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Litani Water Quality Management Project Technical survey report summer conditions

Litani Basin Management Advisory Services (BAMAS)
rapport Aug 2005 ; 91 pages
Ed. DAI - Jddeideh USAID - Antelias
I. Field summer reconnaissance
A. field observations
B. rationale for sample selection
II. Water quality assesment
A. sample collection and analysis
B. results and discussion
1. Surface water
2. Qaraoun lake
3. Canal 900
4. Groundwater
5. Water samples comparative assessment
6. Soil
7. Crop samples
8. Fish
Following the recommendations of the Winter Technical Survey, which was completed in May 2005, as part of Task 2 of the Litani BAMAS Project, a summer environmental sampling and analysis campaign was conducted to assess the pollution situation in the Upper Litani Basin during the dry season. Accordingly, site reconnaissance visits were conducted during June-July 2005 to ascertain observations of the field winter reconnaissance completed during February 2005 and document changes since that time. As discerned in the winter survey, the sources vary between domestic wastewater discharge, industrial effluent, and solid waste landfill/disposal sites. Again, it was observed that wastewater/industrial effluents are still being directly discharged into the Litani river and its tributaries without prior treatment. Yet, during the summer season, the flow of the water in the Litani river was considerably low, due to low water flow from spring sources and direct water pumping via pumps installed at the river bank, water diversion through earthern canals for irrigation, and/or intentional blocking of the natural river flow for water collection purposes. These factors and practices are resulting in a minimum quantity of water reaching the Qaraoun Lake, unlike during the winter season.
The summer sampling program comprised of the collection of water samples from the Litani River and its tributaries, groundwater samples throughout the basin, water samples from Canal 900, water and fish samples from the Qaraoun lake, and soil and crop samples from irrigation areas adjacent to Canal 900. To the extent feasible, samples were collected from the same locations selected during the winter sampling program. The collected samples were analyzed for a pre-defined set of bacteriological, physical, and chemical parameters and the results were compared with international and national standards for different water uses. Table I presents the number of collected samples and the corresponding type of analysis.


Tout public

Mots clefs:

eau de surface: rivière, lac (CI) (DT) (OP) , pollution (CI) (DT) (OP) , qualité des eaux (CI) (DT) (OP)

Pays concerné:

Liban (CI) (DT) (OP)


DAI - Development Alternatives Inc - Jddeideh - Liban

USAID - US Agency for International Development - Antelias - Liban

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