Tagus and Guadiana Rivers in Portugal and Spain
This image spans much of Portugal (left) and western Spain (right). The land appears drier to the south, in both countries, and in the portion of Spain visible in the upper right quadrant.
Due to this dryness, irrigation is important. The reservoir created by the Alqueva Dam, bottom center, along the Guadiana River is used for irrigation and hydroelectric power. Following the river to the north, many areas of green agriculture can be seen near its banks.