Accuracy and Uncertainty in GIS

نویسنده

  • Suzanne Cox
چکیده

The introduction and advancement of spatial information technologies such as remote sensing and geographic information systems (GIS) have provided many (software) tools that assist in natural resource planning and management. GIS technology has particularly provided many cost-effective tools for evaluating land use/land cover (LU/LC) and the implications of different land use practices within a watershed (Crawford et al., 1998). In an attempt to study and/or predict the processes that occur within a watershed, hydrologic models are often used. Hydrologic models are mathematical simulations or algorithms that use measurements of local rainfall along with land use/land cover patterns, soil, topography, and drainage to predict streamflow or runoff as well as sediment loss or erosion that might be caused by a storm of a given magnitude (Campbell, 2002). Many hydrologic modeling applications require land cover information because land cover is an important variable that highly influences hydrological processes including watershed runoff and sediment loss (Ward and Elliot, 1995). Such models provide a means of estimating or predicting the impacts of certain land use/land cover changes.

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تاریخ انتشار 2007