context: The length of the Dajla River is 5,3 km and its river basin area is more than 1,3,3 sq km. The river originated in the mountains of eastern Turkey and flowed southeast and for some time entered Iraq, forming the easternmost border between Syria and Turkey. Through Iraq, it flows fairly slowly southward in spiraling areas, and its valleys are flat and broad. In southern Iraq, it formed the Shat al-Arab River in conjunction with the Euphrates River, which flowed for more than three kilometers and fell into the Persian Gulf. In ancient times all the famous Mesopotamian civilizations flourished in the basin between the Euphrates and the Dajla. The ruins of the city of Nineveh, in ancient Assyrian civilization, are situated on the banks of the Dajlandi. There are also remains of Seleucia and Teciphone.
question: What is the length of the river Dajla?