[2] The Aiviekste flows from the northern end of Lake Lubāns, where it does a wide semicircle and then turns southwest.

At this stage is the smallest drop, in addition, here Aiviekste receives the largest tributaries Pededze, Bolupe and Iča.

After the construction of the Pļaviņu hydroelectric power plant, the lower end of Aiviekste is flooded with a reservoir.

[4] Aiviekste is regulated by locks and canals, as its flow capacity is several times too low when the flood season begins in Lake Lubāns.

[5] The Aiviekste floodplain in the middle of the river is a nature reserve as a habitat for birds and a home for rare plants.