نتایج جستجو برای: geomorphological method

تعداد نتایج: 1632685  

2017
Caroline C. Clason Sarah L. Greenwood Nick Selmes James M. Lea S. R. Jamieson Faezeh M. Nick Per Holmlund

35 36 New high resolution multibeam data in the Gulf of Bothnia reveal for the first time the 37 subglacial environment of a Bothnian Sea Ice Stream. The geomorphological record suggests 38 that increased meltwater production may have been important in driving rapid retreat of 39 Bothnian Sea ice during deglaciation. Here we apply a well-established one-dimensional 40 flowline model to simulate...

Journal: :Environmental management 2001
G M Kondolf M W Smeltzer S F Railsback

A 0.9 km-reach of Uvas Creek, California, was reconstructed as a sinuous, meandering channel in November 1995. In February 1996, this new channel washed out. We reviewed project documents to determine the basis for the project design and conducted our own historical geomorphological study to understand the processes operating in the catchment and project reach. The project was designed using a ...

2009
STEFAN W. KIENZLE Stefan W. Kienzle

The ARC/INFO 6.1 Grid system was applied in the 170 km large Henley Dam and the 19.4 km large Cedara basins, KwaZulu Natal, South Africa, to determine hydrological and geomorphological parameters required to simulate water quantity and water. A sensitivity analysis was carried out to evaluate the effects of the grid mesh size on basin slope by producing a number of grids with grid mesh sizes ra...

Journal: :Proceedings of the National Academy of Sciences of the United States of America 2012
Richard Streeter Andrew J Dugmore Orri Vésteinsson

In debates on societal collapse, Iceland occupies a position of precarious survival, defined by not becoming extinct, like Norse Greenland, but having endured, sometimes by the narrowest of margins. Classic decline narratives for late medieval to early modern Iceland stress compounding adversities, where climate, trade, political domination, unsustainable practices, and environmental degradatio...

2005
Marco Bezzi Alfonso Vitti

Many environmental processes depend on the amount of solar radiation at the ground level. Ground measurements are often available, even for long time series, and are used as input for spatial interpolation models to produce continuous maps of solar radiation. The aim of this work is to evaluate the results of different kriging interpolation approaches. This kind of comparison presents a relevan...

2015
Günther Prasicek Jan-Christoph Otto David R. Montgomery Lothar Schrott

In recent years, remote sensing, morphometric analysis, and other computational concepts and tools have invigorated the field of geomorphological mapping. Automated interpretation of digital terrain data based on impartial rules holds substantial promise for large dataset processing and objective landscape classification. However, the geomorphological realm presents tremendous complexity and ch...

Journal: :Environmental management 2014
Carol P Harden Anne Chin Mary R English Rong Fu Kathleen A Galvin Andrea K Gerlak Patricia F McDowell Dylan E McNamara Jeffrey M Peterson N LeRoy Poff Eugene A Rosa William D Solecki Ellen E Wohl

This article summarizes the primary outcomes of an interdisciplinary workshop in 2010, sponsored by the U.S. National Science Foundation, focused on developing key questions and integrative themes for advancing the science of human-landscape systems. The workshop was a response to a grand challenge identified recently by the U.S. National Research Council (2010a)--"How will Earth's surface evol...

2015
Geraldina Signa Antonio Mazzola Valentina Costa Salvatrice Vizzini

Soft bottom macrobenthic communities were studied seasonally in three coastal ponds (Marinello ponds, Italy) at increasing distances from a gull (Larus michahellis) colony to investigate the effect of seabird-induced eutrophication (i.e. guanotrophication) on macrobenthic fauna. We hypothesized that enhanced nutrient concentration and organic load caused by guano input significantly alter the t...

Journal: :تحقیقات جغرافیایی 0
داود مختاری مریم بیاتی خطیبی داود مختاری فریبا کرمی مریم بیاتی خطیبی

the proposal of geomorphologic matters in relation to tourism is one of interdisciplinary research approaches that has been considered in recent years. in this manner, geomorphological sites are defined as geomorphological landforms and processes that have acquired a scenic/aesthetic, scientific, cultural/historical and/or a social/economic value due to human perception of geological, geomorpho...

2000
Christopher Tilley Sue Hamilton Stephen Harrison CHRISTOPHER TILLEY

This article addresses the problem of how to distinguish between natural and humanly modified features of the cultural landscape with reference to clitter (boulder and stone) masses in the south-west of England using the example of Leskernick hill, Bodmin Moor with its well-preserved Bronze Age settlement. We first set out a series of criteria for distinguishing between natural and humanly plac...

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