Digging of the Ubulla Canal

حفر نهر الأبلة

Basra

Dijlat al-Awra's tidal rain-channel ran a farsakh, its Basra-side basin called al-Ijana; Umar ordered Abu Musa to dig the Basrans a canal — he began at al-Ijana, led it three farsakhs to Basra, making the Ubulla canal four — then the reach toward al-Hayri silted up. Ziyad, on the diwan under Abdallah ibn Amir, urged completing the dig and was stalled till Ibn Amir left for Khurasan; he resumed Abu Musa's channel to Basra with Abd al-Rahman ibn Abi Bakra in charge, who opened the water racing his horse as it nearly outran him. Ibn Amir returned angry — 'you meant to carry off the canal's fame' — and the estrangement held between their houses for life; before the canal, folk drank from Dayr Qawus on the Tigris, a spot the spirits haunted.

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At a glance

Era
The Rashidun Caliphate · The Umayyad Period
Review
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In space

Basra

Map: Natural Earth, public domain · places and route from the graph

Overview

Al-Baladhuri reports that Umar ibn al-Khattab (may God be pleased with him) ordered Abu Musa al-Ash'ari to dig a canal for the people of Basra, and the digging began from a place called al-Ijana. The length of the canal of al-Ubulla reached four farsakhs. 1

The site of the canal

There was a creek of the blind Tigris in which rain water ran, and its water receded at high tide and dried up at low tide, and it was a farsakh long. Its end on the side of Basra was a hollow called al-Ijana. Abu Musa led the canal three farsakhs until it reached Basra. Then the part between Basra and al-Hayri, about a farsakh, was blocked up. 1

Completion and dispute

Ziyad was in the register under Abd Allah ibn Amir, and he advised that the digging be carried out, but was rebuffed. When Ibn Amir went out to Khurasan, Ziyad dug the canal from the point of blockage to Basra, and entrusted the work to Abd al-Rahman ibn Abi Bakra. When the water was let in, he began to race his horse with the water almost outrunning it. Ibn Amir was angry when he came and told Ziyad that he had meant to take the credit for the canal from him. The two drew apart until both died, and the distance between their children grew. 1

Before the canal

Al-Baladhuri says that people used to drink from the monastery of Qawaws on the Tigris, and that spirits used to bury it. 1

Connections

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Had participant
Abu Musa al-Ashari· زياد بن أبي سفيان· Abd al-Rahman ibn Abi Bakra· Abd Allah ibn Amir
Occurred at
Basra

People and things also explored

The Basra Bathhouse Permissions· Digging of the Ma'qil Canal· Mu'awiya's Marsh Grant· Nafi' ibn al-Harith's Walking Grant· Abd al-Rahman ibn Abi Bakra· Basra· Great Mosque of Basra· Qasr Qubadh / the Hajjaj palace at Basra

Sources

  1. Futuh al-Buldan — al-Baladhuri (Mu'assasat al-Ma'arif edition)
Cite this page

islam.museum contributors. “Digging of the Ubulla Canal”. islam.museum, https://islam.museum/en/event/digging-of-nahr-al-ubulla/. CC BY-SA 4.0. Last updated 2026-10-16.

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The Basra Bathhouse Permissions

Muslim ibn Abi Bakra drew a thousand dirhams and much food daily from his bathhouse; sick, he willed it to his brother Abd al-Rahman and told him the yield — who disclosed it and asked the Sultan's leave to build his own, baths being built at Basra only by the governors' permission. Leave followed for Ubaydallah ibn Abi Bakra, al-Hakam ibn Abi al-As, Siyah al-Uswari, al-Husayn ibn Abi al-Hurr al-Anbari, Rayta bint Ziyad, Lababa bint Awfa al-Jarashi for two, and al-Munjab ibn Rashid; Muslim recovered to find his yield ruined and kept saying 'may God cut his mercy'.