Study of the hydrology of Abou Ali river

Abstract

Rivers are widely regarded as one of Lebanon's most important water resources, as well as one of the country's most well-known historical sites and distinctive landscapes. They have large networks since there are 14 rivers in a 10,452 km2 region. The Abou Ali River watershed, which has a basin area of 484 km2 and is 97 percent mountainous, is home to around 600,000 people. The average annual discharge rate is 262 million m3. The river runs for 44.5 kilometers, and its basin has almost 236 cities and villages distributed throughout numerous administrative districts. Tripoli, Lebanon's second largest city, with a population of over 350,000 people and is the dominant urban complex of the basin. In this research, IDF curves must be created, and data was gathered on a daily basis over a ten-year period. Precipitation, temperature, humidity, and wind speed are the most important elements collected from Rafic hariri international airport. The data was directly exported from the weather station's server as.txt files. The maximum monthly rainfall depth was then determined using Excel for categorization for the following 14 durations: 5 min, 10 min, 15 min, 20 min, 30 min, 45 min, 1-hr, 2-hr, 3-hr, 4-hr, 6-hr, 8-hr, 12-hr, and 24-hr. For each duration, the log Gumbel approach will be used in this investigation. Expected return periods are 5, 10, 25, 50, and 100 years. The rainfall intensity is computed and shown for each period and return time. Therefore, 14 distinct forecasts are generated for each period. IDF curves are now created, and the highest rainfall discharge is calculated to be 101.71 m3/s in 100 years. Structures and impediments should also be evaluated since they are a source of variation in the water surface profile.