The Wadi Bana is a major wadi

Wadi

Wadi is the Arabic term traditionally referring to a valley. In some cases, it may refer to a dry riverbed that contains water only during times of heavy rain or simply an intermittent stream.-Variant names:...

 of southwestern Yemen

Yemen

The Republic of Yemen , commonly known as Yemen , is a country located in the Middle East, occupying the southwestern to southern end of the Arabian Peninsula. It is bordered by Saudi Arabia to the north, the Red Sea to the west, and Oman to the east....

. It flows from the mountains through the Abyan Governorate and eventually enters the Gulf of Aden

Gulf of Aden

The Gulf of Aden is located in the Arabian Sea between Yemen, on the south coast of the Arabian Peninsula, and Somalia in the Horn of Africa. In the northwest, it connects with the Red Sea through the Bab-el-Mandeb strait, which is about 20 miles wide....

 in between the towns of Al Kawd

Al Kawd

Al Kawd is a town in south-western Yemen, near Zinjibar. It is located in the Abyan Governorate and lies on the Gulf of Aden, approximately 40 kilometres by road east of Aden...

 (to the west) and the regional capital of Zinjibar

Zinjibar

Zinjibar is a port and coastal town in south-central Yemen, the capital of Zinjibar District and the Abyan Governorate. It is located next to the Wadi Bana in the Abyan Delta. From 1962 to 1967, it was the administrative capital of the Fadhli Sultanate, although the royal residence remained at...

(to the east). The wadi reportedly receives the most rainfall in the entire country, which accounts for the agricultural lands which have grown up near its mouth in an otherwise barren country. Its mouth is located at 13°03′52"N 45°23′10"E.