Geodiversity of Samoa

Geoheritage, geoparks and geotourism, Год журнала: 2025, Номер unknown, С. 95 - 125

Опубликована: Янв. 1, 2025

Язык: Английский

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Paleoclimatic implications of glacial fluctuations in the Sierra Nevada del Cocuy, northern Andes, Colombia, during the Lateglacial and Holocene

Quaternary Science Reviews, Год журнала: 2025, Номер 363, С. 109458 - 109458

Опубликована: Июнь 5, 2025

Язык: Английский

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A Costa Rican Biological Puzzle—The Geological, Landscape, and Vicariance History as a Conditioning of the Past and Present Biogeography

World geomorphological landscapes, Год журнала: 2024, Номер unknown, С. 189 - 220

Опубликована: Янв. 1, 2024

Язык: Английский

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Geomorphological Model Comparison for Geosites, Utilizing Qualitative–Quantitative Assessment of Geodiversity, Coromandel Peninsula, New Zealand

Geographies, Год журнала: 2022, Номер 2(4), С. 609 - 628

Опубликована: Окт. 7, 2022

In qualitative–quantitative assessment of geodiversity, geomorphology describes landscape forms suggesting specific locations as geosites. However, all digital elevation models (DEM) contain information only about altitude and coordinate systems, which are not enough data for inclusion assessments. To overcome this, researchers may transform parameters into a range different such slope, aspect, plan, profile curvature. More complex Geomorphon or Topographic Position Index (TPI) be used to build visualizations landscapes. All these rarely together, but rather separately purposes—for example, aspect in soil science agriculture, while slope is considered useful geology topography. Therefore, geodiversity has been developed recognize possible geosite simplify their search through field observation further description. The Coromandel Peninsula have chosen an area study due diversity formed by Miocene–Pleistocene volcanism evolved on basement Jurassic Greywacke become surrounded partially covered Quaternary sediments. Hence, this research provides comparison six geomorphological assessment. Models based DEM with surface irregularities distinct differences, can These separated according representations: numerical value types landscape. Numerical (starting at 0, applied the study) ruggedness, roughness, total Meanwhile, TPI parameters, define relief ranging from stream valleys hills mountain ranges. using requires additional evaluation, unlike models. conclusion, we describe calculate values assessment, highlight potential hotspots. Subsequently, compared each other identify differences between them. Finally, outline advantages shortcomings performing

Язык: Английский

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Interactions between Geomorphology and Production Chain of High-Quality Coffee in Costa Rica

Sustainability, Год журнала: 2022, Номер 14(9), С. 5265 - 5265

Опубликована: Апрель 27, 2022

High-altitude coffee has an international reputation due to its high quality, especially in countries with a long production history, such as Costa Rica. Specific geographical characteristics determine the regions where high-altitude can be cultivated. Over last two decades, new conditions have promoted growth of smallholder farms Upper Buenavista Catchment (UBC) South To understand this phenomenon’s process, we initially performed detailed geomorphological mapping high-elevation sites UBC. Then, used remote sensing land cover (2005, 2012, and 2018) compare their landforms. Furthermore, analyzed production–processing–market chain that plantations since 2005. Our results show farmers chose more unstable erosive areas short-term prospects cultivate premium-priced coffee. Moreover, changed role sector, evolving from small producers entrepreneurs specialized knowledge. These actions may reduce economic risks improve household incomes producers. However, limited research been conducted along tropics about relationships between landforms, socioeconomic drivers, yield. Therefore, our are essential present geomorphology applied geography baselines land-use planning for agricultural landscapes.

Язык: Английский

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Evaluation of the hillslope fine-scale morphology under forest cover with pit-mound topography - Integration of geomorphometry, geophysical methods, and soil features

Geomorphology, Год журнала: 2024, Номер 460, С. 109283 - 109283

Опубликована: Май 28, 2024

Язык: Английский

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Agricultural Landscapes of Costa Rica

World geomorphological landscapes, Год журнала: 2024, Номер unknown, С. 221 - 258

Опубликована: Янв. 1, 2024

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Water stable isotopes reveal the hydrological response of Costa Rican glacial lakes to climate variability

Journal of South American Earth Sciences, Год журнала: 2022, Номер 120, С. 104091 - 104091

Опубликована: Ноя. 1, 2022

Язык: Английский

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Spatio-temporal variability of glacier surface area, ELA, and AAR in the Mago river basin of Arunachal Pradesh

Journal of Water and Climate Change, Год журнала: 2023, Номер 14(1), С. 253 - 271

Опубликована: Янв. 1, 2023

Abstract The spatial and temporal variations of glacier surface area, annual equilibrium line altitude (ELA), accumulation area ratio (AAR) in Mago basin, Eastern Himalaya, are studied over 1988–2019 using Landsat data. was mapped automatic extraction index (AGEI) 49 glaciers named as G1–G49 were found 2019. Fifteen with greater than 1 km2 2019 selected for analysis. An GIS tool comprising balance (AABR), AAR, mean elevation (MGE), combination NIR band Otsu threshold, used determining ELA. All experienced shrinkage a total loss 15.22 (28.48%) at 0.49 (0.92%) per annum. G1, G9, G15, G35, G41, G42 showed significant decreasing trend area. Glaciers facing South-West highest deglaciation. For the ELA, all increasing observed G2, G40. Overall, there an increase ELA by 137.3 m 4.43 m/year. average AAR varied from 0.44 to 0.97. Average about 0.8 South, South-East, North facing, 0.6 West 0.7 East glaciers.

Язык: Английский

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Geomorphological Analysis of Xilokastro Fault, Central Gulf of Corinth, Greece

Geosciences, Год журнала: 2021, Номер 11(12), С. 516 - 516

Опубликована: Дек. 16, 2021

The Gulf of Corinth is a rapidly opening area with high seismicity associated extensive building collapses, destruction cities, and even the deaths inhabitants. Rapid residential development, especially in southern part Corinth, construction crucial technical infrastructures necessitate understanding activity across crustal-scale faults that host devastating earthquakes. evolution landforms affected by fault action dominant issue geological science. In present study, was selected 20 km long Xilokastro pure normal fault. this fault, we apply eight geomorphological indices footwall catchments drain perpendicular to its trace. total, more than 5000 measurements were made 102 catchments. determination requires morphological profiles either or main tributaries drainage basins under consideration through use geographical information systems (ArcGIS platform). Τhe application these along draining scarp show active tectonics. Its evidenced values length-slope index near trace, low width height ratio index, strong asymmetry basins, overlapping zones between segments, elongated shape basins. This study supports idea single morphometric unable reflect distribution tectonics faults, which makes inevitable systematic comparison series tectonic from new combined emerges (Iat). Iat classifies degree at rate 75% length.

Язык: Английский

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