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

Assessment of surface water availability under different development and management scenarios in Kagera Basin, Tanzania 坦桑尼亚卡盖拉盆地不同开发和管理方案下的地表水可用性评估

IF 3 3区地球科学

Physics and Chemistry of the Earth Pub Date : 2024-11-02 DOI: 10.1016/j.pce.2024.103797

Faraji Nyudike , Joel Nobert , Subira Munishi

{"title":"Assessment of surface water availability under different development and management scenarios in Kagera Basin, Tanzania","authors":"Faraji Nyudike , Joel Nobert , Subira Munishi","doi":"10.1016/j.pce.2024.103797","DOIUrl":"10.1016/j.pce.2024.103797","url":null,"abstract":"<div><div>The Kagera basin faces increasing pressure to meet water demand for competing uses, necessitating a close look at social, economic, and environmental impacts of development. Recent years have seen significant growth in hydropower (Rusumo 80 MW, Kikagati 14 MW, Kakono 87 MW) and irrigated agriculture. Additionally, the full irrigation potential is planned for expansion from 45.15% (2016), alongside 94.71 ha allocated for large-scale manufacturing across six sub-catchments. To assess the impact of these developments on water availability, three scenarios (recent, medium-term, and long-term) were simulated using the MIKE HYDRO Basin model. This model, calibrated with baseline data (1982–2012), used river gauge data and the NAM rainfall-runoff model to estimate discharge and input flows. Results project total water demand to nearly double by 2040, reaching 823.4 Mm³/year, up from 415.2 Mm³/year in 2016. Water deficits are most severe from July to September, with the Kagera catchment showing the highest shortages, reaching 80.1 Mm³/year by 2040. Multi-Criteria Analysis (MCA) indicates Scenario 2 (irrigation capped at 60%) as the most sustainable, balancing social, economic, and environmental needs. These findings call for a re-evaluation of Kagera Basin development plans to align with sustainable water resource management.</div></div>","PeriodicalId":54616,"journal":{"name":"Physics and Chemistry of the Earth","volume":"136 ","pages":"Article 103797"},"PeriodicalIF":3.0,"publicationDate":"2024-11-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142587169","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

Comparative analysis of multiple observation data during two typhoons affecting Hainan Island 两次台风影响海南岛期间多重观测数据的对比分析

IF 3 3区地球科学

Physics and Chemistry of the Earth Pub Date : 2024-10-29 DOI: 10.1016/j.pce.2024.103795

Chenxiao Shi , Youlong Chen , Jianhua Du , Honghui Zheng

引用次数: 0

A review of remote sensing of flood monitoring and assessment in southern Africa 南部非洲洪水监测和评估遥感回顾

IF 3 3区地球科学

Physics and Chemistry of the Earth Pub Date : 2024-10-29 DOI: 10.1016/j.pce.2024.103796

Cletah Shoko , Timothy Dube

{"title":"A review of remote sensing of flood monitoring and assessment in southern Africa","authors":"Cletah Shoko , Timothy Dube","doi":"10.1016/j.pce.2024.103796","DOIUrl":"10.1016/j.pce.2024.103796","url":null,"abstract":"<div><div>Southern Africa is one of the most vulnerable regions to flooding and this severely impacts its economic development, human livelihoods and ecosystem functioning. In this regard, there is need to identify strategies to monitor flood occurrence, to minimize effects. Remote sensing is one of the key data sources for natural hazards monitoring, over space and time. This paper therefore provides the state-of-the-art review on flood monitoring, using remote sensing in southern Africa, since the emergency of earth observation technologies. Specifically, the review focused on how southern Africa has embraced remote sensing for mapping flood extent, vulnerable areas and impacts, over time. The review also highlights available remote sensing data and products, to monitor floods, including their success, limitations, and prospects for improved flood monitoring in the region. Overall, there has been limited use of remote sensing data in flood monitoring in southern Africa, until 2010. Since then, there was an increase in the use of remote sensing data, for flood monitoring. Most of these studies used the freely available Landsat and MODIS datasets, and these studies focused more on mapping the extent of flooding. However, as much as considerable strides were made, there is still more work to be done. Future research needs to shift towards the use of new generation remote sensing data, including radar, as well as high spatial resolution drones, before, during and after flood occurrence. Advanced cloud-computing, such as Google Earth Engine and machine learning algorithms, also present opportunity for time series analysis of flooding.</div></div>","PeriodicalId":54616,"journal":{"name":"Physics and Chemistry of the Earth","volume":"136 ","pages":"Article 103796"},"PeriodicalIF":3.0,"publicationDate":"2024-10-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142553955","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

On-site monitoring of expansive soil slope protected by soilbags based on the universal Beidou monitoring system 基于通用北斗监测系统对用土袋保护的膨胀性土坡进行现场监测

IF 3 3区地球科学

Physics and Chemistry of the Earth Pub Date : 2024-10-28 DOI: 10.1016/j.pce.2024.103775

Hongri Zhang , Jiming Yang , Sulian Lan , Youjun Li , Pengpeng Ni , Quanyu Chen , Yongfu Xu , Shuangcheng Zhang

{"title":"On-site monitoring of expansive soil slope protected by soilbags based on the universal Beidou monitoring system","authors":"Hongri Zhang , Jiming Yang , Sulian Lan , Youjun Li , Pengpeng Ni , Quanyu Chen , Yongfu Xu , Shuangcheng Zhang","doi":"10.1016/j.pce.2024.103775","DOIUrl":"10.1016/j.pce.2024.103775","url":null,"abstract":"<div><div>To explore an effective method for deformation monitoring and behavior prediction of expansive soil slope, field tests are conducted for a flexible slope protection scheme with soilbags that has been implemented in an expansive highway soil slope. A new monitoring system, i.e., the universal Beidou deformation monitoring system, is developed to overcome the limitations of traditional Global Navigation Satellite System (GNSS) software and hardware, simplify the hardware structure and realize the power sharing mode; furthermore, this system can create and upload a large amount of monitored data to a cloud platform to enable real-time calculation. Compared with traditional GNSS, the volume of equipment required is reduced by approximately 75%, and the cost is reduced by approximately 80%. Secondly, a multilevel safety early-warning evaluation system is constructed by integrating the monitoring results of the universal Beidou deformation monitoring system, bag damage states, rainfall conditions, and slope fissure development; additionally, a deformation early-warning mechanism of flexible support of soilbags was established. Finally, the deformation and collapse of flexible supports of soilbags can be successfully predicted in the field. This research on flexible support of soilbags provides new ideas and methods of deformation monitoring, safety evaluation, and early warning for expansive soil slopes.</div></div>","PeriodicalId":54616,"journal":{"name":"Physics and Chemistry of the Earth","volume":"136 ","pages":"Article 103775"},"PeriodicalIF":3.0,"publicationDate":"2024-10-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142553954","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

Appraisal of groundwater suitability for drinking and irrigation utilities in the Cooum River basin, South India: Implications from uranium, nitrate, and fluoride health risks 印度南部库姆河流域地下水饮用和灌溉适宜性评估：铀、硝酸盐和氟化物对健康的影响

IF 3 3区地球科学

Physics and Chemistry of the Earth Pub Date : 2024-10-25 DOI: 10.1016/j.pce.2024.103792

M. Sivakumar , T. Subramani , V.N. Prapanchan , D. Karunanidhi

{"title":"Appraisal of groundwater suitability for drinking and irrigation utilities in the Cooum River basin, South India: Implications from uranium, nitrate, and fluoride health risks","authors":"M. Sivakumar , T. Subramani , V.N. Prapanchan , D. Karunanidhi","doi":"10.1016/j.pce.2024.103792","DOIUrl":"10.1016/j.pce.2024.103792","url":null,"abstract":"<div><div>The study reveals that 6% of groundwater samples exceed the WHO's recommended fluoride limit of 1.5 mg/L, and 15% surpass the nitrate standard of 45 mg/L, rendering the water unsuitable for drinking. Gibbs plot analysis identifies evaporation as the dominant factor affecting groundwater chemistry, while the Piper diagram classifies the water into mixed Ca–Mg–Cl and NaCl types, indicating natural processes and potential seawater intrusion. Cation exchange processes are observed in 75.5% of samples, as shown by Schoeller's indices. The hydrochemical facies evolution suggests freshening from recharge in most samples, with signs of salinity intrusion in others. Between 2010 and 2023, land use and land cover (LULC) changes show a significant increase in built-up areas, resulting in reduced groundwater recharge and heightened pollution risks. The classification accuracy is high, with an overall accuracy of 82.20% and a Kappa coefficient of 83.06%. Water Quality Index (WQI) assessment reveals that 47% of the groundwater samples are excellent for drinking, while 20.6% are suitable. Although 80% of the groundwater remains appropriate for agriculture, the study highlights the need for targeted groundwater management to address urbanization impacts and mitigate health risks from elevated nitrate ingestion, particularly for vulnerable populations such as children.</div></div>","PeriodicalId":54616,"journal":{"name":"Physics and Chemistry of the Earth","volume":"136 ","pages":"Article 103792"},"PeriodicalIF":3.0,"publicationDate":"2024-10-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142553951","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

Probabilistic retro-analysis of failed OB dump on the weak ground with water table variation and varied preventive measures 对地下水位变化的软弱地基上转播台倾倒失败的概率回溯分析及各种预防措施

IF 3 3区地球科学

Physics and Chemistry of the Earth Pub Date : 2024-10-24 DOI: 10.1016/j.pce.2024.103784

Rahul Shende, Srinivasan V, Mohammad Sameer Ahmed, Anirban Mandal

引用次数: 0

Spatial distribution of groundwater quality and risk indices evaluation via consumption 地下水质量的空间分布和通过消耗进行的风险指数评估

IF 3 3区地球科学

Physics and Chemistry of the Earth Pub Date : 2024-10-24 DOI: 10.1016/j.pce.2024.103789

Said Muhammad , Rizwan Ullah , Sehrish Amin , Haseeb Haroon , Ashfaq Ahmad

{"title":"Spatial distribution of groundwater quality and risk indices evaluation via consumption","authors":"Said Muhammad , Rizwan Ullah , Sehrish Amin , Haseeb Haroon , Ashfaq Ahmad","doi":"10.1016/j.pce.2024.103789","DOIUrl":"10.1016/j.pce.2024.103789","url":null,"abstract":"<div><div>Groundwater is a valuable source for drinking and irrigation use and is the primary concern of developing countries. Therefore, the current study investigated groundwater in the Mirpur District of Azad Jammu and Kashmir, Pakistan, for drinking and irrigation purposes. Groundwater was sampled from the Jatlan, Mirpur, and Dadyal towns of studied district and analyzed for physicochemical parameters. Groundwater results revealed that the WHO's upper limits were not surpassed for physiochemical parameters, except for pH value (11.7% samples). Groundwater was evaluated for various quality and risk indices. Based on the water quality index (WQI), groundwater was categorized as excellent to good for drinking use. For irrigation uses, 11.7% of Mirpur and 5.8% of Dadyal water were unsuitable, and the rest was found in the good category as evaluated by sodium adsorption ratio and sodium hazards. The groundwater was classified as calcium sulfate (CaSO<sub>4</sub>), and mixed types and hydrogeochemistry were predominantly influenced by surrounding rock weathering. The groundwater showed a maximum level of hazard quotient of 0.20 ± 0.05 via fluoride intake in the Dadyal town. Based on studied parameters and risk indices, groundwater is recommended for drinking, domestic, and agricultural purposes.</div></div>","PeriodicalId":54616,"journal":{"name":"Physics and Chemistry of the Earth","volume":"136 ","pages":"Article 103789"},"PeriodicalIF":3.0,"publicationDate":"2024-10-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142539588","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

Multiscale investigations on RDI-SPI teleconnections of Çoruh and Aras Basins, Türkiye using time dependent intrinsic correlation 利用时间相关性对土耳其乔鲁赫盆地和阿拉斯盆地的 RDI-SPI 远距离联系进行多尺度研究

IF 3 3区地球科学

Physics and Chemistry of the Earth Pub Date : 2024-10-24 DOI: 10.1016/j.pce.2024.103787

Oguz Simsek , Adarsh Sankaran , Halil İbrahim Şenol

{"title":"Multiscale investigations on RDI-SPI teleconnections of Çoruh and Aras Basins, Türkiye using time dependent intrinsic correlation","authors":"Oguz Simsek , Adarsh Sankaran , Halil İbrahim Şenol","doi":"10.1016/j.pce.2024.103787","DOIUrl":"10.1016/j.pce.2024.103787","url":null,"abstract":"<div><div>This paper proposes a multiscale dynamic correlation framework based on time-dependent intrinsic correlation (TDIC) to investigate the teleconnections between reconnaissance drought index (RDI) and standardized precipitation index (SPI). The SPI and RDI indices were calculated at 3-, 6-, and 12-month time scales using data from six stations in the Çoruh and Aras (CA) basins in Turkey for the 1969–2020 period. The spatial variability of the evaluation of the drought class demonstrated that, with the exception of the northwestern region (Bayburt station), the correlation between RDI and SPI exceeded 97% and the difference in occurrence between drought classes is found to be marginal. In the multiscale analysis of the two indices, firstly, the Improved Complete Ensemble Empirical Mode Decomposition with Adaptive Noise (I-CEEMDAN) was employed to decompose the series. The modes of RDI and SPI at different process scales exhibited a strong positive linear correlation, however, the association in their long-term trends may not be of the same nature. The TDIC analysis captured the long-range correlations between the modes of RDI and SPI at diverse process scales, and the newly proposed average significant correlation (ASC) measure could quantify their strength. Within the basin, there exists strong interconnections between SPI and RDI, with the exception of the observed alterations in their nature and strength at short time spells in some inter-annual scales. The proposed TDIC based framework is a generic and robust alternative for multiscale investigation studies while ASC can quantify the strength of non-linear associations at distinct process scales.</div></div>","PeriodicalId":54616,"journal":{"name":"Physics and Chemistry of the Earth","volume":"136 ","pages":"Article 103787"},"PeriodicalIF":3.0,"publicationDate":"2024-10-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142553953","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

CO2 flux emissions at two urban sites in Beijing and responses to human activity 北京两个城市地点的二氧化碳通量排放及对人类活动的响应

IF 3 3区地球科学

Physics and Chemistry of the Earth Pub Date : 2024-10-24 DOI: 10.1016/j.pce.2024.103791

Huanhuan Liu , Weiqi Zhou , Jia Wang , Zhong Zheng , Xinyu Li , Lu Zhao

{"title":"CO2 flux emissions at two urban sites in Beijing and responses to human activity","authors":"Huanhuan Liu , Weiqi Zhou , Jia Wang , Zhong Zheng , Xinyu Li , Lu Zhao","doi":"10.1016/j.pce.2024.103791","DOIUrl":"10.1016/j.pce.2024.103791","url":null,"abstract":"<div><div>During the COVID-19 pandemic in 2020–2021, continuous measurements of CO<sub>2</sub> flux were conducted using the eddy covariance method at two representative urban sites in Beijing, China, to assess the temporal and spatial variability of CO<sub>2</sub> emissions in urban areas. We further examined the impacts of vegetation and human activities on CO<sub>2</sub> emissions. Both sites exhibited characteristics of urban carbon sources in the two years, with higher carbon emissions observed at the Beijing Academy of Landscape and Greening Science (BALGS) site compared to that in the campus of the Research Center of Eco-Environment (RCEES), Chinese Academy of Science. Although the seasonal and diurnal patterns of CO<sub>2</sub> flux were similar at both sites, differences in the magnitude of CO<sub>2</sub> flux emissions were primarily attributed to variations in underlying surface characteristics within the source area. Seasonal variations and daytime carbon uptake reflected the role of urban vegetation in carbon sequestration. Additionally, our observations revealed that the implementation of COVID-19 control measures effectively reduced urban carbon emissions, with stricter controls associated with lower carbon emissions. Furthermore, we compared the differences in carbon emission reductions between anthropogenic controls and seasonal variations at the two sites. We found that at the densely trafficked BALGS site, the impact of control measures on carbon emission reductions was more pronounced, while at the RCEES site, seasonal variations contributed more to carbon uptake compared to control measures.</div></div>","PeriodicalId":54616,"journal":{"name":"Physics and Chemistry of the Earth","volume":"136 ","pages":"Article 103791"},"PeriodicalIF":3.0,"publicationDate":"2024-10-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142539592","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

Development of a natural inorganic diatomite curing agent on heavy metal-contaminated loess 在重金属污染黄土上开发天然无机硅藻土固化剂

IF 3 3区地球科学

Physics and Chemistry of the Earth Pub Date : 2024-10-24 DOI: 10.1016/j.pce.2024.103790

Bing Bai, Bixia Zhang, Jing Chen, Hanxiang Feng

引用次数: 0