It originates in the mountains of the Serra do Caldeirão [pt] in Loulé and flows through the municipalities São Brás de Alportel, Tavira, Alcoutim and Castro Marim, where it reaches the Guadiana.

Some structures were well-preserved, offering evidence of habitation patterns and resource use closely linked to the river, which likely played a crucial role in sustaining the community.

Richards later explained that the striking colors were a result of processing the original photo using Topaz Adjust 4, with the blue tone reflecting the sky and white flecks caused by clouds.

It establishes zoning regulations that distinguish areas dedicated to nature conservation from those suitable for recreational and leisure activities, promoting a balanced coexistence between environmental protection and economic development.

Additionally, the plan considers the potential impacts of climate change, incorporating measures to enhance the reservoir’s resilience to periods of drought and water scarcity.

Provisions are included to support sustainable tourism initiatives, encouraging low-impact activities such as hiking and birdwatching while prohibiting practices that could threaten the area's biodiversity.