Why the frequent floods, and how to prevent them
Why does it flood so easily these days? Several factors combine to make it possible.
First is climate change. The earth’s temperature is rising because the heat emitted by the sun is trapped by greenhouse gases (carbon dioxide and other gases) in the atmosphere. The higher temperature is melting the polar ice caps, causing more water to evaporate. The atmosphere becomes soaked with moisture. More moisture in the clouds equals heavier rains.
With the ice caps melting, more water is poured into the oceans, thus raising their levels. The seas invade low-lying areas. If the melting of the ice does not stop, low-lying islands will disappear; the bigger ones will have their areas reduced as the seas invade their shores.
The second factor is logging, at least in the Philippines. Greedy loggers have ravaged our forests and most of our mountains are now bald. Without trees, there are no roots to hold the soil together. Thus, rainwater easily erodes the mountainsides, carrying the topsoil down to the streams and rivers below.