Floods occur in areas near the riverside where farmers, wanting to make good use of the land, start sowing in the lowlands. When a heavy rain occurs, it causes an overflow in the rivers and devastates the crops.

Some of the problems that arise whenever there is a flood, are the following:

• Heavy precipitation causes an "increase" in the river water level, ttis is more evident when there is an El Niño event.

• Flood-plain inundation and damage to the houses, transportation, farm production, and in some cases with loss ofhuman lives.

• Slow drainage of inundated areas which results in pools of stagnant water, ttis situation generates health problems for the population.

• Flow attacks to the banks of the main riverbed, causing permanent changes in the river course and loss of productive areas.

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