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Catchment Management and Its Effects on Arable Lands of Zimbabwe: A Look beyond the Fast Track Land Reform Program

Journal of Environmental Protection 2013年第10期4卷 1123-1128页

作者： kosamu nyoni Faculty of Agriculture and Natural Sciences Great Zimbabwe University Masvingo Zimbabwe.

This study was carried out in selected districts of Mashonaland East and Central provinces of Zimbabwe in 2011 to determine the effects of soil erosion on arable lands and how this related to catchment management. Results show that the highest contribution is 53% and is obtained from arable land codes 5 and 7. These fields show signs of excessive sheet and gully erosion. The least contribution is 0.8% and this is on arable land codes 3, 4 and 8. These fields have properly done conservation works existing. 33% of the assessed arable lands have conservation works in place whilst 67% are not protected and as such the fields are eroded. Soil erosion results in the washing away of the precious top soil, responsible for plant growth and infiltration of rain or irrigation water. This reduces the usefulness of such affected arable lands as crops grown on it can’t thrive due to lack of soil fertility. The paper recommends that government policies focus more on promoting sustainable land use through integrated catchment area management. This will go a long way in achieving sustainable development in Zimbabwe.

关键词： Catchment Area Management Integrated Catchment Management Arable Lands Sustainable Land Use Sustainability Terrestrial Carbon Sequestration

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Assessing the Presence or Absence of Climate Change Signatures in the Odzi Sub-Catchment of Zimbabwe

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American Journal of Climate Change 2013年第4期2卷 225-236页

作者： kosamu nyoni Evans Kaseke Munashe Shoko Faculty of Agriculture and Natural Sciences Great Zimbabwe University Masvingo Zimbabwe Shared Watercourses Support Project between Zimbabwe and South Africa Masvingo Zimbabwe

Climate change and potential adverse impacts on water availability for the purposes of sustaining competing demand uses are causes of concern among water resources managers. This study focused on assessing rainfall and runoff data of a micro catchment in Save’s Odzi sub-catchment to determine if any trends existed and how far the results indicated climate change. The study had four rainfall stations (Rusape, Nyanga, Mukandi and Odzi Police Rail) and five runoff stations (E32, E72, E73, E127 and E129). Mann Kendall’s test was applied for determining trends in the two variables. The results obtained do not point to climate change. This study recommended that issues of current land use patterns and water abstractions be thoroughly understood for the area under study. It also recommended that techniques which promote terrestrial carbon sequestration should be introduced in the micro catchment.

关键词： Climate Change Trend Analysis Sustainable Development Human Activities Mann Kendall Terrestrial Carbon Sequestration

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