Wadi Araba Research Articles

Integrated stratigraphical, hydrogeochemical, and geophysical studies to characterize the shallow groundwater aquifers in Wadi Araba area, western Gulf of Suez, Egypt

The construction of the New Galala City besides great mining (e.g., konoozmisr) and Seawater Reverse Osmosis Desalination Plant projects in the semiarid Gulf of Suez region of Egypt increases the demand for groundwater resources. So, the current research provides integrated stratigraphical, hydrogeochemical, and geophysical studies to investigate the shallow groundwater aquifers in Wadi Araba area on the western side of the Gulf of Suez. The stratigraphic column starts with pre-Cambrian basement rocks which are non-conformably overlain by sedimentary succession of Phanerozoic Erathem. A detailed land magnetic profile has been conducted and processed to estimate the aquifer’s geometrical parameters. This includes the subsurface spatial extension and thickness to delineate the prevailed subsurface structures in the study area. Lithostratigraphically, these aquifers are represented by the Paleozoic- lower Cretaceous siliciclastic-dominated sediments of the Nubia Group and fractured carbonate-dominated facies of the upper Cretaceous Galala Formation. Lithological characters, sedimentary facies (fluvial to shallow and open marine), microfacies types, and diagenesis processes (e.g., compaction, cementation, dissolution, and fracturing) are the main factors that affect the quality of the shallow aquifers in the study area. The main microfacies of the studied aquifers are quartz arenite, subarkose, sublitharenite, mudstone/wackestone, and packstone/grainstone. These facies are characterized by different primary and secondary porosities. According to the water sampling standard methods, nineteen groundwater samples were collected from the available hand-dug wells and springs from the Nubian sandstone aquifer and the Upper Cretaceous aquifer, respectively. Inductively coupled plasma–mass spectrometry (ICP–MS), titration, spectrophotometer and a flame photometer were used to obtain a complete chemical analysis. The results of hydrochemical analyses indicated that total dissolved solids (TDS) and concentrations of major ions as well in the lower Cretaceous aquifer increase toward the Gulf of Suez and in general higher than that of springs of the Upper Cretaceous Aquifer. The predominant factors influencing groundwater chemistry include seawater intrusion, evaporation, mineral alteration, dissolution of fossils, and ion exchange. Groundwater in the study area is unsuitable for drinking except in one sample and moderately suitable for irrigation with caution for higher salinity in samples located near the Gulf of Suez.

Groundwater management in the face of climate change: enhancing groundwater storage in the alluvium aquifer of Wadi Araba, Jordan, through GIS-based managed aquifer recharge and groundwater MODFLOW

Abstract Groundwater is critical in countries such as Jordan, yet demand exceeds availability due to population expansion and arid conditions. The goal of this research is to address water scarcity and adapt to reduced rainfall by investigating the soil aquifer and evaluating the efficiency of managed aquifer recharge (MAR). The Wadi Araba Basin's alluvium aquifer is particularly important and contains a groundwater divide, with water flowing towards the Red Sea to the south and the Dead Sea to the north, as determined by rigorous modelling and scenario analysis. Precipitation infiltration is an important consideration in groundwater budget modelling. This study employs 12 monitoring wells to establish an acceptable relationship between estimated and observed water levels. Furthermore, the study creates a MAR suitability map, which evaluates eight potential MAR locations in the Wadi Araba region. According to forecasted scenarios, implementing MAR in conjunction with increased precipitation recharge has the potential to ameliorate the consequences of decreased rainfall in the model region. The plan aims to raise the water table in three areas by 1.96–3.12%, providing realistic solutions to enhance water availability and adapt to climate change.

Tectonic Analysis of the Tall Al Qarn Pressure Ridge, Dead Sea Transform Fault, Jordan

Jordan's Dead Sea Transform is made up of three morphotectonic elements: Wadi Araba, Dead Sea Basin, and Jordan Valley. A few pressure ridges and depressions exist in the Jordan Valley Fault. Among these, the Tall Al Qarn pressure ridge is one of the active Dead Sea Transform's morphotectonic features. Stratigraphically, the Waqqas (Miocene), Ghor Al Katar (Early Pleistocene), and Lisan (Late Pleistocene) Formations constitute the rock outcrops in the study area. The ridge was created when the sinistral strike-slip fault of the Jordan Valley bent rightward. The major structures include the Waqqas and Ghor Al Katar inclined beds, the NW-SE oriented normal and NE-SW reverse faults and the ESE-WNW oriented dextral strike-slip faults. Faults and folds indicate a local NW-SE compressional stress caused by the sinistral Jordan Valley Fault's right bending. The steeply dipping Ghor Al Katar strata, which are overlain by the horizontal Lisan beds, display a prominent angular unconformity. Many horizontal Lisan beds exhibit abundant synsedimentary deformational features, indicating the energetic seismic activity at that time.

Late Cenomanian–early Turonian ammonite successions of north Eastern Desert, Egypt: biostratigraphy and paleobiogeographic implications

The upper Cenomanian-lower Turonian sequence of Egypt yield a remarkably diverse and plentiful ammonite fauna. Three stratigraphic sections located on Wadi Araba, north of the Southern Galal Plateau were investigated. Lithostratigraphically, the measured sections are subdivided from base to top into the Malha (pre-Cenomanian), Galala (Cenomanian) and Maghra El Hadida (Turonian) formations. Over a hundred well-preserved and nearly complete ammonite internal molds were collected. The studied ammonites are systematically classified as Vascoceratidae, Pseudotissotiidae, Acanthoceratidae and Engonoceratidae. Vascoceratidae and Pseudotissotiidae comprise 75% of the identified ammonites. Twelve ammonite species have been identified. Six late Cenomanian-early Turonian ammonite biozones are proposed herein: Neolobites vibrayeanus, Vascoceras gamai, Vascoceras cauvini, Vascoceras proprium, Choffaticeras segne, and Wrightoceras munieri. The identified ammonite biozones are correlated with NW European standard zonation and the Tethyan biostratigraphical schemes was performed. The first occurrences of Vascoceras proprium, as well as the first occurrences of the inoceramids Mytiloides kosmati and Mytiloides puebloensis define the Cenomanian-Turonian boundary. The diversity and abundance of studied fossil groups varied dramatically over the C/T transition. In the latest Cenomanian, all identified Cenomanian species had become extinct. Only three species have reached the Turonian time. The paleobiogeographic implications of the descried ammonites are thoroughly discussed. The paleogeographic distribution of the studied ammonite fauna shows that the majority of the described species are restricted to the shallow shelf of the southern Tethys.

Providing water sources to insectivorous bats for conservation biological control in arid date plantations

Balance between the high demand for agricultural production and the negative environmental impact of intensive agriculture requires the development of sustainable agricultural approaches. One such approach is conservation biological control (CBC), which aims at enhancing pest suppression by using natural enemies, such as predators and parasites. Insectivorous bats are considered as potential natural enemies for CBC of insect agricultural pests. Bats drink from open water sources and forage above them, hence we hypothesized that supplementation of artificial water pools adjacent to desert date plantations might promote the activity and species richness of insectivorous bats in this habitat, thereby contributing to pest suppression. We predicted that bats will be more attracted to the pools during summer, when other water sources are scarce, than during spring. In addition, we explored the effect of water supplements on the desert bat community structure. Eight pools were installed in a date plantation in the hyper-arid Arava valley, Israel. Bats were acoustically monitored during three experimental stages: 1) before filling the pools with water; 2) while the pools held water and 3) after emptying them. The lesser date moth (Batrachedra amydraula), a major date pest, was monitored using pheromone traps in parallel with the experimental stages. We found that the pools increased bat activity in summer, but not in spring, while species richness was not affected in either season. The local bat community structure was significantly altered while the pools held water, but not due to increased activity of synanthropic Mediterranean species at the expense of local desert species. The number of individuals of the lesser date moth near the pools decreased with the increase in bat activity. Our results support the idea that seasonal water supplementation enhances bat activity in arid farmlands with potential contribution to pest control and the actual contribution to pest suppression should be further quantified. We suggest that the integration of small artificial pools to promote agricultural pest predation by bats may help reduce crop loss and potentially contribute to the conservation of desert bat communities by adding water sources.

Appraisal of multilayer aquifer system for sustainable groundwater management in Wadi Araba, Eastern desert, Egypt

Wadi Araba is an important economic area in Egypt due to the presence of numerous species of flora and fauna. The problem is the lack of information on the aquifer system. This study aims to investigate the characteristics of the aquifer system within the scope of the groundwater potentiality, types of the aquifer system, types of groundwater interface, and groundwater layers interaction in the study area. Six wells were drilled at three depths (±300 m, 600 m, and 1200 m) to identify the different characteristics of the aquifer. The results showed that there are three groundwater layers separated by shale sheets that are not interacting together. The higher extraction potentiality of groundwater from the aquifer is from the upstream (340–400 m2 day−1). While the lower extraction potentiality is from midstream (10–50 m2 day−1) followed by the downstream (20 m2 day−1) with significant differences compared to upstream. The water quality analysis showed that higher salinity was recorded downstream side, where the Wadi encounters the lower units of the Gulf of Suez. Eventually, there is a limitation on the exploitation of groundwater in the aquifer for intensive agricultural development. This is because the aquifer potentiality ranges from weak to medium.

UNITED STATES FOREIGN POLICY TOWARDS JORDAN FROM THE POLITICAL AND SECURITY DIMENSIONS FROM 1990 TO 2017

Foreign policy is an integral part of international relations. This study examines the United States (US) foreign policy towards Jordan from 1990 to 2017 since the period witnessed important regional and international political events that significantly impacted the US foreign policy. These events have the greatest impact on the development of relations between the two countries in terms of political and security aspects. The study looks at four political events and their impacts on Jordanian-American relations from the political and security aspects. Therefore, the objectives of this study are to examine the US foreign policy towards Jordan from the political and security aspects. This study adopted the qualitative approach. The primary data were collected from interviews while the secondary data were obtained from books, journals, theses, newspapers, seminar papers, articles and other documents. In this study, 16 respondents from political, economic and security experts in Jordan and the US were selected for semi-structured interviews. The study employed Thematic Analysis in analysing the data obtained. This study adopted the neo-realism theory as a theoretical framework. This study found that the US foreign policy recognizes Jordan as a close ally and considers its stability very important. The US foreign policy was seen slightly negative towards Jordan during the Iraqi War on Kuwait in 1990. However, the Wadi Araba peace treaty between Jordan and Israel in 1994 had promoted positive US foreign policy towards Jordan. This policy was slightly weakened in 2017 due to the transfer of the US Embassy to Jerusalem. Certain political events play an important role in the US foreign policy regarding security aid towards Jordan. The study found that the US foreign policy provides security support to Jordan to protect Israel, spread American ideology and fight against its enemy. This research also found that Jordan has a suitable location to defend Israel because the country is surrounded by important Arab countries. The US links its aids to Jordan due to political events. Accordingly, the study recommends the necessity for the Jordanian state to increase its influential economic alliances at the international level. In addition, Jordanian policy must be redrawn in line with international realities to pressure the US to make Jordan play an active role in the region and international arena. Jordan should better use its geographical location to achieve international cooperation and enhance Arab security as a barrier against Israel.

Hydrogeochemical characterization of groundwater resources in Wadi Araba Basin, Southern Jordan

Groundwater quality is an important factor that determines its usage for drinking and irrigational use. This study was carried out along the quaternary alluvial aquifer which extends along Wadi Araba groundwater basins, in southern Jordan. Chemical and physical parameters were measured and analyzed for thirty-seven groundwater samples collected from twenty-one wells in the study area during two periods in the year 2019; the spring season (April–May) was represented by fourteen samples and the autumn season (August–September) represented by twenty-three samples were collected to determine its suitability for drinking and irrigational purposes. The groundwater in the study area is generally of low alkalinity with an average pH value of less than 8 for both spring and autumn seasons. The water of the area is excessively mineralized due to salinity, and the increase in water salinity of the southern Wadi Araba basin is less expressed than in the northern part. The hydrochemical characterization shows that most wells of the study area are characterized by HCO3–Ca–Mg and HCO3–SO4–Ca–Mg types in the eastern escarpments of Wadi Araba (i.e., recharge area) and Cl–SO4–Na and Cl–Na types in the discharge area. There is no substantial change in the hydrochemical composition during the two seasons. Based on the Piper diagram, most of the groundwater samples (91.8%) belong to class “E” as “earth alkaline water with increased portions of alkalis with prevailing sulfate and chloride.” The Durov diagram reveals that most groundwater samples (62.2%) lay in the water genesis “field 6” which indicates that the water may be related to the reverse ion exchange of Na–Cl. The chemical composition of the water samples was compared with the drinking water standards of the World Health Organization and the Jordanian Standard. Groundwater from this area was not suitable to be a source for direct drinking based on total hardness and total dissolved solids. The dominant cation is sodium, while the dominant anion is chloride. The calculations of saturation indices for the two sampling campaigns for different minerals showed negative values of (SI) for carbonates minerals (anhydrite, gypsum, sylvite, and halite). This suggests that the groundwater in the alluvial aquifer is undersaturated with respect to these minerals in most of the study area. This is indicative of the fact that these minerals are undergoing the process of dissolution. The mineral saturation indices suggest that the dominating hydrochemical processes were dissolutions of evaporite minerals (halite and gypsum), carbonate minerals (such as calcite, dolomite, and rhodochrosite), the manganese oxide minerals (such as jarosite-K, hausmannite, pyrochroite, and pyrolusite) and reverse ion exchange.

Topographic Position Index to Landform Classification and Spatial Planning, Using GIS, for Wadi Araba, South West Jordan

This study aimed to carry out a classification of landforms in Wadi Araba, southwest Jordan, using the topographic Position Index (TPI) by GIS. TPI was used at different spatial scales (mean, 50 m, 75 m, 100 m, 200 m, 500 m, 1000 m, 1500 m, and 2000 m) for such classification. Landform classification goes by ten levels: Valleys Bottoms, Midslope Drainage, Upland Drainages, Gentle Valleys, Plains, Open Slopes, Upper Slopes, Local Ridges, Midslope Ridges, and High Ridges. This requires defined classes using the TPI for all scales. The analysis showed that there were ten types of landforms; most of them were ridges, valleys, and steep slopes. In addition, the proportions of these types varied according to the variation of indicator values in the scale. Landform map according to the Neighborhood Values mean (m) showed that areas with upland drainages were about 14%, while areas with Gentle Valleys represented about 5.52%, of the total area of the study area. Finally, it was found possible to rely on the classification maps of the landforms for the purpose of spatial planning, as this included determining the land uses that are appropriate for each landform, as well as determining the levels of risk for landslides and floods.

Brief Synopses of New Arabic-Language Publications

Brief Synopses of New Arabic-Language Publications

Geospatial Analytics for Preliminarily Landscape Active Tectonic Assessment of the Wadi Araba Basin, Western Gulf of Suez, Egypt

The Gulf of Suez area represents one of the most famous tectonic structures in the Red Sea, with a long history of low-, moderate-, and high-intensity earthquakes. This paper provides geomorphic analytics of the fault-initiated mountain front sinuosity (Smf) and the stream gradients that cross various segments of the fault scarps. The results from the mountain front sinuosity index (Smf) and the valley floor width to valley height ratio index (Vf) suggest different levels of activities along the different fault segments. The analysis of the stream gradient index reflects that streams running through the fault segments mostly have higher river gradient values identified by knickpoint spots. With regard to the strike variation in the mountain front sinuosity, valley floor width to valley height ratio, and stream river gradients, the results are compatible with the predominant mountain front’s relief. Finally, the calculated geomorphic results show that the eastern segments might reflect higher seismic signals with respect to the central and western segments of the entire Wadi Araba basin. Thus, more careful studies are required to investigate seismic hazard possibilities.

Mapping cultural ecosystem services in the hyper arid environment of south of Jordan

Cultural ecosystem services (CESs) refer to the non-monetary benefits that nature provides humans. This study aimed to allocate and map the CESs in the hyper arid region at the southern part of Wadi Araba as a unique ecosystem in Jordan. 296 residents were participated in a structured questionnaire. The respondents were prompted to indicate CES by drawing dots on a geo-referenced landscape map corresponding to any areas they considered as CES. The results showed that (81.1%) of the locals practice hiking (71.3%) of locals practice walking, and (66.2%) of the locals visit sand dunes which are all among the most CESs the locals engage with. Moreover, respondents expressed that these activities are not related to their primary source of income. The results were mapped and subjected to hot-spot and statistical analyses using a geographical information system (GIS)-based spatial evaluation and statistical analysis using the kernel density estimation (KDE) and Getis-Ord Gi* statistics with inverse distance weight (IDW) interpolation. Overall, the CESs provided by their region were appreciated by most residents. The hot-spot analysis revealed that those core hot-spots (Getis-Ord-Gi* values equal to p = 0.01) covered 19.6% while core cold spots covered 21.2% of the study area. The respondents expressed eagerness to contribute to a constant flow of CESs if the restoration plans are fully supported by the local community. The CES maps generated using the data collected in the present study can serve as baseline measures of the CES provisions subject to change based on the parameters of each development scenario. Furthermore, these maps could help support current and future management efforts by integrating communities’ preferences into development and conservation initiatives, thereby ensuring more efficient and effective utilization of CESs.

Changing Attitudes Toward the West Bank in Jordan

Changing Attitudes Toward the West Bank in Jordan Michael Sharnoff (bio) A quarter of a century after King Hussein’s disengagement from the West Bank, and nearly two decades after the signature of the Wadi Arabah Peace Accord with Israel, Jordan’s western border has still not been fixed and the fate of the Palestinian refugees on the East Bank remains uncertain. —Tariq Mreyoud al-Tal1 This quote, expressed by Jordanian scholar Tariq Mreyoud al-Tal probably appears strange to most Westerners and perhaps even non-Jordanian Middle Easterners. Jordan’s boundaries in question refer to its relationship with the West Bank, a landlocked territory bordering Israel and Jordan and home to around 3 million Palestinian Arabs and half a million Israeli Jews. Jordan occupied this land during the 1948 war and subsequently annexed it in 1950. The West Bank became an integral part of Jordan until Israel conquered the land from Jordan during the 1967 war. Despite Israel’s occupation, Jordan continued to assert sovereignty claims on the West Bank until King Hussein severed all legal and administrative ties in 1988 in favor of the Palestine Liberation Organization (PLO). Today, Jordan, along with nearly the entire international community, regards the West Bank as an Israeli-occupied Palestinian territory. The official position of the Hashemite Kingdom supports ending Israeli rule of the West Bank and establishing an independent Palestinian state [End Page 44] there, along with the Gaza Strip and East Jerusalem as its capital. However, despite Jordan’s disengagement from the West Bank, the Hashemite monarchy’s stance obfuscates Jordan’s complex and historical, political, and legal relationship with this territory. Indeed, Jordan’s attitudes toward the West Bank have evolved, as explained by Adnan Abu-Odeh, former political advisor to both King Hussein and King Abdullah II, from an indivisible part of Jordan, to an occupied Jordanian land with Israel, to a territorial dispute with the PLO, and to an occupied Palestinian land.2 Jordan’s disengagement from the West Bank in 1988 and peace treaty with Israel in 1994 sought to affirm that Jordan is not Palestine, that Jordan would not become a substitute Palestinian homeland, and that the PLO was principally responsible to end the occupation and establish an independent state. This article aims to explain the changing attitudes toward the West Bank in Jordan from 1948 until the present. It will expand on Abu-Odeh’s remarks about the fluidity and evolving perceptions of Jordan’s attitude toward the West Bank and explain why some Jordanians espouse views toward the West Bank which challenge official Hashemite policy. In doing so, this article will demonstrate how Jordanian perceptions of the West Bank are influenced by Israeli and Palestinian politics and will assess how attitudes in opposition to official regime policy seek to defend the kingdom’s national security and protect the Palestinian people. Historical Context During World War I, the Allied Powers recognized Britain at the San Remo Conference in April 1920 to serve as the mandatory power in Palestine. The Allies endorsed the establishment of a Jewish national homeland in Palestine based on the Balfour Declaration of November 2, 1917, which would comprise land on both banks of the Jordan River. The League of Nations, the precursor to the United Nations, sanctioned the British Mandate of Palestine in 1922, which remained in effect until 1948. However, in 1921, Britain severed three-fourths of the original Mandate to Abdullah I, son of Hussein bin Ali, Emir of Mecca, based on agreements signed with London before the start of the Great Arab Revolt (1916–1918) against the Ottoman Turks. This new Arab entity became known as Transjordan and comprised territory east of the Jordan River. Transjordan, which gained semi-independence in 1923 and full independence from Britain in 1946, [End Page 45] consisted of vast territory with sparsely populated cities such as Irbid, Salt, Karak, and Ma’an. The ruling Hashemite dynasty governed over a quarter of a million Bedouin and non-Bedouin Muslim Arabs, settled Christian Arabs, and small numbers of Armenian Christians, Druze Arabs, Muslim Circassians, and Muslim Chechens.3 Abdullah I had grand territorial ambitions that Transjordan alone could not satisfy. Coveting a...

Gendered Perceptions for Identifying Ecosystem Services in the Arid Ecosystem of Wadi Araba in Jordan

This study aimed to explore how ecosystem services (ES) identification varies among the local communities based on gender perceptions, considering the differences in usage and access to natural resources. We conducted research through two methods; focus groups and personal interviews. Four focus groups were formed in four communities in Wadi Araba (WA), Southern Jordan. A structured face-to-face interview method was used to evaluate a random sample of 200 residents. A binary logistic analysis was conducted to explore how the respondent's gender is seen to influence the type and use of services, and their perceptions of services in an arid ecosystem. The analysis generated three models; the first model showed that women were able to recognize and use provisioning services related to livestock production as they use rangeland for grazing for long periods and long daily hours, and the second model results reflected those women were able to recognize few ES. The identified services were linked to income-generating activities for a long time. The third model indicated that men were more likely to recognize and indicate the establishment of government services in support of the region as a result of the thriving and developed tourism sector.

Qualitative and quantitative analyses of the Carboniferous ostracod genus Carbonita from Rod El-Hamal area, Wadi Araba, north Eastern Desert, Egypt

ABSTRACT The present work provides a qualitative analysis of the studied ostracod carapaces of the genus Carbonita. Thirty-seven ostracod specimens were collected from the Late Carboniferous Rod El-Hamal Formation at Rod El-Hamal area, Wadi Araba, north Eastern Desert, Egypt. The collected ostracods were assigned to four species in genus Carbonita; C. fabulina (Jones and Kirkby), C. inflata (Jones and Kirkby), C. humilis (Jones and Kirkby), and C. bairdoides (Jones and Kirkby) according to the qualitative traits. In order to assess the discrimination among the different Carbonita species, a new technique, geometric morphometric analyses, was carried out using ImageJ and MorphoJ software packages. Geometric morphometric analyses included landmark configurations, procrustes superimposition, principle component analysis, and thin plate spline deformation plots. Using nine landmarks, average shapes of the different Carbonita species have been provided. The principle component analysis separated Carbonita fabulina and C. bairdoides from the morphologically overlapped C. inflata and C. humilis. Shape variations in the carapace length, height, anteroventral arc, posterodorsal arc, posteroventral arc, and the anterior margin were demonstrated through the deformation plots. These quantitative analyses, along with the qualitative examination, provided considerable variations among the different Carbonita species, and hence the best way for species discrimination.

Five-Year Monitoring of a Desert Burrow-Dwelling Spider Following an Environmental Disaster Indicates Long-Term Impacts.

Simple SummaryDeserts are characterized by unpredictable precipitation, extreme temperatures, and plants and animals that are specialized to live in these habitats. Consequently, desert organisms often recover slowly, if at all, from human-induced environmental disasters. We studied the effects of two nearby oil spills from a broken pipeline, one that occurred in 1975 and another recent one in 2014, on a burrow-dwelling spider in the extreme desert of the ‘Arava valley (Israel). We compared the abundance of spider burrows in plots contaminated by the oil with nearby unaffected plots over a 4-year period. The abundance was significantly lower in plots with oil-contaminated soil, both in the recent (2014) oil spill area and in the area affected by the 1975 spill. In the laboratory, we found that when offered oil-contaminated versus clean desert soil substrates, spiders chose the clean soil substrate. We conclude that the populations of this burrow-dwelling spider were affected negatively by the oil spills and, furthermore, showed long-lasting impacts from a 40-year-old spill. We propose that burrow-dwelling spiders can be used as effective bioindicators of persistent soil pollution in desert habitats.Deserts are characterized by unpredictable precipitation and extreme temperatures. Their fauna and flora are sensitive to anthropogenic environmental changes, and often recover slowly from environmental disasters. The effects of oil spills on the biota of desert regions, however, have scarcely been studied. We predicted that terrestrial invertebrates suffer long-term negative effects from an oil spill, due to their close association with the substrate. Thus, we investigated the effects of two oil spills that occurred in 1975 and 2014 in the hyper-arid ‘Arava desert (Israel), on a spider that constructs silk-lined nests in burrows in compact, sandy soil in this extreme desert habitat. The spider, Sahastata aravaensis sp. nov. (Filistatidae), is described herein. We assessed spider burrow abundance in plots located in oil-contaminated and nearby uncontaminated clean soil (control) areas over five consecutive years and measured habitat characteristics in these plots. In the laboratory, we determined the preference of individuals for clean vs. oil-contaminated soil as a resting substrate. Finally, as this species was previously undescribed, we added a new species description. The abundance of Sahastata was significantly lower in oil-contaminated plots, and this was the case in the 40-year-old oil spill (1975) as well as in the recent one (2014). In laboratory tests, spiders showed a significant preference for the clean soil substrate over the oil-contaminated substrate. In the field, soil crust hardness and vegetation density did not differ significantly between oil-contaminated and control plots, but these measures were highly variable. The burrows were significantly clustered, suggesting that the young disperse only short distances. In the laboratory adult spiders did not dig burrows, perhaps indicating that adults remain permanently in their natal burrows and that in the field they may use vacant burrows. We conclude that Sahastata populations were affected negatively by the oil spills and these effects were long-lasting. We propose that by monitoring their spatial distribution, burrow-dwelling spiders such as Sahastata can be used as effective bioindicators of soil pollution in desert habitats.

THE USE OF GIS FOR MANAGED AQUIFER RECHARGE (MAR) SITE SELECTION IN WADI ARABA - JORDAN

Ponte Academic JournalJul 2022, Volume 78, Issue 7 THE USE OF GIS FOR MANAGED AQUIFER RECHARGE (MAR) SITE SELECTION IN WADI ARABA - JORDANAuthor(s): Ala' Hamed Alelaimat ,Ismail Yusoff, Tham Fatt Ng, Yahya A Majali, Mohd Khairul Nizar ShamsuddinJ. Ponte - Jul 2022 - Volume 78 - Issue 7 doi: 10.21506/j.ponte.2022.7.8 Abstract:Jordan is considered as one of the ten most waterscarce countries in the world, but the country facing challenges in its water sector, Groundwater is the most important source of water in Jordan, it provides more than half of the total water demand, Some of Jordan groundwater resources are presently exploited at maximum capacity and in some cases more than safe yield. To meet this challenge, we should search for practical solutions that increase groundwater recharge, naturally or artificially. This study aims to select suitable sites for Managed Aquifer Recharge (MAR) through GIS techniques, the selected criteria choosing based on Rainfall, Slope, Geological formations, Land Use, Soil texture and Depth to water table, and assigned weightages and ranks, these layers have been integrated into GIS software for generating MAR suitability map of Wadi Araba. The area falls into five categories of (MAR) potential zones i.e., very good, good, moderate, low, and very low depending on the likelihood of (MAR) suitable locations. Based on this study, it is found that 16.7% with an area of 1473.7 km2 and 30.15% with 2649.5 km2 area are under the very good and good category of (MAR) suitability respectively. An area of 1779.3 km2 represents 20.24% is found under the moderate category whereas 1944.24 km2 and 890.94 km2 equals 32.82% of Wadi Araba area falls under the low and very low category of (MAR) suitability respectively. Download full text:Check if you have access through your login credentials or your institution Username Password

The End of Arabah Copper Production and the Destruction of Gath: A Critique and an Alternative Interpretation

ABSTRACT Recent research has proposed that the Philistine city of Tell es-Safi/Gath was centrally involved in the copper trade from Faynan and Timna in the Wadi Arabah, and that the end of Arabah copper production in the second half of the 9th century bce should be attributed to the destruction of Tell es-Safi/Gath by Hazael, after which Cyprus replaced the Arabah as the major source for Levantine copper. This paper argues that the assumptions underlying this interpretation are not supported by the evidence. Gaza, not Tell es-Safi/Gath, was the main terminus for the Arabah copper trade; the termination of copper production in the Arabah was not an abrupt end caused by external intervention, but the result of a long process of decrease in administrative control and abandonment of copper production sites from the early 9th century bce; Hazael’s motivation in destroying Tell es-Safi/Gath was more likely owing to its size and dominance of the region, and its economic power through olive oil production; Cypriot copper production had already intensified in the late 10th and first half of the 9th centuries bce, while Arabah copper production was still at its peak. An alternative and more complex explanation for the end of copper production in the Arabah emerges from this re-evaluation. The Arabah industry may have lacked the leadership and administrative infrastructure to compete with the renewed Cypriot trade. It continued to produce copper and probably traded it to established markets, but finally petered out by the end of the 9th century bce.

Late Moscovian phylloid algal-microbial mounds from Wadi Araba, north Eastern Desert, Egypt: a new construction model and paleogeographic distribution

Late Moscovian phylloid algal-microbial mounds from Wadi Araba, north Eastern Desert, Egypt: a new construction model and paleogeographic distribution

Hydrochemistry and environmental isotopes of spring water and their relation to structure and lithology identified with remote sensing methods in Wadi Araba, Egypt

Springs located at the historical sites of Wadi Araba (Eastern Desert of Egypt) and emerging from the escarpments of the Northern and Southern Galala Plateaus were investigated. A combination of methods, including hydrochemistry, stable and radioisotope composition, and structural analyses based on satellite data, provided information about the structure of the subsurface and the derived groundwater flow paths. Satellite images reveal karst features within the northern plateau, e.g. conical landforms. Karstic caves were documented along both escarpments. Chemical analysis of floodwater from Wadi Araba indicates higher concentrations of terrestrial salts compared to floodwaters from central and southern parts of the desert. δ18O and δ2H signatures in spring waters resemble those of floodwater and fall on the global meteoric water line, confirming their fast infiltration with minor influence of evaporation. The aquifer feeding the springs of the Northern Galala Plateau has low retention and the springs dry out quickly, even after heavy rainfall. Contrastingly, 3H activities in springs emerging from the Southern Galala Plateau refer to much slower subsurface passage. With respect to 3H content (3.8 TU) in recent flood waters, the spring water at Southern Galala Plateau contains about 40% recently recharged groundwater. However, its largest spring—the St. Antony spring—discharges water with a radiocarbon age of about 15,000 years. In combination with this spring’s constant and high discharge over a period of several months, that age estimate suggests a large reservoir with moderate to high retention.