Developing drought resilience in irrigated agriculture in the face of increasing water scarcity

Rey, Dolores; Holman, Ian P.; Knox, Jerry W.

doi:10.1007/s10113-017-1116-6

Cited by 82 publications

(62 citation statements)

References 31 publications

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“…2a in Ljungqvist et al (2016) and farmland [Q54−56], where irrigation and its associated costs are considered important research questions (e.g. Rey et al 2017).…”

Section: Adaptationmentioning

confidence: 99%

Priority questions in multidisciplinary drought research

Trnka

Hayes²,

Jurečka³

et al. 2018

Clim. Res.

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Full affiliations in Supplement 1 at www. int-res. com/ articles/ suppl/ c075 p241 _ supp. pdf ABSTRACT: Addressing timely and relevant questions across a multitude of spatio-temporal scales, state-of-the-art interdisciplinary drought research will likely increase in importance under projected climate change. Given the complexity of the various direct and indirect causes and consequences of a drier world, scientific tasks need to be coordinated efficiently. Drought-related research endeavors ranging from individual projects to global initiatives therefore require prioritization. Here, we present 60 priority questions for optimizing future drought research. This topical catalogue reflects the experience of 65 scholars from 21 countries and almost 20 fields of research in both natural sciences and the humanities. The set of drought-related questions primarily covers drought monitoring, impacts, forecasting, climatology, adaptation, as well as planning and policy. The questions highlight the increasingly important role of remote sensing techniques in drought monitoring, importance of drought forecasting and understanding the relationships between drought parameters and drought impacts, but also challenges of drought adaptation and preparedness policies.

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“…2a in Ljungqvist et al (2016) and farmland [Q54−56], where irrigation and its associated costs are considered important research questions (e.g. Rey et al 2017).…”

Section: Adaptationmentioning

confidence: 99%

Priority questions in multidisciplinary drought research

Trnka

Hayes²,

Jurečka³

et al. 2018

Clim. Res.

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“…heatwaves or dry conditions can increase the local groundwater use. Another explanation for increased groundwater use could be related to surface water use restrictions (voluntarily or mandatory) that might be in place before a major groundwater drought (Rey et al, 2017;Rio et al, 2018). The reduced surface water availability is then replaced with groundwater, resulting in lowered groundwater levels and potentially aggravating a groundwater drought.…”

Section: Groundwater Droughtsmentioning

confidence: 99%

Asymmetric impact of groundwater use on groundwater droughts

Wendt¹,

Loon²,

Bloomfield³

et al. 2020

Preprint

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Abstract. Groundwater use affects groundwater storage continuously, as the removal of water changes both short-term and long-term variation in groundwater level. This has implications for groundwater droughts, i.e. a below-normal groundwater level. The impact of groundwater use on groundwater droughts remains unknown. Hence, the aim of this study is to investigate the impact of groundwater use on groundwater droughts adopting a methodological framework that consists of two approaches. The first approach compares groundwater monitoring sites that are potentially influenced by abstraction to uninfluenced sites. Observed groundwater droughts are compared in terms of drought occurrence, magnitude, and duration. The second approach consists of a groundwater trend test that investigates the impact of groundwater use on long-term groundwater level variation. This framework was applied to a case study of the UK. Four regional water management units in the UK were used, in which groundwater is monitored and abstractions are licensed. The potential influence of groundwater use was identified on the basis of relatively poor correlations between accumulated standardised precipitation and standardised groundwater level time series over a 30-year period from 1984 to 2014. Results of the first approach show two main patterns in groundwater drought characteristics. The first pattern shows an increase of shorter drought events, mostly during heatwaves or prior to a long drought event for influenced sites compared to uninfluenced sites. This pattern is found in three water management units where the long-term water balance is generally positive and annual average groundwater abstractions are smaller than recharge. The second pattern is found in one water management unit where temporarily groundwater abstractions exceeded recharge. In this case, groundwater droughts are lengthened and intensified in influenced sites. Results of the second approach show that nearly half of the groundwater time series have a significant trend, whilst trends in precipitation and potential evapotranspiration time series are negligible. Detected significant trends are both positive en negative, although positive trends dominate in most water management units. These positive trends, indicating rising groundwater levels, align with changes in water use regulation. This suggests that groundwater abstractions have reduced during the period of investigation. Further research is required to assess the impact of this change in groundwater abstractions on drought characteristics. The overall impact of groundwater use is summarised in a conceptual typology that illustrates the asymmetric impact of groundwater use on groundwater drought occurrence, duration, and magnitude. The long-term balance between groundwater abstraction and recharge appears to be influencing this asymmetric impact, which highlights the relation between long-term and short-term sustainable groundwater use.

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“…Governmental actors will need to effectively communicate with water users in order to enhance coordination and drought response (Urquijo & De Stefano, 2016). The challenge of balancing the multiple competing demands for water (including the environment) within a changing climate, while supporting food security and rural livelihoods, will require a multiscale adaptive drought management framework (Holman & Trawick, 2011) that brings together regulators, collective action, and farmers' response (Rey et al, 2017), reconciles their competing demands (Knox et al, 2018), and learns from international drought management experiences (e.g., Iglesias et al, 2018).…”

Section: Implications For Future Drought Managementmentioning

confidence: 99%

A Probabilistic Risk Assessment of the National Economic Impacts of Regulatory Drought Management on Irrigated Agriculture

et al. 2019

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Drought frequency and intensity is expected to increase in many regions worldwide, and water shortages could become more extreme, even in humid temperate climates. To protect the environment and secure water supplies, water abstractions for irrigation can be mandatorily reduced by environmental regulators. Such abstraction restrictions can result in economic impacts on irrigated agriculture. This study provides a novel approach for the probabilistic risk assessment of potential future economic losses in irrigated agriculture arising from the interaction of climate change and regulatory drought management, with an application to England and Wales. Hydrometeorological variability is considered within a synthetic data set of daily rainfall and river flows for a baseline period (1977–2004) and for projections for near future (2022–2049) and far future (2072–2099). The probability, magnitude, and timing of abstraction restrictions are derived by applying rainfall and river flow triggers in 129 catchments. The risk of economic losses at the catchment level is then obtained from the occurrences of abstraction restrictions combined with spatially distributed crop‐specific economic losses. Results show that restrictions will become more severe, more frequent, and longer in the future. The highest economic risks are projected where drought‐sensitive crops with a high financial value are concentrated in catchments with increasingly uncertain water supply. This research highlights the significant economic losses associated with mandatory drought restrictions experienced by the agricultural sector and supports the need for environmental regulators and irrigators to collaboratively manage scarce water resources to balance environmental and economic considerations.

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Developing drought resilience in irrigated agriculture in the face of increasing water scarcity

Cited by 82 publications

References 31 publications

Priority questions in multidisciplinary drought research

Priority questions in multidisciplinary drought research

Asymmetric impact of groundwater use on groundwater droughts

A Probabilistic Risk Assessment of the National Economic Impacts of Regulatory Drought Management on Irrigated Agriculture

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