Thesis Open Access
Jemal Fito (PhD)
Water is a scarce resource but it requires for growth of crops. Sugarcane is used for sugar for human consumption and also important for bio-ethanol production. Water footprint (WF) is an indicator that expresses the amount of freshwater embodied in each ton of crop produce. The main problem facing Ethiopia will be water scarcity if water resource is not managed properly. In line with this, study is focused on the importance of water management for sustainable bioenergy production and the competition for water resource between water for food and water for energy. Therefore, this study aims to assess the green, blue and grey water footprint of sugarcane and bioethanol production in the Fincha and Metehara estate farms. Basically, the value of WF may vary based on type of crop, climate, soil characteristics, and production volumes or consumption methods. All those data are available for this investigation was collected from secondary data. These are climatic data (monthly average minimal and maximum temperature, humidity, wind speed and sunshine length), meteorological data (monthly average rainfall data), CROPWAT 8.0 model, nitrogen fertilizer application rates and sugarcane yield. Differences in WF sugarcane are mainly caused by crop water requirements and yields. Applying Penman-Monteith method for water investigation, the sugarcane water requirements (SWR) of 2021.1mm/growing period in Fincha and 3605.4mm/growing period in Metehara farm were obtained. Similarly, in Fincha estate farms, the sugarcane WF of 188.01 m 3 /t which composed of 67.45m 3 /t green, 113.42m 3 /t blue and 7.14m3 /t grey was recorded whereas the sugarcane WF of 239.11m3 /t which consist of the green 29.42m3 /t, blue 204.13m3 /t and 5.56m3 /t grey in Metehara estate farms was found. Hence, irrigation (blue WF) is the major concerning area to manage the water. The WF values are on the range of global average WF which is between 120 and 410m3 /t this indicates that the WF values are optimum and the result of the study is effective. The WF of bioethanol in Fincha estate farm was 2067.62L/L whereas 1441.54L/L in Metehara farm estate. Therefore, those values of WF of sugarcane indicated that they produce ample zone to improve WF of crops for sugar and bioethanol water use more efficiently and decrease the impact of fossil fuel on climate change.
Water Footprint of sugarcane industry the case of fincha & Metehara sugarcane Estate Farm.pdf