Pub Date : 2023-05-11DOI: 10.1080/02723646.2023.2212422
J. Richards, Elizabeth L. Cooke, M. Coombes, Johanna Jones, H. Viles
{"title":"Evaluating the robustness of nature-based solutions: future resilience of sedum-based soft capping as a conservation approach for heritage sites in Britain and Ireland","authors":"J. Richards, Elizabeth L. Cooke, M. Coombes, Johanna Jones, H. Viles","doi":"10.1080/02723646.2023.2212422","DOIUrl":"https://doi.org/10.1080/02723646.2023.2212422","url":null,"abstract":"","PeriodicalId":54618,"journal":{"name":"Physical Geography","volume":null,"pages":null},"PeriodicalIF":1.6,"publicationDate":"2023-05-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48646204","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-05-04DOI: 10.1080/02723646.2022.2082352
Manas Karmakar, Monali Banerjee, Debasish Ghosh
ABSTRACT The Upper Subarnarekha Kangsabati Interfluve (USKI) belongs to the eastern margin of CGGC, which is part of East Indian Shield. This Proterozoic (1.72–1.87 Ga) terrain had have experienced intensive weathering processes over the long period under different climatic conditions. A total number of 965 Rebound (R) value were collected from eight geomorphic features located in the USKI. In the present study, an attempt has been made to synthesize the history and variation in intensity of weathering using Schmidt hammer (SH). The degree of weathering is calculated using micro-weathering index, which is formulated on Schmidt hammer R-values, collected from deeply weathered (DW) and relatively less weathered (RLW) rock surfaces. The results of the study revealed the different response of diverse types of rock to the geomorphic processes. The weathering grade of each identified geomorphic features has been computed and the results revealed that seven features belong to moderately weathered (grade III) out of eight identified features. The present study is a unique attempt considering multi-cyclic evolution of CGGC to understand the degree of weathering of these studied features, belonging from USKI. This study helps to understand the weathering grade of studied features in quantitative way.
{"title":"Evaluation of micro-weathering index and weathering grade of diverse geomorphic features of proterozoic terrain applying Schmidt hammer","authors":"Manas Karmakar, Monali Banerjee, Debasish Ghosh","doi":"10.1080/02723646.2022.2082352","DOIUrl":"https://doi.org/10.1080/02723646.2022.2082352","url":null,"abstract":"ABSTRACT The Upper Subarnarekha Kangsabati Interfluve (USKI) belongs to the eastern margin of CGGC, which is part of East Indian Shield. This Proterozoic (1.72–1.87 Ga) terrain had have experienced intensive weathering processes over the long period under different climatic conditions. A total number of 965 Rebound (R) value were collected from eight geomorphic features located in the USKI. In the present study, an attempt has been made to synthesize the history and variation in intensity of weathering using Schmidt hammer (SH). The degree of weathering is calculated using micro-weathering index, which is formulated on Schmidt hammer R-values, collected from deeply weathered (DW) and relatively less weathered (RLW) rock surfaces. The results of the study revealed the different response of diverse types of rock to the geomorphic processes. The weathering grade of each identified geomorphic features has been computed and the results revealed that seven features belong to moderately weathered (grade III) out of eight identified features. The present study is a unique attempt considering multi-cyclic evolution of CGGC to understand the degree of weathering of these studied features, belonging from USKI. This study helps to understand the weathering grade of studied features in quantitative way.","PeriodicalId":54618,"journal":{"name":"Physical Geography","volume":null,"pages":null},"PeriodicalIF":1.6,"publicationDate":"2023-05-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48427214","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-04-19DOI: 10.1080/02723646.2023.2202932
M. Joshi, G. Kothyari, B. Kotlia
{"title":"Landslide detection in Kinnaur Valley, NW India using PS-InSAR technique","authors":"M. Joshi, G. Kothyari, B. Kotlia","doi":"10.1080/02723646.2023.2202932","DOIUrl":"https://doi.org/10.1080/02723646.2023.2202932","url":null,"abstract":"","PeriodicalId":54618,"journal":{"name":"Physical Geography","volume":null,"pages":null},"PeriodicalIF":1.6,"publicationDate":"2023-04-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45356134","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-04-17DOI: 10.1080/02723646.2023.2202934
Madhukar Srigyan, N. Tripathi, Sudheer Kumar Singh, B. P. Rathore, S. Oza, I. Bahuguna
ABSTRACT The majority of studies discuss the impact of supraglacial debris on glaciers’ health while the rationale behind the formation and regional distribution of supraglacial debris in the Himalayan-Karakoram (H-K) region is sparsely researched. The present study attempts to evaluate the role of meteorological, topographical, and geological parameters to understand the regional distribution and plausible genesis of supraglacial debris in the H-K area. Glacier-wise Fractional Debris Cover (FDC) for ~5000 glaciers have been estimated using LANDSAT-7 data (1999–2001) based on the Normalized Difference Snow Index. The aforementioned parameters, including FDC, are compiled into a comprehensive database and analysed. Moreover, “2-meter air temperature” from ERA-5 climatological data is used to estimate the number of Freeze–Thaw Cycles. Overall meteorological and topographical parameters show a significant correlation with the distribution of FDC across the H-K region, more prominently for glaciers having low FDC (<0.2). FDC distribution shows a strong dependency on glacier hypsometry with the highest FDC for “Very Bottom Heavy” glaciers and the lowest for “Very Top Heavy” glaciers. The glaciers with Limestone bearing lithology have maximum FDC and are sparsely distributed, but the glaciers with quartzite bearing lithology are widely distributed across the region and have lower FDC.
{"title":"Understanding the spatial distribution and plausible genesis of supraglacial debris over the Himalaya-Karakoram region","authors":"Madhukar Srigyan, N. Tripathi, Sudheer Kumar Singh, B. P. Rathore, S. Oza, I. Bahuguna","doi":"10.1080/02723646.2023.2202934","DOIUrl":"https://doi.org/10.1080/02723646.2023.2202934","url":null,"abstract":"ABSTRACT The majority of studies discuss the impact of supraglacial debris on glaciers’ health while the rationale behind the formation and regional distribution of supraglacial debris in the Himalayan-Karakoram (H-K) region is sparsely researched. The present study attempts to evaluate the role of meteorological, topographical, and geological parameters to understand the regional distribution and plausible genesis of supraglacial debris in the H-K area. Glacier-wise Fractional Debris Cover (FDC) for ~5000 glaciers have been estimated using LANDSAT-7 data (1999–2001) based on the Normalized Difference Snow Index. The aforementioned parameters, including FDC, are compiled into a comprehensive database and analysed. Moreover, “2-meter air temperature” from ERA-5 climatological data is used to estimate the number of Freeze–Thaw Cycles. Overall meteorological and topographical parameters show a significant correlation with the distribution of FDC across the H-K region, more prominently for glaciers having low FDC (<0.2). FDC distribution shows a strong dependency on glacier hypsometry with the highest FDC for “Very Bottom Heavy” glaciers and the lowest for “Very Top Heavy” glaciers. The glaciers with Limestone bearing lithology have maximum FDC and are sparsely distributed, but the glaciers with quartzite bearing lithology are widely distributed across the region and have lower FDC.","PeriodicalId":54618,"journal":{"name":"Physical Geography","volume":null,"pages":null},"PeriodicalIF":1.6,"publicationDate":"2023-04-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48703991","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-03-15DOI: 10.1080/02723646.2023.2188633
Z. Zafar, M. S. Mehmood, Ammar Akbar, Muhammad Afzaal Khan
ABSTRACT Surface water and snow cover in mountainous areas are sensitive to climate change. Pakistan’s irrigation water supply primarily depends on the Indus River. Identifying the spatio-temporal dynamics, response patterns of snow cover area (SCA) and surface water bodies (SWB) to climate change are vital for understanding the changes in the hydrological process of the Indus basin. Therefore, the SWB area was investigated using surface reflectance data (MOD09A1) from the Moderate Resolution Imaging Spectroradiometer (MODIS) and SCA changes were examined using MODIS snow cover data (MOD10A2) from 2009 to 2018 in Gilgit Baltistan with respect to climatic variables. According to results the SWB area in Gilgit Baltistan, for annual, summer and winter, changes at the rate of −0.00057% yr−1 (p > 0.05), −0.00042% yr−1 (p > 0.05) and 0.00037% yr−1 (p > 0.05), respectively. Moreover, annual mean temperature and the SWB exhibited a negative correlation (r = −0.244, p > 0.05) and correlation between SWB and total annual precipitation was positive (r = 0.535, p > 0.05). However, SCA of Gilgit Baltistan changed at the rate of −0.396% yr−1 (p < 0.05), −0.940% yr−1 (p < 0.05) and −0.253% yr−1 (p > 0.05) for annual, summer and winter, respectively. Furthermore, annual mean temperature and SCA exhibited a negative correlation (r = −0.731, p < 0.05), whereas annual total precipitation and SCA showed a positive correlation (r = 0.636, p < 0.05). These results indicated that climate had been significantly affected the SCA and SWB of the Gilgit Baltistan.
{"title":"Spatiotemporal dynamics analysis of surface water body and snow cover area to climate change in Gilgit Baltistan, Pakistan","authors":"Z. Zafar, M. S. Mehmood, Ammar Akbar, Muhammad Afzaal Khan","doi":"10.1080/02723646.2023.2188633","DOIUrl":"https://doi.org/10.1080/02723646.2023.2188633","url":null,"abstract":"ABSTRACT Surface water and snow cover in mountainous areas are sensitive to climate change. Pakistan’s irrigation water supply primarily depends on the Indus River. Identifying the spatio-temporal dynamics, response patterns of snow cover area (SCA) and surface water bodies (SWB) to climate change are vital for understanding the changes in the hydrological process of the Indus basin. Therefore, the SWB area was investigated using surface reflectance data (MOD09A1) from the Moderate Resolution Imaging Spectroradiometer (MODIS) and SCA changes were examined using MODIS snow cover data (MOD10A2) from 2009 to 2018 in Gilgit Baltistan with respect to climatic variables. According to results the SWB area in Gilgit Baltistan, for annual, summer and winter, changes at the rate of −0.00057% yr−1 (p > 0.05), −0.00042% yr−1 (p > 0.05) and 0.00037% yr−1 (p > 0.05), respectively. Moreover, annual mean temperature and the SWB exhibited a negative correlation (r = −0.244, p > 0.05) and correlation between SWB and total annual precipitation was positive (r = 0.535, p > 0.05). However, SCA of Gilgit Baltistan changed at the rate of −0.396% yr−1 (p < 0.05), −0.940% yr−1 (p < 0.05) and −0.253% yr−1 (p > 0.05) for annual, summer and winter, respectively. Furthermore, annual mean temperature and SCA exhibited a negative correlation (r = −0.731, p < 0.05), whereas annual total precipitation and SCA showed a positive correlation (r = 0.636, p < 0.05). These results indicated that climate had been significantly affected the SCA and SWB of the Gilgit Baltistan.","PeriodicalId":54618,"journal":{"name":"Physical Geography","volume":null,"pages":null},"PeriodicalIF":1.6,"publicationDate":"2023-03-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43187917","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-03-13DOI: 10.1080/02723646.2023.2188635
Snehasish Ghosh, R. Sivakumar
{"title":"Tectono-geomorphic anomaly and its significance for monitoring seismotectonic activity in Lower Tista sub-basin, India, using geoinformatics","authors":"Snehasish Ghosh, R. Sivakumar","doi":"10.1080/02723646.2023.2188635","DOIUrl":"https://doi.org/10.1080/02723646.2023.2188635","url":null,"abstract":"","PeriodicalId":54618,"journal":{"name":"Physical Geography","volume":null,"pages":null},"PeriodicalIF":1.6,"publicationDate":"2023-03-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49242241","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-03-13DOI: 10.1080/02723646.2023.2189074
Margaret G. Owen, Zachary P. Taylor
ABSTRACT To assess the patterns and severity of disjunction at multiple taxonomic levels for birds, amphibians, crocodilians, and mammals in the western hemisphere, we compiled over 10,100 species ranges and analyzed each range using ERSI ArcMap (10.8.1). After identifying species ranges that were disjunct by 500 km or more, we calculated the mean distance between the disjunct range polygon and primary polygon (d) and relative disjunct area (A) and analyzed disjunction by geographic area and latitude. Birds are the most commonly disjunct taxa (19.3%), followed by mammals (6.4%) and amphibians (2.8%). According to distance and relative area, birds are more severely disjunct than amphibians and mammals. Geographically, South America is home to the largest number of disjunctions across all taxa and latitudinal trends show that disjunction varies by latitude and, coincident with species richness, peaks in the southern tropics. Similarities in disjunction patterns, particularly between mammals and amphibians, suggest that geographic factors, along with dispersal ability, play a key role in creating disjunct distributions.
{"title":"Patterns of disjunction in western hemisphere birds, amphibians, crocodilians, and mammals","authors":"Margaret G. Owen, Zachary P. Taylor","doi":"10.1080/02723646.2023.2189074","DOIUrl":"https://doi.org/10.1080/02723646.2023.2189074","url":null,"abstract":"ABSTRACT To assess the patterns and severity of disjunction at multiple taxonomic levels for birds, amphibians, crocodilians, and mammals in the western hemisphere, we compiled over 10,100 species ranges and analyzed each range using ERSI ArcMap (10.8.1). After identifying species ranges that were disjunct by 500 km or more, we calculated the mean distance between the disjunct range polygon and primary polygon (d) and relative disjunct area (A) and analyzed disjunction by geographic area and latitude. Birds are the most commonly disjunct taxa (19.3%), followed by mammals (6.4%) and amphibians (2.8%). According to distance and relative area, birds are more severely disjunct than amphibians and mammals. Geographically, South America is home to the largest number of disjunctions across all taxa and latitudinal trends show that disjunction varies by latitude and, coincident with species richness, peaks in the southern tropics. Similarities in disjunction patterns, particularly between mammals and amphibians, suggest that geographic factors, along with dispersal ability, play a key role in creating disjunct distributions.","PeriodicalId":54618,"journal":{"name":"Physical Geography","volume":null,"pages":null},"PeriodicalIF":1.6,"publicationDate":"2023-03-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45230033","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-03-10DOI: 10.1080/02723646.2023.2188632
C. Day, Q. Long
ABSTRACT Rainfall erosivity describes the capability of rainfall to cause soil erosion from a surface during a storm. Currently, the average long-term annual and monthly rainfall erosivity for a location may be obtained from isoerodent maps using a sample of climate stations across the United States (US). However, at the state-scale these measures are sporadic, using rainfall data from an increasingly outdated period, which may not reflect possible changing rainfall erosivity. Focusing on the state of Kentucky, US, we developed rainfall erosivity grids from the state Mesonet system to determine if erosivity has changed spatially and temporally between the original erosivity datasets from the latter twentieth-century and 2011–2020. We further used the Mesonet-derived dataset to develop a GIS-based model to estimate potential soil erosion for croplands during the fallow-season when soil is most prone to erosive storms. Results indicated that monthly erosivity increased across the state between the two periods. Larger increases in erosivity during the latter part of the fallow-season resulted in higher estimated soil erosion from croplands, particularly to the west. These findings may provide guidance in identifying and targeting croplands at greatest potential risk of soil erosion during the fallow-season for additional monitoring, mitigation and management practices.
{"title":"A GIS-based approach for estimating fallow-season cropland soil erosion based on rainfall erosivity","authors":"C. Day, Q. Long","doi":"10.1080/02723646.2023.2188632","DOIUrl":"https://doi.org/10.1080/02723646.2023.2188632","url":null,"abstract":"ABSTRACT Rainfall erosivity describes the capability of rainfall to cause soil erosion from a surface during a storm. Currently, the average long-term annual and monthly rainfall erosivity for a location may be obtained from isoerodent maps using a sample of climate stations across the United States (US). However, at the state-scale these measures are sporadic, using rainfall data from an increasingly outdated period, which may not reflect possible changing rainfall erosivity. Focusing on the state of Kentucky, US, we developed rainfall erosivity grids from the state Mesonet system to determine if erosivity has changed spatially and temporally between the original erosivity datasets from the latter twentieth-century and 2011–2020. We further used the Mesonet-derived dataset to develop a GIS-based model to estimate potential soil erosion for croplands during the fallow-season when soil is most prone to erosive storms. Results indicated that monthly erosivity increased across the state between the two periods. Larger increases in erosivity during the latter part of the fallow-season resulted in higher estimated soil erosion from croplands, particularly to the west. These findings may provide guidance in identifying and targeting croplands at greatest potential risk of soil erosion during the fallow-season for additional monitoring, mitigation and management practices.","PeriodicalId":54618,"journal":{"name":"Physical Geography","volume":null,"pages":null},"PeriodicalIF":1.6,"publicationDate":"2023-03-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45025403","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-03-01DOI: 10.1080/02723646.2023.2178691
Paula J. Perilla-Castillo, S. Driese, S. Horn, T. Rittenour, M. Nelson, L. McKay
ABSTRACT Two sediment profiles exposed along the floodplain of the Tennessee River provide an excellent opportunity to compare radiocarbon and optically stimulated luminescence dating of fluvial sediments, and to use soil micromorphology as a tool to assess the reliability of these dating methods. The profiles occur as vertical stacks of floodplain soils, buried soils, and fluvial deposits, with the sediments of both profiles indicating an alluvial origin, but with different degrees of soil development. Micromorphological analysis showed pedogenic clay coatings are common in both profiles. These pedofeatures provide evidence of relative age of the deposits, because layered, well-developed, thick clay coatings generally take thousands of years to form. Radiocarbon results indicate that the profiles span from the late early Holocene to late Holocene. OSL dating indicates that one profile is relatively recent (<600 yrs. B.P.) while the other is of late middle Holocene age (3.2 ka B.P. to 5.3 ka B.P.). Clay coatings support the results from OSL because the relatively recent profile has very thin coatings, in contrast with thick, well-developed clay coatings in the older profile. Some of the radiocarbon ages appear to be too old owing to redeposition, but other dates are consistent with soil development and micromorphology.
{"title":"Using soil micromorphology to assess the reliability of radiocarbon and OSL dating of fluvial deposits","authors":"Paula J. Perilla-Castillo, S. Driese, S. Horn, T. Rittenour, M. Nelson, L. McKay","doi":"10.1080/02723646.2023.2178691","DOIUrl":"https://doi.org/10.1080/02723646.2023.2178691","url":null,"abstract":"ABSTRACT Two sediment profiles exposed along the floodplain of the Tennessee River provide an excellent opportunity to compare radiocarbon and optically stimulated luminescence dating of fluvial sediments, and to use soil micromorphology as a tool to assess the reliability of these dating methods. The profiles occur as vertical stacks of floodplain soils, buried soils, and fluvial deposits, with the sediments of both profiles indicating an alluvial origin, but with different degrees of soil development. Micromorphological analysis showed pedogenic clay coatings are common in both profiles. These pedofeatures provide evidence of relative age of the deposits, because layered, well-developed, thick clay coatings generally take thousands of years to form. Radiocarbon results indicate that the profiles span from the late early Holocene to late Holocene. OSL dating indicates that one profile is relatively recent (<600 yrs. B.P.) while the other is of late middle Holocene age (3.2 ka B.P. to 5.3 ka B.P.). Clay coatings support the results from OSL because the relatively recent profile has very thin coatings, in contrast with thick, well-developed clay coatings in the older profile. Some of the radiocarbon ages appear to be too old owing to redeposition, but other dates are consistent with soil development and micromorphology.","PeriodicalId":54618,"journal":{"name":"Physical Geography","volume":null,"pages":null},"PeriodicalIF":1.6,"publicationDate":"2023-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46936728","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-01-10DOI: 10.1080/02723646.2022.2163539
R. Vázquez, T. Carlón-Allende, F. García-Tenorio, F. Mendiola
ABSTRACT During the afternoon of 23 September 2018, a flash flood event occurred at Peribán de Ramos (Michoacán, Mexico). This event was triggered by 2-h precipitation of 58 mm, affecting at least 100 families, damaging 30 houses and killing 8 people. We present the first assessment of this event, for which we carried out stratigraphic descriptions, took sedimentological samples of the deposits and performed numerical simulations with the FLO-2D model to recreate the flow. Our results present a good fit with the flow heights, velocities, and the distribution of the flood zones observed in the field. We additionally performed a flood hazard assessment based on a rainfall frequency analysis for extreme events of 2-h duration at different return periods. Results show that even the 2-year event would reach flow depths >5 m and velocities exceeding 6.5 m/s, causing the overspill of Cutio river, affecting ~1500 inhabitants and avocado farming lands, causing a bigger impact on the population’s incomes and their way of life. We consider that these types of events could become more frequent and of major magnitude due to the change in land cover and land use, obstruction of natural drainages and changes in precipitation patterns in response to climate change.
{"title":"Numerical modelling of a flash-flood event at Peribán de Ramos, Michoacán (Mexico)","authors":"R. Vázquez, T. Carlón-Allende, F. García-Tenorio, F. Mendiola","doi":"10.1080/02723646.2022.2163539","DOIUrl":"https://doi.org/10.1080/02723646.2022.2163539","url":null,"abstract":"ABSTRACT During the afternoon of 23 September 2018, a flash flood event occurred at Peribán de Ramos (Michoacán, Mexico). This event was triggered by 2-h precipitation of 58 mm, affecting at least 100 families, damaging 30 houses and killing 8 people. We present the first assessment of this event, for which we carried out stratigraphic descriptions, took sedimentological samples of the deposits and performed numerical simulations with the FLO-2D model to recreate the flow. Our results present a good fit with the flow heights, velocities, and the distribution of the flood zones observed in the field. We additionally performed a flood hazard assessment based on a rainfall frequency analysis for extreme events of 2-h duration at different return periods. Results show that even the 2-year event would reach flow depths >5 m and velocities exceeding 6.5 m/s, causing the overspill of Cutio river, affecting ~1500 inhabitants and avocado farming lands, causing a bigger impact on the population’s incomes and their way of life. We consider that these types of events could become more frequent and of major magnitude due to the change in land cover and land use, obstruction of natural drainages and changes in precipitation patterns in response to climate change.","PeriodicalId":54618,"journal":{"name":"Physical Geography","volume":null,"pages":null},"PeriodicalIF":1.6,"publicationDate":"2023-01-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49163063","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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