Emnet Negash

Emnet Negash
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Emnet verified their affiliation via an institutional email.
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Emnet verified their affiliation via an institutional email.
Oregon State University | OSU · College of Earth, Ocean and Atmospheric Sciences

PhD

About

59
Publications
137,841
Reads
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358
Citations
Additional affiliations
October 2020 - present
Ghent University
Position
  • Researcher
Education
October 2020 - September 2024
Ghent University
Field of study
  • Geography

Publications

Publications (59)
Article
Full-text available
Land use and the associated ecosystem service functions vary with changes in agroecological conditions. This study analyzed distribution of ecosystem service values along the agroecological gradient in Borena landscape. Land cover information was extracted from Landsat satellite images; and ecosystem service values estimated using established globa...
Article
During the 2021 conflict in Tigray (north Ethiopia) crop cultivation has been hampered by warfare. Oxen have been looted and killed, farm inputs and tools destroyed by Ethiopian and Eritrean soldiers. Farmers felt vulnerable out in the open with their oxen. To produce, farmers evaluated risks involved with ploughing and organised lookouts. Overall,...
Article
Full-text available
In recent years, armed conflicts are globally on the rise, causing drastic human and environmental harm. The Tigray war in Ethiopia is one of the recent violent conflicts that has abruptly reversed decades of ecosystem restoration efforts. This paper analyzes changes in woody vegetation cover during the period of armed conflict (2020–2022) using re...
Article
Full-text available
Topoclimate, orographically enhanced rain on windward slopes and leeward rain shadows, control rainfall variability in tropical mountains. Such variability may cause a substantial societal impact in populated highlands such as in Ethiopia. This study aims at understanding the rainfall diurnal cycle and the orographic driving factors over the Ethiop...
Article
Flood‐based farming is a means of improving crop production in rain‐deficit lowlands. Such spate irrigation systems are growing in importance, although the effects of headwater hydrological deficit on downstream flood farming are lacking evidence. This study investigates the impacts of headwater hydrological deficit on the extent of spate‐irrigated...
Conference Paper
Full-text available
Rainfall distribution over the horn of Africa is notably influenced by the region's complex topography and circulation patterns, presenting significant challenges for water-resource management and agricultural practices. Additionally, reliable and widespread climate observations are lacking in this area. High-resolution climate models, however, may...
Article
Full-text available
In this database, we attempt to document the widespread involvement of Ethiopian public universities in the war in Tigray. In general, Ethiopian universities have provided financial and material support to the Ethiopian army and allied forces, practiced discrimination of their students and staff members of Tigrayan origin, including harassment and...
Chapter
Full-text available
ሓያል ኣምበጣ ግራትካ በሊዑስ ኣብ ደጎልካ ይሰፍር:: --------------- A locust swarm that ravaged your crops camps in your backyard. ------------Abstract: This study investigates the impact of the Tigray war on agricultural activities in the region during the 2021 cropping season. The conflict, beginning in late 2020 amidst a desert locust infestation, resulting in a...
Data
Following two years of combat, blockade, and power outage, the Tigray war in northern Ethiopia has had a substantial negative impact on the environment (2020–2022). This photographic dataset, part of a rare study carried out by the same research team before and after a war, compares 26-year legacy data on land degradation, with post-war observation...
Conference Paper
Full-text available
The Tigray war in northern Ethiopia has had significant environmental effects on the land, after two years of fighting, blockade and power outage (2020-2022). This study contrasts post-war observations at 56 sites in Tigray’s Dogu’a Tembien district with 26-year legacy data on land degradation, a rare study conducted by the same research team befor...
Article
Full-text available
The war in Tigray, Ethiopia has triggered a massive humanitarian crisis, displacing millions. Yet, the impact on cultivated land and local food production remains poorly understood, impeding effective aid. Leveraging Sentinel-2 satellite imagery and a decision tree algorithm with Normalized Difference Vegetation Index (NDVI) time series, we develop...
Preprint
Full-text available
This piece intends to point out some serious factual errors and clarify scientific misconduct found in the article "Gender-based violence in the context of armed conflict in Northern Ethiopia" by Tewabe et al. (2024), published in Conflict and Health. Our critical analysis identified several substantive concerns that undermine the scientific credib...
Article
Full-text available
Small farms contribute to a large share of the productive land in developing countries. In regions such as sub-Saharan Africa, where 80% of farms are small (under 2 ha in size), the task of mapping smallholder cropland is an important part of tracking sustainability measures such as crop productivity. However, the visually diverse and nuanced appea...
Article
Full-text available
Ecosystems provide a wide range of services crucial for human well-being and decision-making processes at various levels. This study analyzed the major land cover types of north-central Ethiopia and their impact on total and per-capita ecosystem service value (ESV). The ESV was estimated using the benefit-transfer method along the established globa...
Conference Paper
Full-text available
Wars have multifaceted effects on small-scale farming systems. Due to the paucity of field data, researchers take remotely sensed data as the best option to monitor and map changes in farming systems in relation to war. However, unless supported by ground data, such an approach hardly considers the diversity in local conditions as experienced by lo...
Conference Paper
Full-text available
In recent years, armed conflicts are globally on the rise, causing drastic human and environmental harm. The Tigray war is one of the recent violent conflicts that has abruptly reversed decades of ecosystem restoration efforts. Although field-based investigation into the level of damage is complicated by access and safety issues, recent advances in...
Conference Paper
While the Ethiopian highlands constitute over 90% of the population and total area suitable for agriculture, livelihood of 66% of the population depends on subsistence rainfed agriculture. Small rainfall variability could therefore cause massive economic loss. This work aims at understanding the sub daily distribution of average and extreme summer...
Preprint
Full-text available
Small farms contribute to a large share of the productive land in developing countries. In regions such as sub-Saharan Africa, where 80% of farms are small (under 2 ha in size), the task of mapping smallholder cropland is an important part of tracking sustainability measures such as crop productivity. However, the visually diverse and nuanced appea...
Article
READ THE ARTICLE AT: https://theconversation.com/ethiopia-how-a-lucky-village-in-tigray-survived-the-devastating-war-205023 _______________________ The war waged by the Ethiopian Federal Government and Eritrea against the Tigray regional government, which lasted from November 2020 to November 2022, caused massive devastation. Multiple war crimes we...
Conference Paper
The Ethiopian highlands are home to more than 90% of the Ethiopian population and constitute for 90% of total area suitable for agriculture (Hurni et al., 2010). The livelihood of 66% of Ethiopia's population depends on subsistence agriculture, mostly rainfed. Little rainfall variability can therefore cause massive economic loss for farmers reliant...
Conference Paper
On November 4th, 2020 a deadly civil war broke out in Tigray, Ethiopia displacing close to 2 million people internally and more than 48,000 refugees in neighboring Sudan by August 2021[1]. Given agriculture is the livelihood of millions of people in Tigray, evaluation of the conflict’s impact on cultivated land and the consequent crop production is...
Article
Full-text available
EDITOR's NOTE: The people of Tigray owe their survival to no-one but themselves. This remarkable report is by a multi-author team from the universities of Mekelle and Ghent. It focuses on the small village of Dabba Selama and tells this story. As Tigray emerges from its imposed isolation and silence, this is one tale among many. In this case it’s a...
Preprint
Full-text available
The war in Tigray, Ethiopia has displaced millions of people and created a humanitarian crisis. However, the impacts of the conflict on cultivated land area and local food production remains poorly quantified, hindering aid efforts. We used Sentinel-2 satellite imagery and developed multiple cultivation detection criteria based on Normalized Differ...
Article
Continued ecosystem damage could eventually make Tigray part of a wider desert connecting the Sahel to the Afar Triangle, a scenario which may render the area uninhabitable. Access full text here: https://www.ethiopia-insight.com/2023/02/22/war-and-siege-inflicted-damage-on-tigrays-ecosystem/
Experiment Findings
Full-text available
Tigray's wartime landscape-a regional geographical study in the Tembien highlands (HANDOUT) Highlights • We made harrowing observations that are consistent with our past findings on failing crop yields, famine, and death toll in the Tigray war. • Many major findings hold true across the ten studied settlements and their surroundings. • In terms of...
Article
--- ETHIOPIA INSIGHT --- The principles of academic freedom have been violated amid the civil war and universities have contributed to wartime abuses in a variety of ways. ----- FULL ARTICLE ---> https://www.ethiopia-insight.com/2022/12/24/ethiopian-universities-have-infringed-on-human-rights-during-the-tigray-war/
Experiment Findings
https://doi.pangaea.de/10.1594/PANGAEA.951344 -------> Since late 2020, one of the worst wars has been raging in Tigray, Ethiopia's northernmost region. A humanitarian tragedy has been caused by the fighting (Dedefo Bedaso 2021; Annys et al. 2021). Intense fighting occurred throughout the whole region, and looting and damage were rampant. Farmers...
Conference Paper
On November 4th, 2020 a deadly civil war broke out in Tigray, Ethiopia characterized by communication blackout leaving the region without access to cell service or internet. Given agriculture is the livelihood of millions of people in Tigray, evaluation of the conflict’s impact on cultivated land and the consequent crop production is critical for g...
Presentation
Full-text available
Hoewel de mensenrechtenschendingen in Qatar nu veel aandacht krijgen, blijven andere humanitaire rampen compleet onder onze radar. Een schrijnend voorbeeld hiervan is Tigray (Ethiopië). Bovenop een gewapend conflict, kreeg de regio de COVID-19-pandemie en een sprinkhanenplaag te verwerken. Professor in de geografie Jan Nyssen en zijn team (UGent)...
Article
Full-text available
Due to war conditions, the local farmers had to largely rely on their own crop production, mainly by subsistence farming, in Tigray, North Ethiopia. We assessed the crop stands in 2021 and evaluated the level of resilience of the indigenous farming system. Quantitative data were collected from 161 farm parcels in various ecoregions of this tropical...
Article
Due to war conditions, the local farmers had to largely rely on their own crop production, mainly by subsistence farming, in Tigray, North Ethiopia. We assessed the crop stands in 2021 and evaluated the level of resilience of the indigenous farming system. Quantitative data were collected from 161 farm parcels in various ecoregions of this tropical...
Presentation
Full-text available
In view of our geographical research expertise in the tropical mountains of Tigray (north Ethiopia) since 1994, our focus was deflected from geomorphology and environmental management to casualty recording and survival strategies, after the Tigray War started in November 2020. We created the "Atlas of the Humanitarian Situation", in which we chroni...
Experiment Findings
Full-text available
262 agricultural plots were sampled in August 2022 by a team of geographers in six Tigray districts with contrasting biophysical characteristics. 15% of the observed agricultural plots were fallowed. Cereals had been planted on three-quarters of all the parcels. 71% of the tef lands were in bad condition, while 76% of the wheat and barley fields we...
Article
Full-text available
Increasing drought patterns with profound effects on livelihoods and food security have been documented in Ethiopia. From previous studies', assessments at various timescales, Ethiopia is regarded as a drought-prone country in East Africa. However, there is no documentation available. This paper investigates the spatiotemporal patterns of drought c...
Article
Military conflicts strongly affect agricultural activities. This has strong implications for people’s livelihoods when agriculture is the backbone of the economy. We assessed the effect of the Tigray conflict on farming activities using freely available remote sensing data. For detecting greenness, a Normalized Difference Vegetation Index (NDVI) wa...
Experiment Findings
There was hunger in Tigray (north Ethiopia) throughout the most of 2021 due to the effects of the Tigray conflict (which began in early November 2020). Armed forces from Ethiopia, Eritrea, and the neighboring Amhara region fought against the forces of Tigray's regional government in the first half of the year; in the second half of the year, warfar...
Article
Full-text available
The consequences of prolonged precipitation-deficient periods are primarily substantial water deficit. The spatial characteristics of drylands and various socioeconomic factors worsen droughts’ impacts and deepen poverty among agrarian communities, with attendant food security (stability dimension) implications. This study utilizes a combination of...
Article
Full-text available
Conversion of native pasturelands to cultivated land led to a decline in soil fertility resulting in low agricultural productivity. This study attempted to investigate the magnitude and rate of pastureland to cultivated land conversion and the associated impact on selected soil properties. The study was conducted in three villages of Ofla district,...
Preprint
Full-text available
At the beginning of November 2020, an armed conflict emerged in Tigray, Ethiopia’s northernmost region. The objective of this ‘Atlas of the Humanitarian Situation’ is to document and map the situation in which approximately 6 million Tigrayans currently find themselves. For this, we contacted key informants in different districts of Tigray to colle...
Conference Paper
Conflict has deep historical roots in the horn of Africa, particularly in Ethiopia. Such conflicts often go hand in hand with humanitarian catastrophes including famine and mass-displacement (Annys et al. 2021). The Tigray region of Ethiopia has experienced such conflict induced catastrophes in the 1984/85 (Deckers et al. 2020), and now again (Nyss...
Conference Paper
Full-text available
At the beginning of November 2020, after months of rising political tensions, an armed conflict emerged between the Government of Ethiopia and the - now ousted - Tigray Regional Government. As the conflict arose in the aftermath of a destructive locust plague and on top of the ongoing covid-19 pandemic, soon the realization came that the conflict w...
Conference Paper
Topoclimate, orographic rains on windward slopes and leeward rain shadow control the rainfall variability in tropical mountains (Van den Hende et al., 2021). Such rainfall variability has a substantial societal impact. For instance, they can cause differences in the wealth of rain-fed agriculture farmers among the windward and leeward sides of the...
Book
Full-text available
At the beginning of November 2020, an armed conflict emerged in Tigray, Ethiopia’s northernmost region, in the aftermath of a destructive locust plague and in the context of the ongoing COVID-19 pandemic. In the conflict, the Ethiopian National Defence Force (ENDF) and its allies – formal and informal military factions of the adjacent Amhara region...
Article
Ethiopia and its northern region of Tigray have been in conflict for about a year now. The political power struggle that had been going on for decades escalated a year ago when Ethiopia’s Prime Minister Abiy Ahmed ordered a military offensive. The conflict is putting hundreds of thousands of people in Tigray at risk of starvation and famine. Tigra...
Conference Paper
Ethiopia is a mountainous country known for its distinct topography ranging from alpine environment to desert-like conditions along the rift valley. Topoclimate, orographic rains on windward slopes and leeward rain shadow control rainfall variability in tropical mountains (Van den Hende et al., 2021). Such variability has a substantial societal imp...
Preprint
Full-text available
Collecting field data on 161 sampling sites in very difficult conditions has allowed us to evaluate the status of cropping in part of the Tigray region of Ethiopia, by the end of August 2021. We have observed that local farming communities are remarkably resilient, also in times of conflict and instability. Relying on indigenous knowledge and local...
Article
READ THE FULL ARTICLE AT : https://theconversation.com/how-ethiopias-conflict-has-affected-farming-in-tigray-166229 ------------------------------------------------------------------ Since fighting broke out in November 2020 between the Tigrayan regional government and the Ethiopian army, the conflict has wreaked havoc on the lives of people livin...
Preprint
Full-text available
The damage to human and material resources of the Tigray universities (Ethiopia) inflicted by nine months of war against Tigray is presented in a qualitative way. We used interview methods, and only triangulated findings are represented. It is a story of large-scale destructions...
Preprint
Full-text available
Since November 2020, a civil war is taking place in Tigray (north Ethiopia), where about 75% of the active population are farmers. Here, we present the state of ploughing in Tigray’s war conditions, early in the 2021 rainy season and discuss contextual factors. Early May 2021, around Mekelle, very few croplands have been ploughed, as compared to th...
Article
Full-text available
This study aims at characterizing agricultural drought in Ethiopia and understanding the effects of drought on crop yield. Monthly, seasonal and annual Normalized Difference Vegetation Index (NDVI) and Vegetation Condition Index (VCI) values were calculated using MODIS (MOD13Q1) from the year 2003 to 2017. The relationships between NDVI, VCI, and c...
Preprint
Full-text available
The consequences of prolonged precipitation-deficient periods are primarily substantial water deficit, with the spatial characteristics of a place being (semi)arid, and various socioeconomic factors worsening its impacts and deepening poverty among agrarian communities.This study utilizes a combination of climate, remote sensing and field survey da...
Preprint
Full-text available
The consequences of prolonged precipitation-deficient periods are primarily substantial water deficit, with the spatial characteristics of drylands and various socioeconomic factors worsening its impacts and deepening poverty among agrarian communities, with attendant food security implications. This study utilizes a combination of climate, remote...
Conference Paper
Agriculture remains the dominant source of food production and the livelihood foundation for majority of the rural poor in the sub-Saharan Africa, including Ethiopia. Access to agricultural-water is, however, a limitation hindering crop productivity and end food insecurity in the drylands. In rain-deficit lowlands such as in the Raya-valley, flood-...
Article
Full-text available
This study analyzes the impact of land use/land cover (LULC) changes on the hydrology of the dry Afromontane forest landscape in northern Ethiopia. Landsat satellite images of thematic mapper (TM) (1986), TM (2001), and Operational Land Imager (OLI) (2018) were employed to assess LULC. All of the images were classified while using the maximum likel...
Article
Full-text available
Integrated watershed management (IWSM) technologies have been implemented around the world, including in the northern highlands of Ethiopia during the last few decades. However, their role in improving soil-health along different geological formations is not well studied. This study was, thus, aimed at quantifying the impact of IWSM on soil-health...
Article
Full-text available
Irrigated agriculture in the rainfall‐deficit semi‐arid lowlands of the Raya valley rely on spate systems to produce food crops. Climate and land‐cover dynamics upstream are, however, threatening runoff response reaching these spate systems. The objective of this study was thus to analyse the hydrological response of dryland catchments to changing...
Conference Paper
Full-text available
Spate-irrigation, a system foreseen as a potential means of improving agricultural production in rainfall deficit lowlands, is profoundly threatened by climate and land-cover change upstream. Yet, the actual implications of these changes on spate has not been well studied. The objective of this study was thus to analyze the hydrological-response of...

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