Analysis of water balance and hydrodynamics of the Lake Beseka, Ethiopia

Abstract This study aims to calculate the water balance, interaction with irrigation inflow, and hydrodynamics of Lake Beseka by a spreadsheet-based model using climatic, hydrological, multi-temporal satellite images, groundwater, lake chemistry data. The rainfall for catchment was estimated as 558.4 mm/year, whereas mean evaporation computed 2,214 mm/year Penman method. annual direct contribution found be 25.84 MCM (million cubic meters) runoff inflow in area 37.2 MCM. balance pointed 108.2 MCM/year indicating that greater than outflow. A major cause rise level drainage excess toward lake, mainly from Fentale Irrigation Farm. average increment groundwater 12 cm/year 2010 2014. From 1998 2014, electrical conductivity reduced 25.6%, calcium increased 96%. outlined appropriate should implemented ensure between rainfall, infiltration, surface optimize economic social welfare area.