What is the spatial framework underlying SPARROW models?
|Back to Top| SPARROW is designed to describe the spatial patterns in water quality and the factors that affect it. This is accomplished by linking water-quality monitoring sites to a digital stream network that describes the spatial linkages between sites (upstream or downstream). Digital stream networks provide information on streams throughout a region and usually break streams into segments (reaches) that vary in size depending upon the scale of the data set. Drainage boundaries are established for each stream reach and these boundaries are used to identify the contributing drainage areas to stream reaches. Geographic data bases describing watershed characteristics such as land use are linked with the drainage areas to quantify the amount of each factor contributing to conditions in each stream reach. Thus the digital stream reach and associated drainage areas provide a spatial framework that allows the integration of data collected at water-quality monitoring sites with data descr
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