Spatial Analysis of Land Cover Changes in Eastern Tigray (Ethiopia) from 1965 to 2007: Are There Signs of a Forest Transition?

Kassa, Belay; Rompaey, Anton Van; Poesen, Jean; Bruyssel, Simon Van; Deckers, Jozef; Amare, Kassa

doi:10.1002/ldr.2275

Cited by 106 publications

(84 citation statements)

References 43 publications

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“…However, it is also known for its more recent experiences with soil and water conservation (SWC) activities (Alemayouh et al, 2009;Nyssen et al, 2010). Physical SWC structures (Alemayouh et al, 2009;Negusse et al, 2013) and biological SWC measures through plantation and enclosures (Descheemaeker et al, 2006(Descheemaeker et al, , 2008Belay et al, 2015) have been practised in the semi-arid parts of the basin. These interventions have been implemented at watershed level for the last three decades.…”

Section: Study Area Descriptionsmentioning

confidence: 99%

“…Human interventions expressed in terms of water abstraction, implementation of large-scale soil and water conservation, deforestation, and afforestation in the upstream catchments are the more likely driving forces of changes in the flow regimes, rather than climatic conditions. For example, Nyssen et al (2005) and Belay et al (2015 reported that a strong decrease of forest and bushland has occurred in favour of cultivable and grazing lands from the 1960s to early 1990s. However, the rate of deforestation and land degradation in most parts of the basin has slowed down and even started to recover by increasing the coverage of vegetation from the late 1990s onwards (Nyssen et al, 2010).…”

Section: Drivers For Streamflow Variabilitiesmentioning

confidence: 99%

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Temporal and spatial changes of rainfall and streamflow in the Upper Tekezē–Atbara river basin, Ethiopia

Gebremicael

Mohamed

Zaag

et al. 2017

Hydrol. Earth Syst. Sci.

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Abstract. The Upper Tekezē-Atbara river sub-basin, part of the Nile Basin, is characterized by high temporal and spatial variability of rainfall and streamflow. In spite of its importance for sustainable water use and food security, the changing patterns of streamflow and its association with climate change is not well understood. This study aims to improve the understanding of the linkages between rainfall and streamflow trends and identify possible drivers of streamflow variabilities in the basin. Trend analyses and changepoint detections of rainfall and streamflow were analysed using Mann-Kendall and Pettitt tests, respectively, using data records for 21 rainfall and 9 streamflow stations. The nature of changes and linkages between rainfall and streamflow were carefully examined for monthly, seasonal and annual flows, as well as indicators of hydrologic alteration (IHA).The trend and change-point analyses found that 19 of the tested 21 rainfall stations did not show statistically significant changes. In contrast, trend analyses on the streamflow showed both significant increasing and decreasing patterns. A decreasing trend in the dry season (October to February), short season (March to May), main rainy season (June to September) and annual totals is dominant in six out of the nine stations. Only one out of nine gauging stations experienced significant increasing flow in the dry and short rainy seasons, attributed to the construction of Tekezē hydropower dam upstream this station in 2009. Overall, streamflow trends and change-point timings were found to be inconsistent among the stations. Changes in streamflow without significant change in rainfall suggests factors other than rainfall drive the change. Most likely the observed changes in streamflow regimes could be due to changes in catchment characteristics of the basin. Further studies are needed to verify and quantify the hydrological changes shown in statistical tests by identifying the physical mechanisms behind those changes. The findings from this study are useful as a prerequisite for studying the effects of catchment management dynamics on the hydrological variabilities in the basin.

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Section: Study Area Descriptionsmentioning

confidence: 99%

Section: Drivers For Streamflow Variabilitiesmentioning

confidence: 99%

Temporal and spatial changes of rainfall and streamflow in the Upper Tekezē–Atbara river basin, Ethiopia

Gebremicael

Mohamed

Zaag

et al. 2017

Hydrol. Earth Syst. Sci.

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“…Several studies have analyzed land use change in the Tigray region (Meire et al 2012;Kassa 2013). Belay et al 2014 analyzed land use and land cover changes in Tigray from 1965 to 1994 and 2007. One of their findings is that between 2001 and 2009, areas of central and eastern Tigray, which saw significant investments in land and water management, were greener than what could be expected on the basis of rainfall.…”

Section: Outcomes and Impactsmentioning

confidence: 99%

Integrated Landscape Approaches for Africa’s Drylands

Gray¹,

Henninger²,

Reij³

et al. 2016

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The text of this conference edition is a work in progress for the forthcoming book, Integrated Landscape Approaches for Africa's Drylands (doi: 10.1596/978-1-4648-0826-5). A PDF of the final book, once published, will be available at https://openknowledge.worldbank.org/ and print copies can be ordered at www.amazon.com. Please use the final version of the book for citation, reproduction and adaptation purposes. This work is a product of the staff of The World Bank with external contributions. The findings, interpretations, and conclusions expressed in this work do not necessarily reflect the views of The World Bank, its Board of Executive Directors, or the governments they represent. The World Bank does not guarantee the accuracy of the data included in this work. The boundaries, colors, denominations, and other information shown on any map in this work do not imply any judgment on the part of The World Bank concerning the legal status of any territory or the endorsement or acceptance of such boundaries.Nothing herein shall constitute or be considered to be a limitation upon or waiver of the privileges and immunities of The World Bank, all of which are specifically reserved. Rights and PermissionsThis work is available under the Creative Commons Attribution 3.0 IGO license (CC BY 3.0 IGO) http:// creativecommons.org/licenses/by/3.0/igo. Under the Creative Commons Attribution license, you are free to copy, distribute, transmit, and adapt this work, including for commercial purposes, under the following conditions: Third-party content-The World Bank does not necessarily own each component of the content contained within the work. The World Bank therefore does not warrant that the use of any thirdparty-owned individual component or part contained in the work will not infringe on the rights of those third parties. The risk of claims resulting from such infringement rests solely with you. If you wish to re-use a component of the work, it is your responsibility to determine whether permission is needed for that re-use and to obtain permission from the copyright owner. Examples of components can include, but are not limited to, tables, figures, or images. Attribution-PleaseAll queries on rights and licenses should be addressed to the Publishing and Knowledge Division, The World Bank, 1818 H Street NW, Washington, DC 20433, USA; fax: 202-522-2625; e-mail: pubrights@worldbank.org. Drylands-defined here to include arid, semi-arid, and dry sub-humid zonesare at the core of Africa's development challenge. Drylands make up 43 percent of the region's land surface, account for 75 percent of the area used for agriculture, and are home to 50 percent of the population, including a disproportionate share of the poor. Due to complex factors, the economic, social, political, and environmental vulnerability in Africa's drylands is high and rising, jeopardizing the long-term livelihood prospects for hundreds of millions of people. Climate change, which is expected to increase the frequency and severity of extreme weather events, will ...

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“…The change of land use and cover in a certain range is the result of changes of various types of land use and cover types, and land use and cover as well as its variation and change rate can quantificationally reveal the overall level and change trend of land use and cover in the range (Yu et al, 2014;Belay et al, 2015). Variation and change rate of land use and cover can be expressed as…”

Section: Analysis Of Change Degree Of Land Use and Covermentioning

confidence: 99%

Land use and land cover change based on historical space–time model

Sun¹,

Zhang²,

Liu³

et al. 2016

Solid Earth

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Abstract. Land use and cover change is a leading edge topic in the current research field of global environmental changes and case study of typical areas is an important approach understanding global environmental changes. Taking the Qiantang River (Zhejiang, China) as an example, this study explores automatic classification of land use using remote sensing technology and analyzes historical space-time change by remote sensing monitoring. This study combines spectral angle mapping (SAM) with multi-source information and creates a convenient and efficient high-precision land use computer automatic classification method which meets the application requirements and is suitable for complex landform of the studied area. This work analyzes the histological space-time characteristics of land use and cover change in the Qiantang River basin in 2001, 2007 and 2014, in order to (i) verify the feasibility of studying land use change with remote sensing technology, (ii) accurately understand the change of land use and cover as well as historical space-time evolution trend, (iii) provide a realistic basis for the sustainable development of the Qiantang River basin and (iv) provide a strong information support and new research method for optimizing the Qiantang River land use structure and achieving optimal allocation of land resources and scientific management.

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Spatial Analysis of Land Cover Changes in Eastern Tigray (Ethiopia) from 1965 to 2007: Are There Signs of a Forest Transition?

Cited by 106 publications

References 43 publications

Temporal and spatial changes of rainfall and streamflow in the Upper Tekezē–Atbara river basin, Ethiopia

Temporal and spatial changes of rainfall and streamflow in the Upper Tekezē–Atbara river basin, Ethiopia

Integrated Landscape Approaches for Africa’s Drylands

Land use and land cover change based on historical space–time model

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