نتایج جستجو برای: in highland watersheds
تعداد نتایج: 16977197 فیلتر نتایج به سال:
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The urban stream syndrome may not be limited to streams in urbanized watersheds. We measured the spatial pattern of impervious cover in ∼82,800 small watersheds across the conterminous United States by comparing watershed-based and stream-based measures of imperviousness. The watershed-based measure was the commonly used watershed percentage impervious cover. The stream-based measure was the pe...
One of the problems of some cities in the country, especially those in the vicinity of mountainous watersheds, is the containment and control of runoff, erosion and sedimentation that results in many damages to downstream facilities and infrastructure each year. Watershed operations have been proposed for years to reduce and mitigate destructive effects, and some measures have been taken ...
We study hierachical segmentation in the framework of edgeweighted graphs. We define ultrametric watersheds as topological watersheds null on the minima. We prove that there exists a bijection between the set of ultrametric watersheds and the set of hierarchical edgesegmentations. We end this paper by showing how the proposed framework allows to see constrained connectivity as a classical water...
The decline of trees has been raised as one of the main problems in arid and semi-arid regions. Understanding the type and extent of the relationships among different environmental factors – e.g. soil characteristics as the basis for growth and development of plant species - and natural disturbances can be facilitated the ways of sustainable forest management and a useful tool for monitoring th...
Nuno A. M. Araújo*, K. Julian Schrenk, Hans J. Herrmann and José S. Andrade Jr. 1 Departamento de Física, Centro de Física Teórica e Computacional, Faculdade de Ciências, Universidade de Lisboa, Lisboa, Portugal 2 Department of Chemistry, University of Cambridge, Cambridge, UK 3 Departamento de Física, Universidade Federal do Ceará, Fortaleza, Ceará, Brazil 4 Computational Physics, Institute fo...
High rates of acidic deposition in the Adirondack region of New York have accelerated acidification of soils and surface waters. Annual input-output budgets for major solutes and acid-neutralizing capacity (ANC) were estimated for 43 drainage lake-watersheds in the Adirondacks from 1998 to 2000. Sulfate was the predominant anion on an equivalent basis in both precipitation and drainage export. ...
available online at http://meteoritics.org 1509 © The Meteoritical Society, 2006. Printed in USA. Martian subsurface properties and crater formation processes inferred from fresh impact crater geometries Sarah T. STEWART* and Gregory J. VALIANT Department of Earth and Planetary Sciences, Harvard University, 20 Oxford Street, Cambridge, Massachusetts 02138, USA *Corresponding author. E-mail: sst...
Title of Dissertation: DISTRIBUTION AND DYNAMICS OF THE EVERGREEN UNDERSTORY LAYER IN CENTRAL APPALACHIAN HIGHLAND FORESTS Robert A. Chastain Jr., Doctor of Philosophy, 2004 Dissertation Directed By: Associate Professor Philip A. Townsend, Marine, Estuarine and Environmental Science Graduate Program Evergreen understory layer communities dominated by Rhododendron maximum L. and/or Kalmia latifo...
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