Risk transfer from a megacity to a peri-urban agricultural community: wastewater reuse and effects on groundwater quality

2021 ◽  
Vol 193 (11) ◽  
Author(s):  
María Alejandra Fonseca-Salazar ◽  
Carlos Díaz-Avalos ◽  
Hermes Rochin-García ◽  
Ana Cecilia Espinosa-García ◽  
Marisa Mazari-Hiriart
2021 ◽  
Author(s):  
Nicolas Choquette-Levy ◽  
Matthias Wildemeersch ◽  
Michael Oppenheimer ◽  
Simon Levin

Abstract Increasing climate stress is likely to significantly impact smallholder farmer livelihoods, and can lead to divergent adaptation pathways. However, empirical evidence is inconclusive regarding how climate affects smallholder farmers’ deployment of various livelihood strategies, including rural-urban migration, especially as these impacts become more severe. Here we use an agent-based model to show that in a South Asian-type agricultural community experiencing a 1.5oC temperature increase by 2050, climate impacts are likely to decrease household income in 2050 by an average of 28 percent relative to the same income under a stationary climate, with fewer households engaging in economic migration and investing in cash crops. Pairing a small cash transfer with risk transfer mechanisms significantly increases the adoption of alternative livelihood strategies, improves community incomes, and reduces community inequality. While specific results depend on contextual factors such as risk preferences and climate risk exposure, these interventions are robust in improving adaptation outcomes by addressing the intersection of risk aversion, financial restrictions, and climate impacts.


2020 ◽  
Vol 12 (23) ◽  
pp. 9835
Author(s):  
Lindsey Hartfiel ◽  
Michelle Soupir ◽  
Rameshwar S. Kanwar

The small Mediterranean country of Malta, an island located between Italy and North Africa, has been facing and will continue to face water stress and scarcity in the coming years, receiving the designation as the most water stressed country in Europe. In the past, Malta’s water challenges were centered around water quantity concerns, but in more recent years, the severity of their water stress has been strengthened by the deterioration of the groundwater quality and quantity. Through the over-extraction of their groundwater, saltwater intrusion has steadily occurred into their freshwater aquifer systems, worsening their groundwater quality for both domestic and agricultural purposes. The objective of this paper is to conduct an extensive review on the history of Malta’s water problems and how Malta is working to combat its water scarcity concerns. Additionally, this paper investigates the impact of Malta’s water scarcity on its food and energy security challenges. Our study concludes that while Malta has obstacles to overcome in their pursuit of water security and sustainable development, the future remains hopeful, with several alternatives still available. Some of the alternatives explored in this review include wastewater reuse, increased awareness, use of alternative energy sources, rainwater harvesting, and implementation of nation-wide strategic water policies.


2015 ◽  
Vol 6 (3) ◽  
pp. 454-463 ◽  
Author(s):  
Mounir El Heloui ◽  
Rachida Mimouni ◽  
Fatima Hamadi

The Tiznit region has an arid to semi-arid climate. Rainfall is scarce and the reuse of wastewater for crop irrigation is common, and consequently groundwater can be contaminated by chemical and biological pollutants. A wastewater treatment plant is constructed with the aim of producing water suitable for reuse in agriculture and reducing groundwater pollution. The aim of this study is to assess the impact of factors that may influence groundwater quality, namely wastewater reuse and fertilizer use in the region. Groundwater was collected monthly over 1 year from five shallow wells (P1–P5) and analysed for a range of physicochemical and microbiological parameters. Concentrations frequently exceeded the WHO standards for potable water. The average concentration of nitrate was 98 mg/L. Conductivity varied from 1,930 to 2,500 μS/cm over four of the wells but was 11,703 in P3, which was close to the treatment plant. Bacteriological contamination was also found, with total coliforms varying from 0 at P1 to 9,000 cfu/100 mL at P4 and fecal coliforms (FC) 0 in P1, P2, P3 and P5 but up to 250 FC/100 mL at P4. Fecal streptococci (FS) varied from 0 to 3,500 FS/100 mL at P4. These values widely exceeded the limit for bacteria in water (0 units/100 mL).


Agronomie ◽  
2001 ◽  
Vol 21 (3) ◽  
pp. 267-276
Author(s):  
Daniela Businelli ◽  
Enrico Tombesi ◽  
Marco Trevisan

2011 ◽  
Vol 4 (4) ◽  
pp. 228-230
Author(s):  
Patil S.S Patil S.S ◽  
◽  
Gandhe H.D Gandhe H.D ◽  
Ghorade I.B Ghorade I.B

2016 ◽  
Vol 4 (4) ◽  
pp. 30
Author(s):  
Nooriha Abdullah ◽  
Darinka Asenova ◽  
Stephen J. Bailey

The aim of this paper is to analyse the risk transfer issue in Public Private Partnership/Private Finance Initiative (PPP/PFI) procurement documents in the United Kingdom (UK) and Malaysia. It utilises qualitative research methods using documentation and interviews for data collection. The UK documents (guidelines and contracts) identify the risks related to this form of public procurement of services and makeexplicittheappropriateallocation of those risks between the public and the private sector PPP/PFI partners and so the types of risks each party should bear. However, in Malaysia, such allocation of risks was not mentioned in PPP/PFI guidelines. Hence, a question arises regarding whether risk transfer exists in Malaysian PPP/PFI projects, whether in contracts or by other means. This research question is the rationale for the comparative analysis ofdocumentsand practicesrelatingtorisk transfer in the PPP/PFI procurements in both countries. The results clarify risk-related issues that arise in implementing PPP/PFI procurement in Malaysia, in particular how risk is conceptualised, recognised and allocated (whether explicitly or implicitly), whether or not that allocation is intended to achieve optimum risk transfer, and so the implications forachievement ofvalue for moneyor other such objectivesinPPP/PFI.


2016 ◽  
Vol 12 (3) ◽  
pp. 4383-4393
Author(s):  
Osabuohien Idehen

This study takes a look into groundwater quality at Ugbor Dumpsite area using water quality index (WQI), 2-Dimensional (2-D) geophysical resistivity tomography and vertical electric sounding (VES).The geophysical resistivity methods employed revealed the depth to aquifer, the geoelectric layers being made up of lateritic topsoil, clayed sand and sand. Along the trasverse line in the third geoelectric layer of lateral distance of 76 m to 100 m is a very low resistivity of 0.9 to 13 m from a depth range o f about 3 to 25 m beneath the surface- indicating contamination. Water samples were collected and analyzed at the same site during the raining season and during the dry season. The value of water quality index during the raining season was 115.92 and during the dry season was 147.43. Since values at both seasons were more than 100, it implies that the water is contaminated to some extent and therefore poor for drinking purpose. The Water Quality Index was established from important analyses of biological and physico-chemical parameters with significant health importance. These values computed for dumpsite area at Ugbor were mostly contributed by the seasonal variations in the concentrations of some parameters, such as, conductivity, total dissolved solids, hardness, alkalinity, chlorides, nitrates, calcium,  phosphates, zinc, which showed significant differences (P<0.01 and P<0.05) in seasonal variation.


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