Site | Length and width | Anomaly dimension | Presumed source | Permanent anomaly or temporary |
Tripoli and Kalamoun | Medium | Anomaly dimension in 2015 was bigger than 2014 | Solid wastes dumped on the coast and Kalamoun electircal station [17] | Permanent (occurred most of the months) |
Chekka | Small | Anomaly dimension smaller in 2014 than in 2015 | Seeps of surrounding sewages and chemicals from the cement factory and oils from ships | Permanent |
Nahr el Jaouz | Small | Anomaly dimension during 2015 bigger than in 2014 | Outfalls from different sources along the stream course | Temporary (occurred in few months) |
Batroun and Amchit | Regular | Anomaly dimension during 2014 bigger than in 2014 | Seeps of surrounding sewages | Temporary |
Jbeil | Regular | Anomaly dimension similar during both years | Seeps of surrounding sewages | Permanent |
Nahr Ibrahim | Medium | Anomaly dimension bigger in 2015 than in 2014 (high turbidity due to excessive rain in 2015) | Turbidity and sediments | Temporary |
Jounieh | Regular | Anomaly dimension similar during both years | Seeps of surrounding sewages and submarine ground water discharge [18] | Permanent |
Nahr el Kaleb | Regular | Anomaly dimension bigger during wet season than the dry season (dry river during dry season and intensive flow during wet season) | Outfalls from different sources along the stream course | Temporary |
Nahr Beirut | Large | Anomaly dimension bigger during dry season than the wet season (large amount of wastes dumped into the river in dry season) | Outfalls from different sources along the stream course Borj hammoud landfill [9] | Permanent |
Ouzai | Medium | Anomaly dimension was the biggest in June 2015 | Solid wastes dumped on the coast and sewage outfalls | Temporary |
Nahr el Damour | Regular | Anomaly dimension bigger in 2014 than 2015 | Outfalls from different sources along the stream course | Temporary |
Nahr el Awali and Jieh | Regular | 1. Anomaly dimension bigger during wet season (awali river) 2. Anomaly dimension was similar during both years (Jieh) | Nahr el Awali: Different sediments and rock debris Jieh: Warm water from electric station | Temporary |
Nahr el Zahrani | Regular | Anomaly dimension bigger during wet season than dry season | Outfalls from different sources along the stream course and Zahrani station | Temporary |
Nahr el Litani | Small | Anomaly dimension was similar during wet and dry season. And anomaly dimension was bigger during 2015 than in 2014 | Outfalls from different sources along the stream course and sediments debris fron Litani river | Temporary |
Shabriha | Small | Anomaly during 4 months of 2014 | Agricultural practices | Temporary |