Anthropogenic activities alter drought termination

Margariti, Joanna; Rangecroft, Sally; Parry, Simon; Wendt, Doris; Loon, Anne F. Van

doi:10.31223/osf.io/qjyrm

Cited by 5 publications

(7 citation statements)

References 40 publications

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“…In addition to natural climate variability, the increased human influences on the environment are leading to more intensified drought events (Haile et al, 2019;Jaeger et al, 2019;Margariti, Rangecroft, Parry, Wendt, & Van Loon, 2019). Marvel et al (2019) provided historical evidence of human influences in global droughts since the early 20th century .…”

Section: Drought In the Human-modified Worldmentioning

confidence: 99%

“…Anthropogenic climate change has altered the European river and streamflow discharges, suggesting increased water scarcity in renewable freshwater resources (Gudmundsson, Seneviratne, & Zhang, 2017). Similarly, anthropogenic activities have increased drought termination phases in the Anthropocene, leading to further consequences of drought impacts (Margariti et al, 2019). Specifically, in California, the severe 2011-2015 drought affected ozone air quality by potentially altering the ozone-forming organic reactivities, which showed a decrease by more than 50%, and influenced ozone air pollution (Demetillo et al, 2019).…”

Section: Drought In the Human-modified Worldmentioning

confidence: 99%

“…Hence, incorporating forest legacy effects into climate-carbon cycle models are important for capturing the effects of drought in carbon cycling (Anderegg et al, 2015;van der Molen et al, 2011). Furthermore, in the human-modified world, the increased influence of anthropogenic activities is affecting drought termination phases (Margariti et al, 2019). Human activities including water abstractions, reservoirs, and water transfers are affecting the duration, rate, and recovery time of drought events (Margariti et al, 2019;Schwalm et al, 2017).…”

Section: Drought Recoverymentioning

confidence: 99%

“…Furthermore, in the human-modified world, the increased influence of anthropogenic activities is affecting drought termination phases (Margariti et al, 2019). Human activities including water abstractions, reservoirs, and water transfers are affecting the duration, rate, and recovery time of drought events (Margariti et al, 2019;Schwalm et al, 2017). Hence, drought recovery forecasting is important for improving drought management decisions in the Anthropocene.…”

Section: Drought Recoverymentioning

confidence: 99%

See 3 more Smart Citations

Drought: Progress in broadening its understanding

et al. 2019

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Drought affects many aspects of society and its impact is global. To this end, rendering recurrent drought occurrences is a key research focus. Recently, in addition to existing knowledge, progress in scientific advancements regarding drought have been observed on a regional and global scale. Here, we reviewed and outlined current and emerging scientific developments in drought, focusing on progress made in recent years. In the human‐modified world, the anthropogenic effects on drought were dominant and drought‐frequency showed a prominent increase. In this study, we have identified the development of drought concepts, types, and indices, and their indicators were developed as sector‐specific, comprehensive, and oriented towards multiple scales. Anthropogenic changes have enhanced hydrological processes and affected the development of drought. Urbanization, deforestation, and related human activities have aggravated drought. Climate change has had an exacerbating role in drought, which is expected to increase during the 21st century. Human communities, in particular, are undertaking activities that cause droughts; suffering from and coping with their impact. In addition, the direct and indirect effects of drought need reconsideration. As such, the health impact of droughts is a concern in drought‐vulnerable societies and its burden on public health is largely unknown. The need for drought recovery to aid in effective ecosystem functioning in the aftermath of the drought and the development of mitigation measures to alleviate recurrent drought is critical. Enhanced drought monitoring and management options are required under existing environmental and socio‐economic setups in the 21st century. This article is characterized under: Science of Water > Water Extremes Engineering Water > Planning Water Water and Life > Stresses and Pressures on Ecosystems

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Section: Drought In the Human-modified Worldmentioning

confidence: 99%

Section: Drought In the Human-modified Worldmentioning

confidence: 99%

Section: Drought Recoverymentioning

confidence: 99%

Section: Drought Recoverymentioning

confidence: 99%

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Drought: Progress in broadening its understanding

et al. 2019

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“…Anthropogenic-Induced Causes. Several discourses have pinpointed that human activities are more responsible for water resources depletion within agroecosystems than natural-based causes [54][55][56]. Where this holds true, the problem could be further aggravated by lack of precautionary measures and eventually affect the hydrological circle [29].…”

Section: Constraints To Agricultural Water Managementmentioning

confidence: 99%

A Review on Managing Agroecosystems for Improved Water Use Efficiency in the Face of Changing Climate in Tanzania

Kimaro

2019

Advances in Meteorology

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Agroecosystems are important for food production and conservation of biodiversity while continuing to provide several ecosystem services within the landscape. Despite their economic and ecological benefits, most agroecosystems in Tanzania are degraded at alarming rates. Rapid increase of human population and unprecedented impacts of climate change have influenced depletion of natural resource base within agroecosystem in recent decades compared to what communities have experienced before. Increased food demands owing to population increase have increased pressure on exploitation of land resources including water. Cultivation area and irrigation water demands have increased steadily in the last six decades. Nevertheless, approaches used for water supply have not been improved; thus, water use efficiency in most irrigation schemes is quite poor. Conversely, climate smart agricultural practices are practiced less in Tanzania. There is poor adoption of recommended adaptation among smallholder farmers due to several socioeconomic reasons. One of the key objectives of climate smart agriculture is to improve bio-geochemical interactions within landscape and decrease competition of natural resources between humans and other component of agroecosystems. This underscores the assumptions that most cropping systems in Tanzania are not managed sustainably. Moreover, comprehensive assessment of hydrological dynamics within smallholder farming in Tanzania is highly lacking. Therefore, actual causes and extent of water resources depletion are largely unknown among stakeholders. In most tropical landscapes, water resources degradation is influenced by interaction of both anthropogenic and biophysical factors operating at different times and space scales. As the capacity of water-supplying sources continues to decline, Tanzania needs profound changes in agricultural production systems in order to nourish the growing human population. This calls for strategic approaches that have wider adaptability. A literature survey study with the following objectives was conducted (i) to assess current state of agricultural water use and irrigation activities in Tanzania and (ii) to determine major constraints for sustainable water management and identify appropriate adaptation measures for their improvement across diverse cropping systems.

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Integrated Drought Index based on Vine Copula Modelling

Kanthavel

Saxena

Singh

2022

Intl Journal of Climatology

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As a natural hazard, drought is a complex multivariate phenomenon that does not depend on only one hydrometeorological variable, as well as, considering a particular kind of drought may not be effective for drought management. Considering this, many multivariate drought indices have been developed based on linearity assumptions or conventional copulas assuming symmetric relationships among univariate drought indices. In this study, D-vine copula was applied to construct a four-dimensional index, named as Integrated Drought Index (IDI), by combining four univariate drought indices (Standardized Precipitation Index [SPI], Reconnaissance Drought Index [RDI], Standardized Soil moisture Index [SSI] and Standardized stream flow Drought Index [SDI]) to better reflect many hydrometeorological variables (precipitation, evapotranspiration, soil moisture and stream flow) and different kinds of drought (meteorological, agricultural and hydrological) simultaneously. Vine copula was used to solve nonlinear and asymmetric relationships among drought indices due to its flexibility over the free selection of copula(s) in each step of hierarchical structure in high dimensional modelling. The IDI was constructed for 1-and 4-month timescales for the upper Tapti basin of the central region in India. The performance of IDI was tested with dependence measures (Pearson's correlation coefficient, Mutual Information) and evaluated against the Terrestrial Water Storage Anomaly data derived from the Gravity Recovery and Climate Experiment (GRACE) mission. Spatial analysis of drought was carried out by fuzzy c-means (FCM) clustering algorithm with IDI. IDI based on vine copula solved the nonlinear and asymmetric relationships among different variables associated with the occurrence of droughts effectively with a reduction of uncertainty as compared to the single drought indices for different kinds of droughts. Analysis revealed spatially different drought risks in the upper and lower river basins. In general, the vine copula addresses nonlinear and asymmetric relationships that exist between the variables associated with natural hazards like drought.

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Anthropogenic activities alter drought termination

Cited by 5 publications

References 40 publications

Drought: Progress in broadening its understanding

Drought: Progress in broadening its understanding

A Review on Managing Agroecosystems for Improved Water Use Efficiency in the Face of Changing Climate in Tanzania

Integrated Drought Index based on Vine Copula Modelling

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