Landuse and landcover change assessment in the Upper Runde sub-catchment, Zimbabwe and possible impacts on reservoir sedimentation

Kusena, Winmore; Chemura, Abel; Dube, Timothy; Nicolau, Melanie; Marambanyika, Thomas

doi:10.1016/j.pce.2021.103105

Cited by 4 publications

(2 citation statements)

References 17 publications

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“…Vegetation cover was stable within the National Park but in adjacent lands forest cover actually increased by approximately 7% which the authors attribute to agricultural land being left fallow and regenerating as people left the country in response to the FTLRP. A concern with tree loss is the associated increase in soil erosion and sediment yield, as documented by Kusena et al [36] in the Upper Runde subcatchment.…”

Section: Discussionmentioning

confidence: 97%

Assessing Trends in Tree Cover, Wildfire and Population Growth in Zimbabwe since 2000

Underwood,

Hollander,

Hahn

2024

Land

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Zimbabwe’s woodland and forests have experienced substantial change over the last two decades. In this study, our objective was to assess national-scale spatio-temporal changes in tree loss, wildfire, and population growth since 2000 using global data. Our results showed rates of tree loss were highest in the urbanized Harare and Bulawayo provinces between 2000–2004, followed by Masvingo and Manicaland provinces. We found agricultural versus non-agricultural land type classes had higher tree loss, with the highest rates in small resettlement farms (‘A1’ farms, averaging 5 ha in size) between 2000–2008. The findings from our analysis of wildfire showed burning peaked in 2010, impacting 12% of the country. In the peak fire years of 2008–2012, 30% of A2 self-contained resettlement farms (‘A2’ farms, averaging 318 ha in size) burned, along with 19% of A1 resettlement farms. Analysis of global population data showed increases across all provinces, particularly in large-scale commercial farming areas, with gradual increases seen in A1 and A2 farms. Understanding the trends over two decades and the patterns in three key pressures—tree loss, population change, and fire—provides an important contribution to help guide regional assistance efforts in Zimbabwe.

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Section: Discussionmentioning

confidence: 97%

Assessing Trends in Tree Cover, Wildfire and Population Growth in Zimbabwe since 2000

Underwood,

Hollander,

Hahn

2024

Land

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“…Si bien la capacidad bruta de almacenamiento de los embalses a nivel mundial es actualmente de 6.1×10 12 m 3 , aproximadamente 2×10 12 m 3 (32.8%) de esta capacidad se ha perdido por sedimentación (Ren et al, 2021). Se estima que, anualmente, casi el uno por ciento de la capacidad de almacenamiento de los embalses a nivel mundial se pierde debido a la sedimentación (Ghassemi y White, 2007;Kusena et al, 2022). Sin tener en consideración los nuevos proyectos de grandes presas, Sumi (2018) estimó que la mitad de la capacidad mundial de almacenamiento de los embalses se perdería para el año 2050.…”

Section: Introductionunclassified

Estado trófico y características morfométricas como factores reguladores de las tasas de sedimentación en embalses mediterráneos

2022

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En este trabajo se ha medido la tasa de sedimentación de material particulado, como peso seco (DW) así como de carbono (C), nitrógeno (N) y fósforo (P) en seis embalses mediterráneos de características muy contrastadas. Nuestro principal objetivo ha sido determinar: (1) las relaciones entre: DW, la razón molar (C:N:P) del seston, el fósforo total (PT), la razón entre el área de la cuenca de captación y el área superficial de los embalses (Ac:Ar) y la resuspensión del sedimento (razón dinámica); y (2) la relación entre la fracción de la producción primaria que sedimenta desde la zona trófica (razón de exportación) y el estado trófico. Los resultados muestran relaciones positivas y significativas de DW con Ac:Ar, y relaciones positivas pero no significativas con PT y con la razón dinámica. La estequiometría sestónica mostró grandes diferencias con la relación de Redfield. Finalmente, la razón de exportación y el estado trófico muestra una relación inversa, aunque no significativa, indicando posiblemente que el plancton de los embalses menos eutrofizados es menos eficiente reteniendo nutrientes en la columna de agua.

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Estimation of suspended sediment balance of a small catchment in Southwestern Nigeria

Ogunkoya,

Ogbole

2024

Environ Monit Assess

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Landuse and landcover change assessment in the Upper Runde sub-catchment, Zimbabwe and possible impacts on reservoir sedimentation

Cited by 4 publications

References 17 publications

Assessing Trends in Tree Cover, Wildfire and Population Growth in Zimbabwe since 2000

Assessing Trends in Tree Cover, Wildfire and Population Growth in Zimbabwe since 2000

Estado trófico y características morfométricas como factores reguladores de las tasas de sedimentación en embalses mediterráneos

Estimation of suspended sediment balance of a small catchment in Southwestern Nigeria

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