<Li> the Gibil canal ran southwest from the Tigris to a point south of the frontier city of Kesh, past a branch which went north to that city . The Gibil continued on to Apisala where it intersected with the Ninagina Canal which flowed southeast from Zabalam . From Apisala, the Gibil went on to Umma, where it joined the Iturungal Canal . </Li> <Li> The Issinnitum canal left the right bank of the Euphrates above Nippur to run by the city of Isin, and thence to rejoin the Euphrates at Kisurra . </Li> <Li> The Iturungal canal left the Euphrates below Nippur running past Adab, Dabrum, Zabalam, Umma, Nagsu, Bad - tibira and Larsa and between Uruk and Enegi before rejoining the Euphrates . </Li> <Li> The Nanagugal canal departed from the left bank of the Iturungal canal downstream of Bad - tibira . It marked the eastern boundary of Ur and the western boundary of Lagash . </Li>

Mesopotamia was bordered on the south by which body of water