Bulletin of Geography. Physical Geography Series最新文献

The impact of land use and land cover changes on ecosystem service value in Aceh Besar Regency, Aceh, Indonesia 土地利用和土地覆被变化对印度尼西亚亚齐省亚齐 Besar 地区生态系统服务价值的影响

Bulletin of Geography. Physical Geography Series Pub Date : 2024-06-10 DOI: 10.12775/bgeo-2024-0005

Ashfa Achmad, I. Ramli, N. Nizamuddin, Arief Gunawan, Siti Zahrina Fakhrana

引用次数: 0

Large-scale bedforms in the vicinity of Serwy Lake (NE Poland): their morphometry and links to the high-energy glaciofluvial environment 塞尔维湖（波兰东北部）附近的大尺度湖床地貌：形态学及其与高能冰川流环境的联系

Bulletin of Geography. Physical Geography Series Pub Date : 2024-06-07 DOI: 10.12775/bgeo-2024-0004

Mateusz Suwiński, Piotr Weckwerth

{"title":"Large-scale bedforms in the vicinity of Serwy Lake (NE Poland): their morphometry and links to the high-energy glaciofluvial environment","authors":"Mateusz Suwiński, Piotr Weckwerth","doi":"10.12775/bgeo-2024-0004","DOIUrl":"https://doi.org/10.12775/bgeo-2024-0004","url":null,"abstract":"The Suwałki Glacial Megaflood Landsystem documented in NE Poland led to further morphological analysis of bedforms that originated from glacial lake-outburst floods (GLOFs) in the central and eastern parts of the Augustów Plain. This article focuses on (1) the recognition of large-scale subaqueous dunes in the vicinity of Serwy Lake, (2) the creation of a database consisting of relevant morphometric parameters (lengths, heights and gradients of stoss and lee slopes) and indexes (steepness and asymmetry ratios) and (3) comparison with other landforms that undoubtably indicate glacial floods (e.g., Missoula, Altai, British Columbia, Wigry Lake). The remote identification and measurement of the megadunes’ morphometry based on LiDAR data and digital elevation model with resolution 1×1 m (using hillshade and geomorphons) yielded data characterising 254 bedforms. These represent two-dimensional large-scale subaqueous dunes, which have lengths varying between 23.6 and 241.8 m and average heights of 0.6–5.4 m. Moreover, their morphometric variation creates a continuum typical of subaqueous dunes and has similarities to prominent examples linked to GLOFs. The study is especially crucial due to the lack of a wide range of information about megadune development under unconfined settings during the Weichselian glaciation.","PeriodicalId":502626,"journal":{"name":"Bulletin of Geography. Physical Geography Series","volume":" 18","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-06-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141371242","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

Application of accuracy improvement algorithms for extraction of topographic information and drainage network from DEM using GIS 应用精度改进算法，利用地理信息系统从 DEM 提取地形信息和排水管网

Bulletin of Geography. Physical Geography Series Pub Date : 2024-06-03 DOI: 10.12775/bgeo-2024-0003

Sunanda Nagabathula, Srinivasa Rao Yammani

{"title":"Application of accuracy improvement algorithms for extraction of topographic information and drainage network from DEM using GIS","authors":"Sunanda Nagabathula, Srinivasa Rao Yammani","doi":"10.12775/bgeo-2024-0003","DOIUrl":"https://doi.org/10.12775/bgeo-2024-0003","url":null,"abstract":"The extraction of drainage network and watershed information is prerequisite for the study of watershed characteristics like morphometric analysis, which provides a basis for hydrological planning and modeling. The advanced tools of algorithms, Shuttle Radar Topographic Mission (SRTM) Digital Elevation Model (DEM) data and Geographical Information System (GIS) software are used to extract drainage networks and their watershed boundaries. These tools are complicated to use or produce more errors in the extraction of elevation and drainage networks when applied to flat areas. For removal of errors and to improve the accuracy in preparation of DEM and extraction of drainage network, Burada Kalava River Basin, Andhra Pradesh, India has been taken for application of accuracy improvement algorithms. An automatic generation of drainage network and watershed using digital elevation model results in positional errors due to variations in slope and topography. This study aimed to generate a catchment area and stream network that closely represent the natural stream network and the streams’ real positions. The step-by-step methodology using GRASS-interfaced Quantum GIS algorithms are given for pre-processing of DEM data to improve the positional accuracy before automatic extraction of the stream network and catchment area to resemble the real situation of the watershed. Secondly, efforts are made to analyze the DEM during automatic generation of the stream network and catchment area by assigning various area threshold values, including the application of pour point coordinates in improving the stream network and watershed characteristics. The results are verified and validated with the field information in order to improve the accuracy levels of DEM quality in generation of drainage network and catchment area.","PeriodicalId":502626,"journal":{"name":"Bulletin of Geography. Physical Geography Series","volume":"47 21","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-06-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141269886","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

Thermal regimes of lakes in the southern and eastern part of the Baltic Sea catchment area during the period of climate change 气候变化期间波罗的海集水区南部和东部湖泊的热量机制

Bulletin of Geography. Physical Geography Series Pub Date : 2024-01-02 DOI: 10.12775/bgeo-2023-0008

R. Skowron, Tomasz Jaszczyk

引用次数: 0

Rainwater management in urban areas in Poland: literature review 波兰城市地区的雨水管理：文献综述

Bulletin of Geography. Physical Geography Series Pub Date : 2023-12-12 DOI: 10.12775/bgeo-2023-0006

Adam Piasecki, Agnieszka Pilarska

引用次数: 0