In early 1960â€™s, the surface area of Lake Beseka was only 3 km2. In 1976, thernlake area was estimated at 27.5 km2 and now it covers around 41km2 (Tamirurnet al., 2006). The lake gauge height is about 0.71m in 1976 and 5.6 m in 2006rnwhich almost increased by about 5 m in the last 30 years.rnThe rocks are affected by NNE-SSW faults and fissures. The faults within thernarea of investigation have very atypical morphologies. Profiles across fissuresrnconstructed by Trimble GPS and field observation indicate that the fractures dornnot show the morphology of typical faults. The footwall remains flat and thernconcave hanging wall curves up to ward the fault plane.rnGenerally 487 data of edge matching opening direction are taken and weightedrnaccording their horizontal displacement to gave the total opening directionrn113.4o, which is in agreement with the overall E-W direction.rnThe elevation of water level Lake Beseka is lower than the elevation of waterrntable of wells in the Abadir farm as well as the elevation of Awash River. Hence,rnthe flow of groundwater is towards Lake Beseka.rnThe Abadir Farm- a suger cane plantation south of Beseka-is mainly placedrnwithin the lakeâ€™s catchment area, which is affected by ground cracks in rainyrnseasons. The recharge to the groundwater coming from this plantation affectsrnthe lake level to rise. In addition to the flow of ground water, the tectonic hotrnsprings as well as cold springs, which are also the main factors to thernexpansion of the lake, come through these structures in the direction of SSWNNE. The curve of the lake level fluctuation shows an increment with time whilernclimatic data do not show any anomalies. Therefore, climate has not anyrnimpact/influence on the lake level rise.rnThe extension of Lake Beseka results with flooding and salinity of Abadir farmrnland and endangering of the routes (road and railway) from Addis Ababa tornDjibouti. The expansion of Lake Beseka has necessitated the raising of the levelrnof the road and railway line repeatedly.