Groundwater levels are declining at unsustainable levels in many areas of the world. To secure this resource for future generation, well documented groundwater level observations are needed to derive recharge rates and sustainable withdrawal amounts. Understanding the groundwater Evaporation, amount of recharge and withdrawals is important for sustainable water use and effective management of groundwater resources. Although groundwater is routinely monitored in most of the world, relatively little information is available in Ethiopian highlands where groundwater irrigation could greatly increase food security. groundwater levels were measured in 39 shallow depth wells over a 1-year dry period in 2017. at the beginning of the dry phase in October, the average shallow groundwater table was at 3.35m depth and at the end of the dry phase in June, the average shallow groundwater table was at 4.8m depth. The amount of water removed to lost during the dry phase 703 mm. This is replenished through recharge during the wet phase. Rain in excess of the recharge and evaporation is stored on the surface or converted to overland flow. The groundwater flowed slowly towards the lake, but water passing the lakeshore was not a significant term in the water balance of the plain. The amount of water contributed to lake Tana during the dry season is 14780 m3/ year and the plain receives yearly rainfall of 1396 mm.