What is the main setting in the nonfiction book, A Long Walk to Water?

Nya's part of the story is set completely in Southern Sudan in the years 2008 and 2009. The majority of this part of the story is set in Nya's home village, although other scenes take place at the lake camp she and her family travel to during the dry season. Salva's story also begins in Southern Sudan, but then spans several countries during his travels.