Search Results

You are looking at 1 - 6 of 6 items for :

  • Land Use and Ecosystems x
  • All content x
Clear All
Christopher Potter, Pusheng Zhang, Steven Klooster, Vanessa Genovese, Shashi Shekhar, and Vipin Kumar

1. Introduction Large rivers integrate the constituents and characteristics of the landscape through which they flow. Consequently, river discharge represents a valuable historical record of hydrologic patterns over complex drainage basins, and therefore has a particularly important role to play in understanding climatic and anthropogenic effects on terrestrial ecosystems at continental and global scales ( Vörösmarty and Sahagian, 2000 ). River flow has important implications for physics in the

Full access
Martin-Pierre Lavigne, Alain N. Rousseau, Richard Turcotte, Anne-Marie Laroche, Jean-Pierre Fortin, and Jean-Pierre Villeneuve

'aide d'un Système Informatisé (GIBSI), an integrated modeling and management system ( Rousseau et al., 2000a ; Rousseau et al., 2000b ; Villeneuve et al., 1998 ). By means of simulation models and management modules, GIBSI allows for the simulation of the impact of detailed management scenarios of dams, land use, agricultural diffuse pollution, and point source discharges on water quantity and quality of a watershed river network. A data pre- and postprocessing system manages relations between the

Full access
Jeffrey A. Hicke, David B. Lobell, and Gregory P. Asner

Great Plains states across to Montana, the Mississippi River Valley, and several counties in the western states. On a per-area basis, NPP was highest in the West (>800 g C m −2 yr −1 ; Figure 2b ) with only slightly lower values in the central United States, especially Nebraska, Illinois, and Iowa, as well as in scattered counties across the United States. Total production ( P = NPP × A ) was highest in the Midwest, northern Great Plains, Mississippi River Valley, and parts of Washington, Idaho

Full access
Christopher Small

of economic activity. 3. Continental physiography The physical landscape is generally assumed to be a determinant of urban development. Cultural, political, and socioeconomic factors are also determinants. Global analyses may reveal consistencies that transcend the other nonphysical factors. In the context of this discussion, continental physiography refers to the basic morphologic properties of the landscape. Here we consider elevation above sea level and proximity to permanent rivers and

Full access
Deborah A. McGrath, Jonathan P. Evans, C. Ken Smith, David G. Haskell, Neil W. Pelkey, Robert R. Gottfried, Charles D. Brockett, Matthew D. Lane, and E. Douglass Williams

macroinvertebrates was performed by S. and L. Hamilton (Austin Peay State University). Benthic macroinvertebrates were collected using a 500- μ m opening mesh D-net [this is a change from the Quality Assurance Project Plan (QAPP) because the streams were too narrow to use the 1.0-m-wide kick-net]. Collection followed the field-sampling procedures for a single habitat established in the EPA's Rapid Bioassessment Protocols (RBPs) for Use in Wadeable Streams and Rivers. At each site, a 100-m sampling reach was

Full access
Ademola K. Braimoh and Paul L. G. Vlek

-dependent relationships between population and environment in northeastern Thailand. Photogramm. Eng. Remote Sens 65 : 97 – 105 . Walsh , S. J. , T. W. Crawford , K. A. Crews-Meyer , and W. F. Welsh . 2001 . A multiscale analysis of land use/land cover change and NDVI variation in Nang Rong district, northeast Thailand. Agric. Ecosyst. Environ 85 : 47 – 64 . Figure 1. Extent of the Volta River basin. The main tributaries of the Volta Lake are shown, while the study area is within the rectangle

Full access