Changes in major climatic elements such as temperature, precipitation and wind distribution have triggered weather-related and geophysical disasters. In recent years, the globe has experienced an increased number of f...Changes in major climatic elements such as temperature, precipitation and wind distribution have triggered weather-related and geophysical disasters. In recent years, the globe has experienced an increased number of floods and landslide events which are said to be the most common among other natural disasters. This study examines the influence of climatic elements on the geo-hydrological disaster which occurred in Hanang district-Tanzania on 3rd December 2023. The study used the primary data collected from 182 respondents. Also, the trend analysis (1981-2023) was conducted using average rainfall from 7 meteorological stations in the study area. Annual and seasonal rainfall as well as a number of rainy days were analyzed. The calculated rainfall data were then used to compute the dimensions of the standardized precipitation anomalies (SPA) which is designated as SPA = (P − P*)/σp. Besides, the temperature was analysed to investigate its trend and trend anomaly. Also, the wind rose statistics for the annual, March to May (MAM) and October to December (OND) for the climatology period of 1991-2020 were analysed so as to examine its contribution to rainfall distribution in Hanang district. The examination of annual rainfall data indicates an upward trend in precipitation levels, accompanied by notable variability in rainfall patterns, including seasonal anomalies and deviations from historical averages. The combination of elevated rainfall, anomalies in rainfall patterns, and potentially unfavourable terrain characteristics may have contributed to devastated geo-hydrological disaster risk. However, future research is recommended that could focus on integrating rainfall and temperature data with comprehensive geo-hydrological susceptibility assessments, considering factors such as terrain stability, land cover and land use practices.展开更多
Adoption rates of soil and water conservation measures remain below the expected levels in Ethiopia despite the considerable investments in reducing land degradation and improving soil fertility.This constitutes one o...Adoption rates of soil and water conservation measures remain below the expected levels in Ethiopia despite the considerable investments in reducing land degradation and improving soil fertility.This constitutes one of the key research agendas in the country.This paper underscores the need for investigating the factors hindering or facilitating the adoption of soil and water conservation measures.The study results presented in this paper are based on cross-section data collected from 408 households in eastern Ethiopia,including field observations of 790 plots selected using a multi-stage sampling procedure.A multivariate probit model was employed to analyse the determinants of adoption of three soil and water conservation measures (stone bund,soil bund,and bench terracing) at the plot level.The study findings reveal that household,socioeconomic,and institution characteristics were the key factors that influenced the adoption of soil bund,stone bund,and bench terracing conservation measures.Furthermore,there was a significant correlation among the three soil and water conservation measures,indicating that the adoption of these measures is interrelated.In particular,the results show that there was a positive correlation between stone bunds and soil bunds.However,the correlations between bench terracing and stone bunds as well as bench terracing and soil bunds were negative (implying substitutability).These results imply that the Government and other relevant organizations that are responsible for reducing land degradation in order to increase agricultural production should support the establishment and strengthening of local institutions to facilitate the adoption of soil and water conservation measures.展开更多
文摘Changes in major climatic elements such as temperature, precipitation and wind distribution have triggered weather-related and geophysical disasters. In recent years, the globe has experienced an increased number of floods and landslide events which are said to be the most common among other natural disasters. This study examines the influence of climatic elements on the geo-hydrological disaster which occurred in Hanang district-Tanzania on 3rd December 2023. The study used the primary data collected from 182 respondents. Also, the trend analysis (1981-2023) was conducted using average rainfall from 7 meteorological stations in the study area. Annual and seasonal rainfall as well as a number of rainy days were analyzed. The calculated rainfall data were then used to compute the dimensions of the standardized precipitation anomalies (SPA) which is designated as SPA = (P − P*)/σp. Besides, the temperature was analysed to investigate its trend and trend anomaly. Also, the wind rose statistics for the annual, March to May (MAM) and October to December (OND) for the climatology period of 1991-2020 were analysed so as to examine its contribution to rainfall distribution in Hanang district. The examination of annual rainfall data indicates an upward trend in precipitation levels, accompanied by notable variability in rainfall patterns, including seasonal anomalies and deviations from historical averages. The combination of elevated rainfall, anomalies in rainfall patterns, and potentially unfavourable terrain characteristics may have contributed to devastated geo-hydrological disaster risk. However, future research is recommended that could focus on integrating rainfall and temperature data with comprehensive geo-hydrological susceptibility assessments, considering factors such as terrain stability, land cover and land use practices.
基金the Africa Economic Research Consortium(AERC),German Academic Exchange Service(DAAD)and Haramaya University for funding the study and production of this paper.
文摘Adoption rates of soil and water conservation measures remain below the expected levels in Ethiopia despite the considerable investments in reducing land degradation and improving soil fertility.This constitutes one of the key research agendas in the country.This paper underscores the need for investigating the factors hindering or facilitating the adoption of soil and water conservation measures.The study results presented in this paper are based on cross-section data collected from 408 households in eastern Ethiopia,including field observations of 790 plots selected using a multi-stage sampling procedure.A multivariate probit model was employed to analyse the determinants of adoption of three soil and water conservation measures (stone bund,soil bund,and bench terracing) at the plot level.The study findings reveal that household,socioeconomic,and institution characteristics were the key factors that influenced the adoption of soil bund,stone bund,and bench terracing conservation measures.Furthermore,there was a significant correlation among the three soil and water conservation measures,indicating that the adoption of these measures is interrelated.In particular,the results show that there was a positive correlation between stone bunds and soil bunds.However,the correlations between bench terracing and stone bunds as well as bench terracing and soil bunds were negative (implying substitutability).These results imply that the Government and other relevant organizations that are responsible for reducing land degradation in order to increase agricultural production should support the establishment and strengthening of local institutions to facilitate the adoption of soil and water conservation measures.
