Many important upstream areas that nurtured the Northeast part on middle and central water source of water, such as the water filled up at all is it? PA SAK costs so it is important to many ecological systems.
Significant areas upstream line that feeds the Northeast, upper middle and upper central region, such as the time it reaches the Nam Pasak river, so it is very important to the ecosystem.
Watershed area, several important late on the northeast the upper middle and central, such as upstream, upstream at riverhead inflated. The watershed forest a, it is vital to the ecosystem.