Sussex County, New Jersey /

"October 1986."

Somerset County, New Jersey /

"October 1986."

Soil surface textures, Salem County, New Jersey /

"October 1986."

Soil surface textures, Salem County, New Jersey /

"October 1986."

Union County, New Jersey /

"April 1985."

Warren County, New Jersey /

"June 1985."

FIRM, flood insurance rate map and street index, borough of Carteret, New Jersey, Middlesex County /

Relief shown by spot heights.

Use of hierarchical cluster analysis to assess the representativeness of a baseline groundwater quality monitoring network: comparison of New Zealand’s national and regional groundwater monitoring programs

Baseline monitoring of groundwater quality aims to characterize the ambient condition of the resource and identify spatial or temporal trends. Sites comprising any baseline monitoring network must be selected to provide a representative perspective of groundwater quality across the aquifer(s) of interest. Hierarchical cluster analysis (HCA) has been used as a means of assessing the representativeness of a groundwater quality monitoring network, using example datasets from New Zealand. HCA allows New Zealand's national and regional monitoring networks to be compared in terms of the number of water-quality categories identified in each network, the hydrochemistry at the centroids of these water-quality categories, the proportions of monitoring sites assigned to each water-quality category, and the range of concentrations for each analyte within each water-quality category. Through the HCA approach, the National Groundwater Monitoring Programme (117 sites) is shown to provide a highly representative perspective of groundwater quality across New Zealand, relative to the amalgamated regional monitoring networks operated by 15 different regional authorities (680 sites have sufficient data for inclusion in HCA). This methodology can be applied to evaluate the representativeness of any subset of monitoring sites taken from a larger network.

Albert Einstein; Princeton, New Jersey Portraits; Men

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Albert Einstein; Princeton, New Jersey Portraits; Men

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Albert Einstein; Princeton, New Jersey Portraits; Men

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Albert Einstein "The Giant"; New Jersey Portraits; Men

"Der Riese"

Albert Einstein; Princeton, New Jersey Portraits; Men

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Albert Einstein playing the violin with small orchestra; Princeton, New Jersey Portraits Men

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Albert Einstein with David Ben Gurion; Princeton, New Jersey Portraits; Groups; Men

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