Phenomena

As I was on the definition of polecat landslides and soil movement in the post earlier, several factors have triggered the occurrence of landslides. When we are talking landslide problem then our attention is on the slope condition. Are slopes causing landslides that bald?

What about the slopes with dense vegetation that? The answer is no landslides have direct contact with the vegetation above, both lush and barren.
The main disturbance is the occurrence of landslide slope stability. Interference can be due to natural and human activities.
Natural causes are:

1. increasing layer thickness due to soil weathering rock layer below the soil due to the volcano activity. Here's the explanation: In the beginning slopes have a thin layer of soil (ideal) so that the slope is stable, although the dense vegetation to grow. Because of the activity in the magma of the earth, the heat generated to spread around and the rock layers of a layer of rock weathering on the outside, and eventually into the ground slopes become unstable due to soil layers thick add more burden on slopes prone to landslides and even surface form of the forest.
2. earthquake
3. river flow which is very swift at the time of rain, causing the river canyon, which is a foot slope tergerus.
4. rain water in the sink in the slope and restrained by a waterproof layer of rock under the soil layer on the slope so that the soil becomes unstable because of water saturated.

While the cause is due to human activities:

1. loading slope for residential development and other buildings
2. cutting foot slope to build houses, roads and other buildings without the cliffs make cultivation post-amputation. For example, the land barrier wall, plaster, etc.
3. wild mining material in the bottom of the river which is a foot slope. Elevation basis with a decrease in river slope then becomes unstable. And landslides.

May still be many other causes that I have not mentioned.

Keeping the mountain or forest?

In addition to natural factors as the causes of floods and landslides that can not be avoided, then there are some dilemmas that occur in an effort to save the hills and forests in the headwaters.
To avoid flooding the condition of water infiltration areas should be as much as possible. With the forest so dense a flood of business is possible. However, on slopes that are not stable, then the existence of the forest with a high level of infiltration is a disaster because it is vulnerable to landslides.
So we need to know the point-prone areas and provide a priority action to save the mountain or forest. Prevent erosion or flooding.
How easy is the most natural condition as the original. But it's not nearly as possible, yet the condition of natural fact we have so sad.
So far all the readers that we can do, what about our actions to reduce the occurrence of factors triggered floods and landslides in our beloved country, the disaster will be reduced so that in the future?