نتایج جستجو برای: catchments area

تعداد نتایج: 587685  

2006
R. J. Donohue T. R. McVicar

The Budyko curve describes the patterns observed between between climate, evapotranspiration and run-off and has proven to be a useful model for predicting catchment energy and water balances. In this paper we review the Budyko curve’s underlying framework and, based on the literature, present an argument for why it is important to include vegetation dynamics into the framework for some purpose...

2017
Luca C. Malatesta Michael P. Lamb

Waterfalls commonly exist near bounding faults of mountain ranges, where erosional bedrock catchments transition to depositional alluvial fans. We hypothesize that aggradation on alluvial fans can bury active faults, and that the faults accumulate slip in the subsurface to produce a bedrock scarp. Following entrenchment of the alluvial fan, the scarp can be exposed as a waterfall. To explore th...

2008
L. Moulin E. Gaume

This paper investigates the influence of mean areal rainfall estimation errors on a specific case study: the use of lumped conceptual rainfall-runoff models to simulate the flood hydrographs of three small to medium-sized catchments of the upper Loire river. This area (3200 km2) is densely covered by an operational network of stream and rain gauges. It is frequently exposed to flash floods and ...

2009
Pascal Sirguey Renaud Mathieu Yves Arnaud B. Blair Fitzharris

Situated in the Southern Alps, the Waitaki basin is the most important hydro catchment in New Zealand and provides approximately one-third of New Zealand’s hydro electricity production. Three sub-catchments receive most of the precipitation: Ohau, Pukaki, and Tekapo. In this alpine region an important fraction of the total precipitation falls as snow, which accumulates during winter months from...

Journal: :Proceedings of the National Academy of Sciences of the United States of America 2017
Lisa A Schulte Jarad Niemi Matthew J Helmers Matt Liebman J Gordon Arbuckle David E James Randall K Kolka Matthew E O'Neal Mark D Tomer John C Tyndall Heidi Asbjornsen Pauline Drobney Jeri Neal Gary Van Ryswyk Chris Witte

Loss of biodiversity and degradation of ecosystem services from agricultural lands remain important challenges in the United States despite decades of spending on natural resource management. To date, conservation investment has emphasized engineering practices or vegetative strategies centered on monocultural plantings of nonnative plants, largely excluding native species from cropland. In a c...

2004
DA Hughes

Rapid assessments of water resource availability in South Africa have been facilitated by the availability for a number of years of a national data set of naturalised monthly flow time series. However, these data are only available for moderate to large catchments (referred to as quaternary catchments). In the absence of further information it has often been the practice to apply a simple catch...

Journal: :Molecular ecology 2010
Lindy B Mullen H Arthur Woods Michael K Schwartz Adam J Sepulveda Winsor H Lowe

The network architecture of streams and rivers constrains evolutionary, demographic and ecological processes of freshwater organisms. This consistent architecture also makes stream networks useful for testing general models of population genetic structure and the scaling of gene flow. We examined genetic structure and gene flow in the facultatively paedomorphic Idaho giant salamander, Dicamptod...

2013
F. Levavasseur Jean-Stéphane Bailly P. Lagacherie F. Colin M. Rabotin

networks on surface runoff from agricultural catchments Levavasseur F., Bailly J.S., Lagacherie P., Colin F., Rabotin M. a UMR 1221 LISAH F-34035, INRA, Montpellier, France. b UMR 1221 LISAH F-34035, AgroParisTech, Montpellier, France. c UMR TETIS F-34093, AgroParisTech, Montpellier, France. d UMR 1221 LISAH F-34035, Montpellier SupAgro, Montpellier, France. Abstract The study of runoff is a cr...

2009
Nick Gust Joshua Griffiths

Since 1982 some Tasmanian platypuses have been affected by a fungal disease called mucormycosis. This disease causes skin lesions, morbidity and mortality in these iconic Australian animals. Here we review the contemporary understanding of the epidemiology of mucormycosis and its potential impacts on the conservation status of platypuses. Mucor amphibiorum, the fungal pathogen responsible for m...

2006
JONATHAN A. O’DONNELL

1. Riparian zones function as important ecotones that reduce nitrate concentration in groundwater and inputs into streams. In the boreal forest of interior Alaska, permafrost confines subsurface flow through the riparian zone to shallow organic horizons, where plant uptake of nitrate and denitrification are typically high. 2. In this study, riparian zone nitrogen retention was examined in a hig...

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