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