Physics and Chemistry of the Earth最新文献_第10页

How to decipher the environmental resilience performance? A case study of Yangtze River Delta Urban Agglomeration 如何解读环境复原力绩效？长三角城市群案例研究

IF 3 3区地球科学

Physics and Chemistry of the Earth Pub Date : 2024-09-06 DOI: 10.1016/j.pce.2024.103725

Han Hu , Kegao Yan , Houbao Fan , Tiangui Lv , Xinmin Zhang

{"title":"How to decipher the environmental resilience performance? A case study of Yangtze River Delta Urban Agglomeration","authors":"Han Hu , Kegao Yan , Houbao Fan , Tiangui Lv , Xinmin Zhang","doi":"10.1016/j.pce.2024.103725","DOIUrl":"10.1016/j.pce.2024.103725","url":null,"abstract":"<div><p>Improving environmental resilience performance (ERP) is a significant support for achieving sustainable development goals. This study introduces the three-dimensional analysis framework of \"object-process-actor\", capable of addressing multidimensional and multilevel issues. This framework systematically addresses the \"three key questions\" of what, how, and who to improve ERP. Results indicate that from 2011 to 2020, the ERP of the Yangtze River Delta Urban Agglomeration (YRDUA) was between 0.42 and 3.30. The violin plot and visualization analysis showed that its probability density and distribution status were stable, with significant regional differences. The ERP of economically developed cities such as Hangzhou and Shanghai is high, while the ERP of cities in the Yancheng-Chuzhou line is low, and the number of high-performing cities increases to 40.7% in 2020, which is a constantly improving development trend. Factors related to market actors have the greatest impact on ERP, with the explanatory power of <span>FDI</span>, green invention patents, and population concentration all exceeding 0.6, and the importance of government and social actors is also supported. The explanatory power of factor interactions was stronger than that of single factors, and land development degree ranked third in terms of its interaction power with other factors and was also a key factor influencing ERP. These findings provide new explanations and knowledge for improving ERP, which can provide references for policymakers and urban planners.</p></div>","PeriodicalId":54616,"journal":{"name":"Physics and Chemistry of the Earth","volume":"136 ","pages":"Article 103725"},"PeriodicalIF":3.0,"publicationDate":"2024-09-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142168413","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Exploring the impact of population urbanization on the green economy development: A case study of 30 provincial-level administrative regions in China 探索人口城镇化对绿色经济发展的影响：中国 30 个省级行政区的案例研究

IF 3 3区地球科学

Physics and Chemistry of the Earth Pub Date : 2024-09-06 DOI: 10.1016/j.pce.2024.103727

Ziheng Shangguan

{"title":"Exploring the impact of population urbanization on the green economy development: A case study of 30 provincial-level administrative regions in China","authors":"Ziheng Shangguan","doi":"10.1016/j.pce.2024.103727","DOIUrl":"10.1016/j.pce.2024.103727","url":null,"abstract":"<div><p>The green economy development (GED) has emerged as a paramount objective for urban progress in the 21st century, emphasizing the harmonious advancement across economic, social, and environmental domains. Yet, the impact of population urbanization, a pivotal driver of urban evolution, on GED remains ambiguous. Addressing this knowledge gap necessitates investigations at specific stages of rapid population urbanization in a certain country. In order to explore the relationship between them, this study focuses on China, a distinctive economic entity, utilizing the DEA-SBM model with unexpected outputs to assess its GED efficiency (GE). Additionally, employing the Tobit model, the study scrutinizes the impact of population urbanization on GE in China from 2000 to 2020. Mechanism analyses are further conducted to explore the key roles of environmental policies, population density, and R&D in fostering GE. Findings reveal: (1) a U-shaped relationship between population urbanization and GE; (2) significant enhancement of GE through green credit policy, alongside positive moderating the impact of environmental protection on GE; conversely, environmental assessment policy notably reduce GE, while positively moderating the impact of industrial structure rationalization on GE; (3) a U-shaped relationship between population urbanization and GE under low population density, with population urbanization significantly diminishing GE as population density reaches a critical level; (4) higher amount of R&D personnel corresponding to increased GE at equivalent population urbanization levels. Finally, several management strategies derived from these findings are offered, aiming to assist other developing nations in effectively improving their urban GE.</p></div>","PeriodicalId":54616,"journal":{"name":"Physics and Chemistry of the Earth","volume":"136 ","pages":"Article 103727"},"PeriodicalIF":3.0,"publicationDate":"2024-09-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S1474706524001852/pdfft?md5=03651d667f9c44128f2c4521d0d93ee3&pid=1-s2.0-S1474706524001852-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142162595","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Evaluating the influencing factors of groundwater evolution in rapidly urbanizing areas using long-term evidence 利用长期证据评估快速城市化地区地下水演变的影响因素

IF 3 3区地球科学

Physics and Chemistry of the Earth Pub Date : 2024-09-06 DOI: 10.1016/j.pce.2024.103728

Feng-jie Li , Yang Liu , Nusrat Nazir , Ramamoorthy Ayyamperumal

{"title":"Evaluating the influencing factors of groundwater evolution in rapidly urbanizing areas using long-term evidence","authors":"Feng-jie Li , Yang Liu , Nusrat Nazir , Ramamoorthy Ayyamperumal","doi":"10.1016/j.pce.2024.103728","DOIUrl":"10.1016/j.pce.2024.103728","url":null,"abstract":"<div><p>Groundwater ionic components evolution can simultaneously characterize the process of natural environment and anthropogenic activities on groundwater. In order to reveal the long-term evolution mechanism and influencing factors of urban groundwater in the context of rapid urbanization and industrialization. Studies carried out in Lanzhou, a region in Northwest China known for interconnection of anthropogenic activities and groundwater systems, sought to explore the mechanisms influencing the evolution of groundwater ionic components within the last 20 years. Hydrochemical analysis methods and integrated groundwater ion source analysis methods were utilized to isolate natural and anthropogenic factors in the evolution of groundwater ions, and subsequently combined with LULC to analyze the correlation between the type and intensity of land changes on groundwater ion components. The results show that, the ionic composition of groundwater was dominated by ion exchange and mineral weathering, river recharge, industrial activities, urban activities, and agricultural activities in 26%, 10%, 23%, 25%, and 16% of the sample sites respectively in 2002. However, in 2022, the proportion of sites dominated by these five categories is 20%, 18%, 12%, 40%, and 10%, respectively. Further combining the yearly trends in LULC, it is concluded that the decrease of cultivated land area and the significant increase of urban construction land in Lanzhou are closely related to the groundwater evolution process in Lanzhou in the past 20 years. Today's agricultural activities no longer dominate the ionic fraction of groundwater in Lanzhou, but increased population density and urban sewage discharge due to rapid and intensive urbanization are the main factors influencing the ionic fraction of groundwater.</p></div>","PeriodicalId":54616,"journal":{"name":"Physics and Chemistry of the Earth","volume":"136 ","pages":"Article 103728"},"PeriodicalIF":3.0,"publicationDate":"2024-09-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S1474706524001864/pdfft?md5=01077ac2f29d8f78fe4cb326b6a3d8e0&pid=1-s2.0-S1474706524001864-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142162596","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Implementation of stack-based ensemble technique for classification of glaciers in the western Himalayan catchments 在喜马拉雅山西部集水区冰川分类中采用基于堆栈的集合技术

IF 3 3区地球科学

Physics and Chemistry of the Earth Pub Date : 2024-09-05 DOI: 10.1016/j.pce.2024.103723

Vikrant Shishodia , Vishal Singh , Santosh Gopalkrishnan Thampi

{"title":"Implementation of stack-based ensemble technique for classification of glaciers in the western Himalayan catchments","authors":"Vikrant Shishodia , Vishal Singh , Santosh Gopalkrishnan Thampi","doi":"10.1016/j.pce.2024.103723","DOIUrl":"10.1016/j.pce.2024.103723","url":null,"abstract":"<div><div>Human activities and climate change are causing Himalayan glaciers to melt erratically and affect runoff patterns, highlighting the need to monitor this vital resource. Imaging debris-covered glaciers is difficult because of the spectral similarity with non-glacier areas within various bands. This study assessed changes in the glacial area with regard to the year 1989 and mapped the area of glaciers in the Satluj River watershed from 2015 to 2019.The entire band range of Landsat imageries (1989–2019) was used to create glacial maps of each year, including glacier classes namely clean ice glaciers (CI), debris glaciers (DG), dirty ice + debris mix (DI + DM), glaciers and periglacial debris (PD), water, and rocks. The layers developed using traditional indices such as the NDSI, NDGI and unsupervised classification methods like K-means and Isodata. AI-powered technologies streamlined the process of mapping glacier borders and accurately assessed changes in glacial area. This work employs traditional machine learning techniques such as Random Forest (RF), Logistic Regression (LR), Support Vector Machine (SVM), Multi-layer Perceptron (MLP), and XGBoost (XGB), as well as a stack-based ensemble hybrid model. The six categorization systems' glacier class areas varied greatly, with accuracy ranging from 72.74% to 94.09%. The stack-based ensemble technique outperformed the other classification algorithms in this investigation. The transition from clean ice to dirty ice and eventually to a debris-covered glacier can also be observed in the basin. Overall, about 40–50% change (reduction) in the glacier area has been noticed.</div></div>","PeriodicalId":54616,"journal":{"name":"Physics and Chemistry of the Earth","volume":"136 ","pages":"Article 103723"},"PeriodicalIF":3.0,"publicationDate":"2024-09-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142315431","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Application of some nanomaterials on pollutant removal in the porous asphalt 应用纳米材料去除多孔沥青中的污染物

IF 3 3区地球科学

Physics and Chemistry of the Earth Pub Date : 2024-09-05 DOI: 10.1016/j.pce.2024.103724

Ramtin Sobhkhiz Foumani , Taher Rajaee , Esmaeil Fatehifar

{"title":"Application of some nanomaterials on pollutant removal in the porous asphalt","authors":"Ramtin Sobhkhiz Foumani , Taher Rajaee , Esmaeil Fatehifar","doi":"10.1016/j.pce.2024.103724","DOIUrl":"10.1016/j.pce.2024.103724","url":null,"abstract":"<div><div>This research has been aimed to experimentally and numerically examine the effect of nanomaterials on pollutant removal in the porous asphalt in urban surface runoff. For this purpose, 19 samples including Titanium dioxide (TiO<sub>2</sub>), Graphene Oxide (GO), Zinc Oxide (ZnO), and Copper Oxide (CuO) were applied to reduce pollution in surface runoff. Numerical models were simulated using laboratory data in COMSOL software, and the results of these methods were compared with the laboratory results. With a slight difference, the numerical and experimental results indicated the positive effect of adding ZnO and GO and the negative effect of adding CuO and TiO<sub>2</sub> to the porous asphalt in reducing the Sulfate (SO₄), Nitrate (NO<sub>3</sub>), Total Suspended Solids (TSS), and Total Dissolved Solids (TDS) parameters in the polluted water outflow. Also, obtained results showed adding these Nano Particles (NPs) to the porous asphalt at concentrations of 6% and 8% had a beneficial effect and that adding NPs at concentrations of 2% had no effect in reducing the Lead (Pb) parameter dissolved in the polluted water outflow. Overall, the results indicated the positive effect of the ZnO-containing asphalt sample in absorbing and reducing all parameters of pollutants dissolved in the polluted water. The CuO-containing asphalt sample was also discovered to have produced opposite results or have nearly no effect on various parameters, increasing the amounts of pollutants in water outflow. In addition, the asphalt samples containing GO and TiO<sub>2</sub> also positively contributed to reducing certain pollution parameters.</div></div>","PeriodicalId":54616,"journal":{"name":"Physics and Chemistry of the Earth","volume":"136 ","pages":"Article 103724"},"PeriodicalIF":3.0,"publicationDate":"2024-09-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142423193","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Evaluation of water quality fluctuation in the tidal reach under the impact of on shore wastewater discharges based on MIKE 21 model in dongguan, China 基于 MIKE 21 模型的中国东莞沿海污水排放影响下的潮间带水质波动评价

IF 3 3区地球科学

Physics and Chemistry of the Earth Pub Date : 2024-09-05 DOI: 10.1016/j.pce.2024.103730

Changzheng Wu , Jinquan Wan , Yishu Wang , Zhangqing Bi , Yan Wang , Xiuwen Ren

{"title":"Evaluation of water quality fluctuation in the tidal reach under the impact of on shore wastewater discharges based on MIKE 21 model in dongguan, China","authors":"Changzheng Wu , Jinquan Wan , Yishu Wang , Zhangqing Bi , Yan Wang , Xiuwen Ren","doi":"10.1016/j.pce.2024.103730","DOIUrl":"10.1016/j.pce.2024.103730","url":null,"abstract":"<div><div>The text discusses the study of water quality simulation in the lower reaches of the Dongjiang River basin—tidal river section. Utilizing MIKE 21 software, an integrated 2D hydrodynamic-water quality coupled mathematical model was constructed for the lower reaches and estuary area of the Dongjiang River. The model simulated the hydrodynamic characteristics near the wastewater outlet and the impact of pollutant discharge on the water quality in the study area. The simulation results indicate: (1) During wet and dry seasons, the overall flow pattern remains consistent, with the ebb current velocity slightly greater than the flood tide current velocity beside the outlet. The flow velocity is generally greater during wet season compared to dry season. Interestingly, the flow direction during flood and ebb tides is completely opposite and tides have a great impact on the maximum flow velocity in Xialu Connecting channel. (2) Under normal discharge conditions, the increment of COD, NH<sub>3</sub>-N, and TP in most areas of Zhongtang Waterway, Daoyun Waterway, and Hengchong Waterway is less than 5 mg/L, 0.1 mg/L, and 0.02 mg/L, respectively, indicating a minor impact on water quality; While in the event of an accidental discharge, the concentration increment is in the range of 5–30 mg/L, 0.1–0.25 mg/L, and 0.02–0.05 mg/L, respectively. COD causes the most significant water quality changes and will severely impact the water environment of the Dongjiang River basin. Furthermore, pollutant dispersion is more extensive during dry seasons due to reduced river flow and weaker dilution capacity. (3) Overall, the results underscore the critical importance of accounting for both tidal and seasonal dynamics in simulation of estuarine water quality.</div></div>","PeriodicalId":54616,"journal":{"name":"Physics and Chemistry of the Earth","volume":"136 ","pages":"Article 103730"},"PeriodicalIF":3.0,"publicationDate":"2024-09-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142319809","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Effective removal of different dyes using run-of-mine and processed coal samples 使用原煤和加工煤样有效去除不同染料

IF 3 3区地球科学

Physics and Chemistry of the Earth Pub Date : 2024-09-02 DOI: 10.1016/j.pce.2024.103720

Smruti Smita Sahoo, Gagan Mangaraj

{"title":"Effective removal of different dyes using run-of-mine and processed coal samples","authors":"Smruti Smita Sahoo, Gagan Mangaraj","doi":"10.1016/j.pce.2024.103720","DOIUrl":"10.1016/j.pce.2024.103720","url":null,"abstract":"<div><p>Coal, traditionally utilised solely for combustion, is now being investigated for its potential as an adsorbent in purifying drinking water by eliminating hazardous metal ions. Limited research exists regarding its effectiveness in reducing organic dye levels. Presented here are the outcomes of an extensive investigation into various carbon samples' efficacy as adsorbents for wastewater color removal. Samples of coal sourced from Western Coalfield Limited (WCL) were meticulously processed and characterized, encompassing run-of-mine coal and acid-leached coal. A comprehensive array of techniques, including scanning electron microscopy (SEM) coupled with energy dispersive X-ray spectroscopy (EDX), powder X-ray diffraction (PXRD), Fourier transform infrared spectroscopy (FTIR), and Raman spectroscopy, was employed for coal characterization. Proximate analysis and gross calorific value (GCV) were employed to assess coal's physical attributes. The adsorption behavior of methylene blue (MB) and crystal violet (CV) on coal was scrutinized, varying factors such as contact time, pH, initial MB and CV concentrations, and adsorbent doses. Optimal adsorption parameters for MB were determined as pH 2, initial concentration of 1 ppm, 0.2 g adsorbent dose, and 60 min contact time. For CV, optimal conditions were pH 8, initial concentration of 6 ppm, 0.4 g adsorbent dose, and 45 min contact time. MB adsorption kinetics favored the pseudo-second-order reaction model, with Freundlich isotherms providing a better fit than Langmuir isotherms. Conversely, CV adsorption kinetics favored the pseudo-second-order reaction model, with Langmuir isotherms exhibiting a superior fit compared to Freundlich isotherms.</p></div>","PeriodicalId":54616,"journal":{"name":"Physics and Chemistry of the Earth","volume":"136 ","pages":"Article 103720"},"PeriodicalIF":3.0,"publicationDate":"2024-09-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142151708","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Experimental study on the influence of extremely broken surrounding rock grade on the mechanical characteristics of tunnels 极破碎围岩等级对隧道力学特性影响的试验研究

IF 3 3区地球科学

Physics and Chemistry of the Earth Pub Date : 2024-08-30 DOI: 10.1016/j.pce.2024.103718

Yongbin Xie , Xuguang Dong , Xiaoyu Yang , Wangwang Fu , Xin Wang

{"title":"Experimental study on the influence of extremely broken surrounding rock grade on the mechanical characteristics of tunnels","authors":"Yongbin Xie , Xuguang Dong , Xiaoyu Yang , Wangwang Fu , Xin Wang","doi":"10.1016/j.pce.2024.103718","DOIUrl":"10.1016/j.pce.2024.103718","url":null,"abstract":"<div><p>To study the significant deformation and distortion issues in certain sections of the Qinyu tunnel extremely fragmented surrounding rock under identical conditions, six tunnel sections with the same depth of burial and lithology were selected for on-site monitoring of stress. The experimental data were then used to explore the impact of gradation on the mechanical characteristics of the extremely fragmented surrounding rock tunnels. The results indicate that the tunnel experiences larger stresses at the crown and smaller stresses at the side walls and invert, showing the influence of gradation on the stress behavior of extremely fractured surrounding rock. A dual-fractal structure model was employed to quantitatively describe the gradation of the surrounding rock, yielding fitting coefficients above 0.9. The model demonstrated good applicability for extremely fractured rock with significant particle size differences. Additionally, the relationship between fractal model parameters and the maximum rock pressure at various tunnel sections was discussed, revealing an exponential correlation between the absolute difference in fractal dimensions of coarse and fine particles and the maximum rock pressure. To further understand the factors and the influence of gradation on tunnel rock pressure, indoor model tests were conducted using six different gradations. The experimental results once again confirmed the importance of gradation on the stress behavior of highly fragmented rock tunnels and validated the functional relationship between the absolute difference in fractal dimensions and rock pressure. The results can provide guidance for the design of tunnels with extremely fractured surrounding rocks in the future.</p></div>","PeriodicalId":54616,"journal":{"name":"Physics and Chemistry of the Earth","volume":"136 ","pages":"Article 103718"},"PeriodicalIF":3.0,"publicationDate":"2024-08-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142121988","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Impacts of land use changes on the spatiotemporal evolution of groundwater quality in the yinchuan area, China, based on long-term monitoring data 基于长期监测数据的土地利用变化对中国银川地区地下水水质时空演变的影响

IF 3 3区地球科学

Physics and Chemistry of the Earth Pub Date : 2024-08-30 DOI: 10.1016/j.pce.2024.103722

Jing Ning , Peiyue Li , Xiaodong He , Xiaofei Ren , Fan Li

{"title":"Impacts of land use changes on the spatiotemporal evolution of groundwater quality in the yinchuan area, China, based on long-term monitoring data","authors":"Jing Ning , Peiyue Li , Xiaodong He , Xiaofei Ren , Fan Li","doi":"10.1016/j.pce.2024.103722","DOIUrl":"10.1016/j.pce.2024.103722","url":null,"abstract":"<div><p>Agricultural activities and rapid urbanization have significantly impacted groundwater quality, especially in semi-arid and arid regions. This study comprehensively evaluated the quality of phreatic and confined groundwater in the Yinchuan area, China, using long-term monitoring data from 1991 to 2018. Geospatial analysis model was employed to explore the spatiotemporal evolution of groundwater hydrochemistry. The effects of land use changes on groundwater quality were assessed using correlation analysis and a multiple linear regression model (MLR). The findings indicate significant temporal variations in groundwater quality, with phreatic water consistently exhibiting high salinity and hardness. The groundwater quality for phreatic water was frequently more polluted than confined water. From 1991 to 2018, the hydrochemical composition of phreatic water evolved from HCO<sub>3</sub>-Mg and HCO<sub>3</sub>·SO<sub>4</sub>-Mg to more complex forms such as HCO<sub>3</sub>·SO<sub>4</sub>·Cl-Mg and HCO<sub>3</sub>·Cl-Mg. In contrast, confined water predominantly maintained its HCO<sub>3</sub>-Mg type and HCO<sub>3</sub>·Cl-Na (Na·Mg) type. Urban land had rapidly expanded in the past three decades, increasing by 318.75% compared to 1991. The water body and urban area diminished the quality of phreatic water. High salt water in lakes and drainage ditches, combined with poor runoff conditions and intensive evaporation, caused the increase of TDS, Cl<sup>−</sup>, SO<sub>4</sub><sup>2−</sup>, Mn, TH, NO<sub>3</sub><sup>−</sup>, F<sup>−</sup>, and Fe in phreatic water. NO<sub>3</sub><sup>−</sup>, NH<sub>4</sub><sup>+</sup>, and F<sup>−</sup> in phreatic water could be impacted by human and industrial activity in urban areas. This study provides valuable insights for local decision-makers to effectively manage groundwater resources and solve issues of groundwater scarcity and water quality problems in arid and semi-arid locations.</p></div>","PeriodicalId":54616,"journal":{"name":"Physics and Chemistry of the Earth","volume":"136 ","pages":"Article 103722"},"PeriodicalIF":3.0,"publicationDate":"2024-08-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142121990","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Optimal design and techno-economic analysis of a solar-wind hybrid power system for laayoune city electrification with hydrogen and batteries as a storage device 以氢气和蓄电池为存储设备的阿尤恩城市电气化太阳能-风能混合发电系统的优化设计和技术经济分析

IF 3 3区地球科学

Physics and Chemistry of the Earth Pub Date : 2024-08-30 DOI: 10.1016/j.pce.2024.103719

Abdellah El-Maaroufi , Mohammed Daoudi , Rachid Ahl Laamara

{"title":"Optimal design and techno-economic analysis of a solar-wind hybrid power system for laayoune city electrification with hydrogen and batteries as a storage device","authors":"Abdellah El-Maaroufi , Mohammed Daoudi , Rachid Ahl Laamara","doi":"10.1016/j.pce.2024.103719","DOIUrl":"10.1016/j.pce.2024.103719","url":null,"abstract":"<div><p>The pressing environmental concerns associated with fossil fuels have propelled renewable energy sources, particularly solar and wind energy, into a more prominent position. This article aims to explore an optimal configuration and conduct a technical and economic analysis of a hybrid solar-wind energy system tailored for electrifying Laayoune city. This system, equipped with hydrogen tank and batteries as storage devices, aims to meet the annual energy requirements of residential areas estimated at 310.87 GWh/year. In addition to addressing energy needs, the study tackles significant challenges such as reducing dependence on traditional energy sources, curbing greenhouse gas emissions, and bolstering energy security in the region. Utilizing HOMER Pro software, the research evaluates various combinations of renewable resources, including solar and wind, alongside storage solutions such as batteries, fuel cells, and hydrogen storage, to find the most viable solution in terms of electricity generation, cost, and environmental impact. The findings highlight a hybrid configuration comprising solar, wind, battery, grid, and converter components as the most cost-effective approach for Laayoune's renewable energy system. This integrated system not only yields an energy cost of 0.0477 $/kWh and a net present cost (NPC) of 336 M$ but also generates 627.69 GWh/year of energy. Furthermore, it achieves a 100% renewable energy ratio while completely eliminating CO<sub>2</sub> emissions.</p></div>","PeriodicalId":54616,"journal":{"name":"Physics and Chemistry of the Earth","volume":"136 ","pages":"Article 103719"},"PeriodicalIF":3.0,"publicationDate":"2024-08-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142117636","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0