Geological structure of the coastal aquifer in the southern part of the Gaza Strip, Palestine
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Cited by 4 publications
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This article evaluates the potential for agency exercised by the subterranean volume in geopolitical conflict. Joining recent geographical conceptualisations of territory as a volumetric assemblage with calls for an elemental geopolitics, it argues that the density of the underground layer creates a convoluted technopolitical problem that obfuscates the state's means of directly observing, visualising and knowing the topological space of territory. To illustrate this, a methodological approach based on the relational ontologies of actor-network-theory (ANT) and assemblage theory is applied to an empirical study of the geophysical sensing techniques used by Israeli engineers, scientists and military to manage cross-border tunnels built by the Palestinian militant group Hamas before and after the 2014 Gaza war. The soil conditions, settlement patterns and infrastructures in the Gaza-Western Negev region have necessitated experimentation with complex and multiple forms of scientific and political expertise in attempts to locate the invisible tunnels, alongside a shift towards increasingly oblique techniques of cartographic representation of the subsurface. The contingency of these efforts has unsettled the State of Israel's confidence in its ability to manage geopolitical risks through techniques of territorial control. This case raises poignant questions about the extent of the capacities and limitations of technological solutions and geopolitical practices to secure territory when confronted with the geophysical agency of the underground. Introduction: Material Agency and Geopolitics The elemental properties of the Earth in a particular place exert influence on the strategic efficacy of the military, and by extension the political agency of the state. Put differently, the materialities and processes of the physical environment play an active role in shaping geopolitical processes (Adey and Anderson 2011; Barry 2013a, 1-2). Shaw notes that the ''relationship between violence and the environment has persisted since the dawn of humanity.. . all that has changed is the scale, intensity, and technical CONTACT Ian Slesinger
This article evaluates the potential for agency exercised by the subterranean volume in geopolitical conflict. Joining recent geographical conceptualisations of territory as a volumetric assemblage with calls for an elemental geopolitics, it argues that the density of the underground layer creates a convoluted technopolitical problem that obfuscates the state's means of directly observing, visualising and knowing the topological space of territory. To illustrate this, a methodological approach based on the relational ontologies of actor-network-theory (ANT) and assemblage theory is applied to an empirical study of the geophysical sensing techniques used by Israeli engineers, scientists and military to manage cross-border tunnels built by the Palestinian militant group Hamas before and after the 2014 Gaza war. The soil conditions, settlement patterns and infrastructures in the Gaza-Western Negev region have necessitated experimentation with complex and multiple forms of scientific and political expertise in attempts to locate the invisible tunnels, alongside a shift towards increasingly oblique techniques of cartographic representation of the subsurface. The contingency of these efforts has unsettled the State of Israel's confidence in its ability to manage geopolitical risks through techniques of territorial control. This case raises poignant questions about the extent of the capacities and limitations of technological solutions and geopolitical practices to secure territory when confronted with the geophysical agency of the underground. Introduction: Material Agency and Geopolitics The elemental properties of the Earth in a particular place exert influence on the strategic efficacy of the military, and by extension the political agency of the state. Put differently, the materialities and processes of the physical environment play an active role in shaping geopolitical processes (Adey and Anderson 2011; Barry 2013a, 1-2). Shaw notes that the ''relationship between violence and the environment has persisted since the dawn of humanity.. . all that has changed is the scale, intensity, and technical CONTACT Ian Slesinger
The Eastern Mediterranean region of the Middle East and North Africa (MENA) is experiencing patterns of major drought due to the effects of rising temperatures and falling precipitation levels. The multiscale drought evaluation Standardized Precipitation Evapotranspiration Index (SPEI) reveals evolving and severe drought from North Africa and the Sinai desert toward the Middle East. While there has been a period without drought between 1970 and 1990, the severity and frequency of drought increased considerably after 1990. Current drought conditions in the Eastern Mediterranean region of MENA is moderate to severe with a 60–100% likelihood of occurrence, according to time parameters. The Gaza Strip is especially vulnerable to the consequences of increasing drought because it is situated in the vicinity of the Sinai Desert; therefore, a downscaled study of drought in the region is essential to implement mitigation measures for the sustainable management and planning of coastal aquifer and agricultural activities in the Gaza Strip. Considerable availability of precipitation time series from various meteorological stations helped provide a local drought study for the Gaza Strip, in accordance with the Standardized Precipitation Index (SPI). The stochastic time-series model of (4,0,1) (5,1,1)12 shows a robust simulator for modeling and forecasting the future trend of precipitation at the nine meteorological stations. In terms of correlation accuracy, the model achieves a correlation (r) of approximately 93–97% in the calibration range and a correlation (r) of about 92–99% in the validation range. In terms of measuring the difference between the values, the root mean squared error (RMSE) of the model results shows that the RMSE was between 7–21 in the calibration range and 11–21 in the validation range. The model reveals a slightly stable trend in precipitation patterns at the northern meteorological stations of Beit Hanon, Beit Lahia, Shati, and Remal. However, declining precipitation tendency was recorded at the southern meteorological stations of Mughraka, Nussirat, Beir Al-Balah, Khanyounis, and Rafah. The SPI-based drought assessment implies that the precipitation annual threshold levels at SPI = 0 drop territorially from 474 mm in the north to about 250 mm in the south of the Gaza Strip. In this study, a representative 12-month local scale SPI12 at an annual precipitation threshold level of 370 mm was formulated to address the drought conditions in the Gaza Strip. Standing on the outputs of the local SPI12 scale might signify that the region of the Gaza Strip risks drought status with an incidence likelihood varying from 8% in the north to 100% in the south. Regular drought is prevalent in the northern governorates, but the hazards of extreme and severe drought are high in the southern areas with an incidence risk of about 83%. Sequentially, southern governorates of Rafah and Khanyounis experience chronic annual drought, while the return period of drought is reported to be every 9–12 years in the northern governorates of the Gaza Strip. The rain-fed years of 1998 and 2010 reported the worst periods of drought, while the period of 2016 showed a good droughtless water balance. Overall, the no-drought status might define the prospective conditions in the governorates of North Gaza, Gaza, and central Gaza over the next 20 years, while Rafah and Khanyounis are anticipated to be under normal to severe drought conditions.
Smuggling and warfare tunnels are unique structures that have rarely been studied from an engineering perspective. A notable example is the vast networks of tunnels that were secretly constructed underneath the Gaza Strip. Particularly because these tunnels were not designed and constructed via traditional engineering practice, they constitute an interesting case study. The tunnels are supported by thin precast concrete elements, with the wall elements being the critical structural element. While some instances of structural failure and collapse have been reported in the media, a great number of the tunnels have remained stable. In this paper, we attempt to conduct a forward analysis to estimate the load and response of the wall elements. We estimate the range of problem input parameters based on multiple sources, including media accounts, geological research papers, and geotechnical reports obtained from the vicinity of the Gaza tunnels. The problem is then analyzed using two approaches: (1) a simplified structural analysis based on lateral earth-pressure theory and (2) numerical modeling. Both analysis methods show that the wall elements should fail due to compression even under the most favorable estimates of input parameters, in contrast to actual reality. We discuss possible explanations for this disparity. While it is not possible to pinpoint the exact explanation, we argue that current geotechnical practice is generally biased toward conservatism, even prior to the application of safety factors.
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