1 / 21

FIONA MARSHALL, SPRU, UNIVERSITY OF SUSSEX

WASTE-WATER IRRIGATION & FOOD SAFETY RECOGNITION, REGULATION AND RISK . FIONA MARSHALL, SPRU, UNIVERSITY OF SUSSEX.

espen
Télécharger la présentation

FIONA MARSHALL, SPRU, UNIVERSITY OF SUSSEX

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. WASTE-WATER IRRIGATION & FOOD SAFETY RECOGNITION, REGULATION AND RISK. FIONA MARSHALL, SPRU, UNIVERSITY OF SUSSEX

  2. Peri-Urban AgricultureSmall holder farmers (> 50% landless or < 1ha land) Grain crops for home consumption, but also vital for supply of perishable vegetables to cities e.g. 77% spinach (D), 43% aubergine (V)70-90% households involved in agriculture and 25-60% household income Very little formal support accessedHighly dynamic transition zone, rapid environmental degradation worsening levels of discrimination & changing health concerns.

  3. Social Technological and Environmental Pathways to Sustainability Contaminated irrigation water and food safety for the urban and peri-urban poor: in India and Zambia Project funded by UK DFID

  4. Areas to address To use a case study of wastewater use linked to food safety concerns in India to illustrate: • The link between environmental pollution-wastewater irrigation-food safety &livelihoods. • Areas of oversight in formal policy and planning • The role of regulation • Does regulation reduce risk? • Some Immediate priorities

  5. Case study on wastewater use and food safety in India – as systems perspective • Assess heavy metal contamination of vegetables in Varanasi and implications for health & livelihoods. • Investigate relationships between crop contamination, wastewater irrigation and industrial pollution sources. • Work with local stakeholders to explore current practices, concerns, perceptions, adaptation, actions. • Determine practical measures to ameliorate impacts of heavy metal pollution on food safety. • Engage with institutional and policy processes to identify opportunities towards alternative (more Sustainable) management approaches.

  6. Assessing heavy metal contamination Wide range of crops grown around Delhi and Varanasi have been tested for contamination Including - Bhindi, Palak, Cauliflower, Cabbage, Wheat, Tomato, Brinjal, Radish, Pumpkin, Wheat, Amaranthus Heavy metals Cadmium, Zinc, Nickel, Manganese, Copper, Lead, Chromium

  7. Heavy metal contamination in the food basket of peri-urban communities – levels far in exceedence of ‘safe’ permissible limits.

  8. Lead contamination exceeds standards (many fold) at wastewater irrigated sites

  9. High levels of heavy metals in a range of crops were directly linked to irrigation with wastewater (as opposed to other possible sources.

  10. There are a range of potential technical interventions • Find effective means of tackling pollution at source e.g. additional effluent treatment or bioremediation. BUT no simple relationship between levels in water and levels in crops. Location, crop and practice specific. • Ameliorate the impacts of using polluted water sources. e.g. soil treatments, Fertiliser regimes, specific cultivars, Low cost monitoring, farmer support mechanisms

  11. Policy fields related to wastewater irrigation in peri-urban areas Farmers Health & Nutrition Policy Consumers Livelihood Environment Policy Contaminated Crop Industrial Pollution Food Safety Policy Effluent/ sewage Irrigation water Industrial zoning Contaminated soil Agricultural Practices Urbanisation Urban Planning Irrigation Management Agricultural Policy Water Policy

  12. Key gaps in formal recognition • Wastewater not officially recognized as a source of irrigation water. • No formal recognition of the link between industrial pollution and food safety – and particular threat to the poor. • No irrigation water quality standard for heavy metals in India and many other countries. • No priority given in food safety policy to the monitoring of fresh produce important to the poor.

  13. Regulatory Approaches Following formal recognition… • Standards for heavy metals in irrigation water • But levels in water don’t necessarily reflect levels in crops • Existing monitoring programme overstretched • Complexities of multiple sources etc for polluter pays • Amend and enforce standards for fresh produce - Contamination an invisible credence property that often requires regulation. -But likely to adversely affect poor producers and consumers. -Shortfalls of new food safety authority. Need a framework for management of wastewater (industrial, domestic, treated/untreated, partially treated) within the broader framework of water management, environmental pollution and food safety and security strategies.

  14. Does regulation reduce risk? How inclusive are regulatory ‘framings’ of experience and concerns of poorer communities? Regulation can reinforce or hinder particular technological pathways. Should emphasis be on controlling known risks, or developing resource management strategies capable of adapting to change whilst preserving environmental integrity and social justice?

  15. Towards Sustainable waste-water management • Develop means to incorporate user practices, concerns and aspirations, in all their diversity, in decision making. • Actor oriented approaches that recognise the role of power and politics – beyond ‘supply’ • Integrating mechanisms needed i) across disciplines and sectors and ii) across research and policy • From food chains to systems perspectives (socio-ecological/technical)- • Build on successes in participatory approaches in water management and tools for social appraisal.

  16. Some recommendation from our Indian case study • Formal recognition of wastewater irrigation is essential • Urgent action needed to ameliorate impacts of heavy metal contamination of crops in badly affected areas whilst longer term strategies emerge. • Need for comprehensive status report on wastewater irrigation (extent, livelihood opportunities and threats, health links – different perspectives) • Formal recognition and awareness raising of link with industrial pollution & food safety required - but in context of other opportunities and threats of wastewater reuse. • Establish multistakeholder platforms and innovative approaches to illucidate appropriate technological choices and pathways to Sustainable water management.

  17. Social Technological and Environmental Pathways to Sustainability Thank You! Fiona Marshall Science and Technology Policy Research University of Sussex Email: F.Marshall@sussex.ac.uk

More Related