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The term “tajados” comes from the word “tajar” or “detain”. The “tajados” are small ponds dug into the ground to store rainwater and other sources. They have low construction costs and are appropriate for arid areas with rainfall concentrated in a few months of the year. Traditional technology is applied, which due to its size is suitable for family or multi-family units. As it is a water harvesting technique, the waterproofing of the reservoir is essential. The reservoir is a pond dug into the ground, either by hand or with the use of machinery, which makes it possible to store water, and it is also used as a watering trough for livestock. It can be an alternative to large dams due to its low cost and easy construction. The reservoir can have different shapes, the most common being the inverted truncated pyramid. The water sources can be diverse, from a diversion channel, a ravine, roadside ditches, etc.