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Bekaa & South Lebanon Flood Update: Litani River Levels Rising in Mansoura, Qasmieh

Current monitoring shows water levels nearing bank-full at the Qaraoun Dam spillways as of April 4, 2026. This surge follows a period of intense seasonal rainfall that has saturated the Litani River Basin, raising concerns over agricultural runoff and infrastructure stability in already vulnerable districts.
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Table of Contents

At a Glance

The Litani River in the Bekaa Valley and South Lebanon is currently experiencing moderate to severe flooding due to heavy spring rainfall, with several low-lying agricultural zones reporting significant overbanking.

Status & Severity

The Litani River Authority (LRA) reports that water stocks at Qaraoun Lake have exceeded 76 million cubic meters, leading to controlled releases to prevent dam overtopping. Downstream flow is currently aggressive, with crests expected to peak within the next 48 hours in the southern coastal plains.

Affected Communities & Regions

  • Mansoura: Extensive flooding of riverside orchards and local agricultural roads.

  • Qasmieh: High water levels impacting the irrigation canals and citrus groves.

  • Jubb Jannine: Significant saturation of the floodplain affecting local transit routes.

  • Sir el Gharbiyeh: Rising banks threatening low-lying residential perimeters.

  • Tyre District (Coastal Litani): Increased flow velocity causing erosion near the river mouth.

Local Landmarks & Interest

  • Qaraoun Dam: The primary focal point for water level management in the Bekaa region.

  • Khardali Bridge: Monitoring is focused here as a key transit point between Marjayoun and Nabatieh.

  • Qasmieh Bridge: A critical landmark for observing the river’s final discharge into the Mediterranean.

Data Sources & Verification

Information compiled from the Litani River Authority (LRA), local station data in the Bekaa Governorate, and verified on-the-ground visual reports from regional hydrology observers.

Historical Comparison

This event is currently trending higher than the spring saturation levels seen in 2024. While not yet reaching the catastrophic volume of the 2019 “Great Flood,” the rapid rise in the upper basin is a significant outlier for early April. Check our archives for more Lebanon river data.

Regional Context

The current flooding of the Litani River is more than a seasonal weather event; it is a complex intersection of hydrology and human engineering. As the longest river in Lebanon, the Litani’s behavior is heavily dictated by the Qaraoun Dam, which regulates flow for both the Bekaa’s agricultural heartland and hydroelectric power.

Historically, urban expansion and the proliferation of informal settlements in the Bekaa Valley have significantly altered the river’s natural floodplains. When heavy rains arrive, the “human footprint”—including unauthorized diversions, lack of riverbed maintenance, and the constriction of natural channels by residential and industrial growth—exacerbates the water’s rise. This phenomenon is a textbook example of how development choices can amplify natural risks. To understand how these dynamics play out on a global scale, see The River Mixer’s Guide to Human-Driven Flooding: How Engineering and Urban Planning Shape Our Rivers.

In the current April 2026 window, this context is further complicated by recent damage to regional infrastructure. The destruction of key bridges, such as the Al-Dalafa Bridge and branches of the Qasmieh Bridge, has not only hindered local mobility but also altered local flow patterns where debris and collapsed structures act as unintended “choke points,” forcing water into adjacent orchards and towns like Mansoura and Arzi.

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Editor's note

This blog post uses publicly available information from various sources, synthesized with the help of AI, as a starting point for exploring the world of rivers. Our editors review the content for accuracy, though we encourage readers to verify information intended for primary source use. We strive to use public domain, licensed, or AI-generated images; due to the nature of online sharing, individual image sources are generally not credited. Please contact us regarding any copyright concerns.

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