AUC Geographica最新文献

Short-term geomorphic adjustments of bars in the Elbe, a large regulated river in Czechia 易北河--捷克的一条大型调节河流--栅栏的短期地貌调整

IF 0.6

AUC Geographica Pub Date : 2024-06-10 DOI: 10.14712/23361980.2024.7

T. Galia, V. Škarpich, Adriana Holušová, Jan Hradecký

{"title":"Short-term geomorphic adjustments of bars in the Elbe, a large regulated river in Czechia","authors":"T. Galia, V. Škarpich, Adriana Holušová, Jan Hradecký","doi":"10.14712/23361980.2024.7","DOIUrl":"https://doi.org/10.14712/23361980.2024.7","url":null,"abstract":"Gravel and sandy bars constitute critical components of river channel morphology, yet their morphodynamics in large, heavily regulated rivers during periods without significant flows remain poorly understood. This study investigates changes in surface heterogeneity and sediment sizes through a two-year field monitoring program, focusing on the frontal, central, and distal sections of four bars along the Elbe River in Czechia. Despite the absence of high-flow events reaching at least a one-year recurrence interval, observable changes in surface heterogeneity and sediment sizes were noted across all bars. However, the changes did not follow a uniform pattern; individual bars and their sections exhibited varying degrees of surface sediment coarsening or fining, alongside increases or decreases in surface heterogeneity. These findings highlight the necessity for site-specific management strategies for individual bars within such human-impacted rivers, recognizing their value as ecological hotspots. Furthermore, the methodology presented in this study may serve as a blueprint for the cost-effective monitoring of bar dynamics in channelized river sections.","PeriodicalId":41831,"journal":{"name":"AUC Geographica","volume":null,"pages":null},"PeriodicalIF":0.6,"publicationDate":"2024-06-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141361989","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Hazards profile of the Shigar Valley, Central Karakoram, Pakistan: Multicriteria hazard susceptibility assessment 巴基斯坦喀喇昆仑山中部希格尔山谷的灾害概况：多标准灾害易感性评估

IF 0.6

AUC Geographica Pub Date : 2024-05-22 DOI: 10.14712/23361980.2024.5

Munazza Afreen, Fazlul Haq, Bryan G. Mark

{"title":"Hazards profile of the Shigar Valley, Central Karakoram, Pakistan: Multicriteria hazard susceptibility assessment","authors":"Munazza Afreen, Fazlul Haq, Bryan G. Mark","doi":"10.14712/23361980.2024.5","DOIUrl":"https://doi.org/10.14712/23361980.2024.5","url":null,"abstract":"The rapid deglaciation in the Upper Indus Basin (UIB) significantly impacts local landscapes, watersheds, and basin-wide hydrology. While creating new opportunities, such as emerging landscapes and hydrological changes, deglaciation simultaneously heightens the risk of glacio-hydrological hazards in adjacent and downstream regions. With limited available land for agriculture and settlements, communities around glaciers expand human activities toward newly formed floodplains and deglaciating valleys, necessitating a comprehensive understanding of associated risks and vulnerabilities. This study employs Geographical Information System (GIS) and Remote Sensing products for a multicriteria hazards susceptibility assessment in the Shigar Valley, located in the downstream of major Himalayan glaciers – the Baltoro (63 km) and Biafo (67 km) glaciers. The research reveals that 28.3% of the valley is highly susceptible to multiple hazards, emphasizing the urgency of informed decision-making in the region. Only 0.03% area lies in the very low susceptible category, 9.7% in the low susceptible, 60.6% in the moderately susceptible, and 1.04% in the very highly susceptible categories. These findings highlight the need for proactive measures, adaptive strategies, and sustainable development in the Shigar Valley to mitigate the escalating risks posed by deglaciation and changing hydrological patterns.","PeriodicalId":41831,"journal":{"name":"AUC Geographica","volume":null,"pages":null},"PeriodicalIF":0.6,"publicationDate":"2024-05-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141108765","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

The nature, dimensions, causes and implications of in and out migration in North-East India 印度东北部人口迁入迁出的性质、规模、原因和影响

IF 0.6

AUC Geographica Pub Date : 2024-04-09 DOI: 10.14712/23361980.2024.2

Arundhuti Patangia, Bimal K. Kar

引用次数: 0

The COVID-19 disaster in Mexico City: Exploring risk drivers at the local scale 墨西哥城 COVID-19 灾害：探索当地范围内的风险驱动因素

IF 0.6

AUC Geographica Pub Date : 2024-03-21 DOI: 10.14712/23361980.2024.1

Perla Lorena Romero-Gaeta, I. Alcántara-Ayala

{"title":"The COVID-19 disaster in Mexico City: Exploring risk drivers at the local scale","authors":"Perla Lorena Romero-Gaeta, I. Alcántara-Ayala","doi":"10.14712/23361980.2024.1","DOIUrl":"https://doi.org/10.14712/23361980.2024.1","url":null,"abstract":"The COVID-19 pandemic had a significant impact on the inhabitants of Mexico City. With over 9 million people living in 16 districts, infections and mortality rates varied greatly. In this article, demographic and socio-economic factors were analyzed to determine vulnerability and exposure to COVID-19 during the crisis from 27 February 2020 to 10 May 2021. The study revealed that mortality and infections were distributed differently across the districts of Mexico City. The districts with the most confirmed cases did not necessarily have the highest death rates. Many deaths were linked to age and comorbidities, such as hypertension, diabetes, and obesity. Poverty, overcrowding, the lack of space, and basic services contributed to vulnerability and exposure to the disease. Inequalities in the city’s development over time resulted in varying degrees of vulnerability and exposure to COVID-19, leading to different patterns of infections and deaths across the districts. The prevalence of infections in the city´s southwestern districts can be attributed to the combination of marginalization, poverty, and inadequate services. Conversely, the northwest areas of the city, with a higher concentration of elderly residents, experienced a greater number of fatalities.","PeriodicalId":41831,"journal":{"name":"AUC Geographica","volume":null,"pages":null},"PeriodicalIF":0.6,"publicationDate":"2024-03-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140223127","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Improving vegetation spatial distribution mapping in arid and on coastal dune systems using GPR in Tottori Prefecture (Japan) 利用 GPR 改进鸟取县干旱地区和沿海沙丘系统的植被空间分布绘图（日本）

IF 0.6

AUC Geographica Pub Date : 2023-12-18 DOI: 10.14712/23361980.2023.18

Christopher Gomez, Jiaqi Liu, Jing Wu, Frans C. Persendt, B. Bradák, Yousefi Saleh, D. Hadmoko

引用次数: 0

The typology of countryside architectonical forms in South-Moravia, a region of Czechia 捷克南摩拉维亚地区乡村建筑形式的类型学

IF 0.6

AUC Geographica Pub Date : 2023-12-14 DOI: 10.14712/23361980.2023.16

Andrea Lešková, A. Vaishar

引用次数: 0

Consequences of capital drain among EU member states 欧盟成员国之间资本外流的后果

IF 0.6

AUC Geographica Pub Date : 2023-11-29 DOI: 10.14712/23361980.2023.17

Peter Deďo, David Hána

引用次数: 0

IF 0.6

AUC Geographica Pub Date : 2023-11-21 DOI: 10.14712/23361980.2023.15

Petr Horák

引用次数: 0

Tuning spatial parameters of Geographical Random Forest: the case of agricultural drought 地理随机森林空间参数调优:以农业干旱为例

AUC Geographica Pub Date : 2023-11-01 DOI: 10.14712/23361980.2023.14

Daniel Bicák

引用次数: 0

Assessment of forest cover and forest loss using satellite images in Thua Thien Hue province, Vietnam 利用卫星图像评估越南顺化省的森林覆盖和森林损失

AUC Geographica Pub Date : 2023-11-01 DOI: 10.14712/23361980.2023.13

Bui B. Thien, Vu T. Phuong, Akinola A. Komolafe

{"title":"Assessment of forest cover and forest loss using satellite images in Thua Thien Hue province, Vietnam","authors":"Bui B. Thien, Vu T. Phuong, Akinola A. Komolafe","doi":"10.14712/23361980.2023.13","DOIUrl":"https://doi.org/10.14712/23361980.2023.13","url":null,"abstract":"Deforestation in the tropics continues inexorably with severe implications for biodiversity conservation, climate regulation and ecosystem services. This study investigated variation in forest cover in Thua Thien Hue province, Vietnam, using the Landsat Thematic Mapper and Operational Land Imager satellite images over the period 1989–2021. Imageries were classified using the maximum likelihood classification technique for the years 1989, 2006, and 2021 and were evaluated for accuracy using the kappa coefficient for each year. Furthermore, forest cover losses and gains were evaluated using the Normalized Difference Vegetation Index and Soil Adjusted Vegetation Index, which were compared with the output of the supervised classification. Results showed that the forest cover of Thua Thien Hue province has drastically declined over the years. The forest cover, which was estimated at 68.88% (3461.46 km2) of the total land area in 1989, increased to 69.04% (3469.51 km2) in 2006 and subsequently decreased to 57.55% (2891.81 km2) in 2021. Severely reduced forest cover is often associated with the expansion of agriculture on the forest edge; other contributing factors include logging, illegal production land, and forest fires. Overall, our results show the necessity of forest management, rational land-use planning policy, and increased community awareness of conservation and sustainable development of forest resources in the study area in the future.","PeriodicalId":41831,"journal":{"name":"AUC Geographica","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135216438","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0