Methodology for the identification of critical stream sampling points for the assurance of future water quality

R.O. Strobl, P.D. Robillard

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Abstract

One of the principal tools to ultimately understand the process dynamics of any watershed is a well-configured water quality monitoring network that evaluates current and emerging water quality problems. A review of the literature reveals that past approaches to water quality monitoring network design have often been arbitrary, without a coherent design strategy. The result of an improperly designed monitoring
network is generally the collection of water quality data with little analytical value or decision-making value (Ward, 1996). Each land unit area within a watershed has a pollution potential associated with it, depending on its topographic, soil, land use,
climatic, and vegetative attributes (Vieux and Farajalla, 1994). Furthermore, as these attributes can vary significantly over a watershed, the spatial location of a land parcel within a watershed also plays a major part in defining its pollution potential. For each stream cell, the surface and subsurface contributing areas can be defined and utilized to assign which cells within the watershed have a direct impact on a particular stream reach. This detailed information is needed in identifying candidate sampling points along a stream. The objective of this research was to develop with minimal data and by using analytical tools such as a GIS, fuzzy logic, and the simulation model
GWLF v. 2.0 (Haith et al., 1992), a practical and scientifically-based design methodology for designating critical water quality monitoring network sampling points within small agricultural forested watersheds with respect to total phosphorus (TP). In order to develop a basis for future implementations of this methodology for other contaminants, TP was selected as the illustrative contaminant under study since it can be used as a proxy for other conservative variables.
Original languageEnglish
Title of host publicationProceedings of the 5th European Congress on Regional Geoscientific Cartography and Information Systems: Earth and water
Subtitle of host publicationBarcelona 13-16 June 2006
EditorsVasco Errani
Place of PublicationBarcelona, Spain
PublisherInstitut Cartografic de Catalonia
Pages137-139
Volume1
Publication statusPublished - 2006
Event5th European Congress on Regional Geoscientific Cartography and Information Systems 2006 - Barcelona, Catalonia, Spain
Duration: 13 Jun 200616 Jun 2006
Conference number: 5

Conference

Conference5th European Congress on Regional Geoscientific Cartography and Information Systems 2006
Country/TerritorySpain
CityBarcelona, Catalonia
Period13/06/0616/06/06

Keywords

  • ADLIB-ART-1337
  • WRS

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