The character and origin of sequence architecture in the arid climate zone: A case of the Lower Submember of the Fourth Member of Shahejie Formation in the Bonan Sub-Sag

By using the data of drilling and logging and other materials, the contour graph of the thickness of the remnant strata can be worked out. After the compaction restoration of the graph, the original sedimentary thickness of the First Member of Kongdian Formation(Ek1) and the Lower Part of the Fourth Member of Shahejie Formation ( lower Es4) can be obtained and their palaeogeomorphology can be reconstructed. The research results show that palaeogeomorphology has an obvious control on the sedimentary systems of Ek1 and lower Es4. In the areas with higher mountains and steeper slopes in the northern basin, there mainly develop nearshore subaqueous fans while in the south of the basin, there mostly develop alluvial fans.

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Chemical composition of utility water in the arid climate zone on the examples of Kébili and Medenine regions (southern Tunisia)

Prace Geograficzne ◽

10.4467/20833113pg.18.017.9540 ◽

2018 ◽

Vol 155 ◽

pp. 139-156 ◽

Cited By ~ 2

Author(s):

Beata Latos ◽

◽

Karolina Sobczak-Szelc ◽

Krzysztof Skocki ◽

Rafał Kozłowski ◽

...

Keyword(s):

Chemical Composition ◽

Arid Climate ◽

Climate Zone ◽

Southern Tunisia

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A Novel Redox Indicator based on Relative Abundances of C31 And C32 Homohopanes in the Eocene Lacustrine Dongying Depression, East China

10.21203/rs.3.rs-396664/v1 ◽

2021 ◽

Author(s):

Chong Jiang ◽

Haiping Huang ◽

Zheng Li ◽

Hong Zhang ◽

Zheng Zhai

Keyword(s):

Vitrinite Reflectance ◽

Source Rocks ◽

East China ◽

Peak Oil ◽

Dongying Depression ◽

Anoxic Environments ◽

Oil Generation ◽

Shahejie Formation ◽

The Impact ◽

Fourth Member

Abstract A suite of oils and bitumens from the Eocene Shahejie Formation (Es) in the Dongying Depression, East China was geochemically characterized to illustrate the impact of source input and redox conditions on the distributions of pentacyclic terpanes. The fourth member (Es4) developed under highly reducing, sulfidic hypersaline conditions, while the third member (Es3) formed under dysoxic, brackish to freshwater conditions. Oils derived from Es4 are enriched in C32 homohopanes (C32H), while those from Es3 are prominently enriched in C31 homohopanes (C31H). The C32H/C31H ratio shows positive correlation with homohopane index (HHI), gammacerane index (G/C30H), and negative correlation with pristane/phytane (Pr/Ph) ratio, and can be used to evaluate oxic/anoxic conditions during deposition and diagenesis. High C32H/C31H ratio (> 0.8) is an important characteristic of oils derived from sulfidic, hypersaline anoxic environments, while low values (< 0.8) indicate non-sulfidic, dysoxic conditions. Extremely low C32H/C31H ratios (< 0.4) indicate strong oxic conditions of coal depsoition. Advantages to use C32H/C31H ratio as redox condition proxy compared to the HHI and gammacerane indexes are wider valid maturity range, less sensitive to biodegradation influence and better differentiation of reducing from oxic environments. Preferential cracking of C35-homohopanes leads HHI to be valid in a narrow maturity range before peak oil generation. No C35 homohopane can be reliably detected in the Es4 bitumens when vitrinite reflectance is > 0.75%, which explains the rare occurrence of high HHI values in Es4 source rocks. Gammacerane is thermally more stable and biologically more refractory than C30 hopane, leading G/C30H ratio more sensitive to maturation and biodegradation than C32H/C31H ratio. Meanwhile, both HHI and gammacerane index cannot differentiate level of oxidation. The C32H/C31H ratio can be applied globally as a novel redox proxy in addition to the Dongying Depression.

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Domestic Wastewater Treatment and Lipid Accumulation for Biodiesel Production by an Isolated Heterotrophic Microalgae from an Arid Climate Zone

The Asia Journal of Applied Microbiology ◽

10.18488/journal.33.2019.61.1.9 ◽

2019 ◽

Vol 6 (1) ◽

pp. 1-9 ◽

Cited By ~ 1

Author(s):

Abdelghani El Asli ◽

Nadia El Mesbahi ◽

Rachida Oubakalla ◽

Loubna El Fels ◽

Mohamed Hafidi ◽

...

Keyword(s):

Wastewater Treatment ◽

Lipid Accumulation ◽

Domestic Wastewater ◽

Biodiesel Production ◽

Arid Climate ◽

Climate Zone ◽

Heterotrophic Microalgae ◽

Domestic Wastewater Treatment

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Exploring the impact of balconies on cooling energy demand in an arid climate zone

Selected Scientific Papers - Journal of Civil Engineering ◽

10.2478/sspjce-2021-0014 ◽

2021 ◽

Vol 16 (2) ◽

pp. 25-35

Author(s):

Soufiane Boukarta

Keyword(s):

Energy Demand ◽

Parametric Method ◽

Arid Climate ◽

Climate Zone ◽

Final Sample ◽

Thermal Simulations ◽

The Impact ◽

The City ◽

Cooling Energy Demand ◽

Generalized Regression Model

Abstract This paper explores the impact of balconies on the energy demand required for cooling in the arid climate zone of the city of Adrar, in Algeria. For the purpose to assess several situations of the balconies, we have chosen a parametric method based on a campaign of thermal simulations. The open and eliminated balcony type were selected and characterized by four parameters: the balcony to room ratio, the orientation, the window type, and the balcony position. A set of 100 simulations was selected randomly based on the Monte-Carlo probability technique. The final sample was corrected based on Cook’s distance which gave 85 simulations as a final sample size. A generalized regression model was performed to identify the impact of each parameter. The accuracy of the model is above 97% and the sensitivity analysis shows that the most important factor is the balcony to room ratio which could reduce the energy demand up to 26% followed by the window type (24%), the orientation (8%) and the balcony position (5%). This conclusion stresses the idea of considering the balcony as a passive solution to reduce the cooling energy demand.

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