Hanna Karg

Hanna Karg
University of Hohenheim

PhD
Research fellow at the Department of Sustainable Use of Natural Resources (Universität Hohenheim)

About

35
Publications
18,921
Reads
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267
Citations
Citations since 2016
21 Research Items
250 Citations
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Introduction
My research interests include the assessment of rural-urban food systems across scales and under land use change. I use an interdisciplinary set of methods with a focus on spatial analysis including GIS and remote sensing.

Publications

Publications (35)
Article
Full-text available
Markets are critical in connecting small towns with agricultural activities in their rural hinterland. This paper presents data from north-eastern Ghana on grain marketing and trade flows, combined with data on expansion of built and transport infrastructure in five linked towns of a periodic market system. Rurally sourced goods flow through histor...
Book
Full-text available
This Atlas summarizes recent advances in interdisciplinary approaches and research to address the different components of West African urban food systems, including urban and peri-urban agriculture. It thereby draws on the results of several major collaborative research projects and stakeholder consultations conducted in West Africa over the past t...
Article
Full-text available
Periurban areas of growing cities in developing countries have been conceptualised as highly dynamic landscapes characterised by a mixture of socioeconomic structures, land uses and functions. While the body of conceptual literature on periurban areas has significantly increased over the past two decades, methods for operationalising these multi-di...
Article
Full-text available
The rapid expansion of cities in West Africa has implications for urban cropland. This study aimed to assess the dynamics of cropland in West African cities over time and space, to identify key drivers, and to report the effects of changing cropland on farmers and farmers’ resilience strategies. Cities studied were Accra (Ghana), Bamako (Mali), Oua...
Article
Full-text available
In West Africa, rampant urbanization is changing food systems, including the magnitude and composition of food flows and the length of supply chains. An increasing body of literature discusses pathways to sustainable transformation of urban food systems taking into account links between urban and rural spaces. Research and policy have focused on th...
Chapter
In the contemporary world, modernist Western thought supports stereotypical perceptions of cities (innovative, dynamic, progressive) as fundamentally different from the countryside (traditional, static, conservative). This leads to the effect of making near-residential agriculture obsolete; made redundant by transport technologies and an agricultur...
Article
Full-text available
Mali is a major livestock producing country in West Africa. However, in recent years, the sector has faced multiple challenges like farmer-herder conflicts, overuse of grazing and water resources, and the effects of climate change. Meanwhile, traditional livestock systems are becoming less important given the increased availability of vehicular tra...
Article
Continuous population growth and rapid urbanization rates in West and Central Africa are associated with rising demand for fresh vegetables and animal-based products, providing market opportunities for local producers from the surrounding areas. However, in regions such as northwestern Cameroon where pastoral cattle breeding remains an important pa...
Research
West African countries depend on food imported from the global market and on intra-regional trade to supplement national food supplies such as food produced within city regions. However, barriers on the road and at borders make cross-border trade challenging and expensive. Find out more about cross-border trade in West Africa, the formal and inform...
Article
Full-text available
Recent studies have examined the urban metabolism of cities using urban consumption as a proxy for food inflows but very few studies have aimed at quantifying the role of cities as trade hubs and nutrient sinks of their hinterlands. We therefore examined the linkages between food and animal feed supply, their places of production and nutrient flows...
Article
Rapid urban growth in sub-Saharan Africa challenges food supply of cities. As food and other organic matter are transported from production areas to consumption points, water, which has been used for their production, is transported virtually. This study aimed at determining the magnitude and sources of virtual water flows in food trade of two West...
Chapter
Full-text available
By 2050, when the world population is expected to have increased to 9.6 billion, approximately 66 per cent of us will be living in urban areas. Urbanisation is placing significant pressure on resource management, given that cities are hungry and thirsty and enormous hubs of consumption of all kind of goods to which food, water and energy are centra...
Technical Report
Full-text available
Increasingly people live in cities. Currently more than half of the population lives in urban areas, and it is predicted that by 2050, this will be over 75%. This urbanisation is a major driver of unsustainable transformation of urban rural relations and food systems. Urban and peri-urban agriculture (UPA) links and interlinks a wide variety of urb...
Article
Full-text available
Food and nutrition insecurity remains a challenge in sub-Saharan Africa. Several studies have examined food and nutrition insecurity in urban or rural areas but have not captured the whole continuum. Between November and December 2013, 240 households were surveyed along the urban–rural continuum in Northern Ghana. The study objective was to underst...
Poster
Full-text available
This study makes a case for taking a spatial perspective on urban food supply in the West African context. Results showed a clear association between type of commodity and spatial scale of provision, and many factors explaining these patterns come into effect at a specific spatial scale. The extent to which production and market factors influence u...
Poster
Full-text available
Within the larger assessment of urban food supply and commodity specific foodsheds, the question was posed how City Region Food Systems (CRFS) respond to natural disasters like droughts or flooding which might severely affect urban food supply and resilience. The study focused on four cities, Accra, Kumasi, Tamale (all Ghana) and Ouagadougou (Burki...
Article
Full-text available
In response to changing urban food systems, short supply chains have been advocated to meet urban food needs while building more sustainable urban food systems. Despite an increasing interest in urban food supply and the flows of food from production to consumption, there is a lack of empirical studies and methodologies which systematically analyse...
Technical Report
Full-text available
Urban and peri-urban agriculture (UPA) is an integral part of West African life. Descriptive, qualitative research has proliferated, but there have been few randomly sampled surveys of West African UPA. The GlobE - UrbanFoodPlus (UFP) project undertook such a survey in 2013 in Tamale (Ghana) and Ouagadougou (Burkina Faso). The aim was to provide a...
Poster
Full-text available
In recent years, urban and peri-urban agriculture have gained increasing attention worldwide. Urban farming contributes to food security and income generation for urban dwellers and to greener cities. On the other hand, urban agriculture faces challenges, such as polluted irrigation water and land insecurity, particularly in developing countries. I...
Poster
Full-text available
Given the ongoing urbanisation processes in West Africa and the emerging importance of food and nutrition security in rapidly growing cities, this study investigates charac- teristics of peri-urban neighbourhoods and food access in Tamale, northern Ghana. The study uses a comparative approach by looking at urban (n=1), peri-urban (n=3) and rural (n...
Article
Full-text available
This empirical study examines food sources and their quantitative contribution to the city of Tamale, Ghana. The results contribute to an understanding of the urban food system, and evoke questions relating to the standardised measurement and evaluation of urban food system resilience across geographical contexts.
Conference Paper
Full-text available
Urban backyard gardening in developing countries is commonly characterised as mainly subsistence-oriented 'niche farming', whereas open space farming tends to be perceived as market-focused (Drechsel et al. 2006; Moustier & Danso 2006). However, few studies have systematically analysed the role of backyard gardening in urban and peri-urban food sup...
Chapter
This chapter presents approaches tested in Ghana to mitigate wastewater irrigation-related risks for consumers and farmers from microbial contamination. The recommended interventions follow the WHO approach concerning multiple barriers along the food chain. Factors that could support the uptake of safety measures are discussed.
Article
The increased emphasis on non- or post-treatment measures in the 2006 edition of the World Health Organization Guidelines on the safe use of wastewater in agriculture will require behaviour change along the food chain. Low health risk awareness likely limits adoption of safe food practices in many areas. Based on experiences from Ghana, where infor...

Network

Cited By

Projects

Project (1)
Project
African-German partnership to enhance resource use efficiency and improve food security in urban and peri-urban agriculture of West African cities. www.urbanfoodplus.org