Impact of water hyacinth on rural livelihoods: the case of Lake Tana, Amhara region, Ethiopia

Water hyacinth covers a significant portion of Lake Tana affecting the livelihoods of thousands of rural households. The general objective of the study was to assess the impact of water hyacinth on the livelihoods of rural households living around Lake Tana. Quasi-experimental research design was applied to achieve the specified objectives of the study. Data was collected from 413 survey households, thirteen key informants, six focus group discussions and field observation. Descriptive statistics and propensity score matching (PSM) using STATA 15.0 were used for data analysis. Results of the study revealed that crop, livestock, and fishery production are the most important livelihood strategies of the study area accounting for 99.3, 95.2 and 9% of the sample households, respectively. The average annual crop production of the households was 2629.1 kg of rice equivalent. However, the weed affected the crop production of 34.1% of the sample households through covering the agricultural land and making the land preparation difficult. In addition, the weed affected 36.6% of the households’ livestock production. The impact was revealed in covering the grazing land, causing disease and/or death of the livestock and elevating the livestock production cost. Furthermore, water hyacinth was found as a reason for the reduction of fish population, blockage of fishing entry sites and disruption of the transport system. A statistically significant reduction of fish production, 45.7% in wet season and 49.9% in dry season, was generated because of water hyacinth. The PSM result showed that the water hyacinth significantly decreased the crop production (278.7–475.4kg of rice equivalent) and livestock production (0.083–0.114 TLU) of the affected households. The study recommended management of water hyacinth to control the impacts on rural livelihoods and further studies towards medication of water hyacinth cased livestock diseases and the possible ways of the weeds consumption as a feed.