A. DATA SOURCES AND DATA MANAGEMENT 



A.l Population and Cultural Features 



Data for population, number of household units, and recreation facilities were 

 updated to the year 1970 from highway maps and geological survey maps by use 

 of the Census of Population. Population projections were based upon the Public 

 Water Supply Study, Phase I, done for the Department of Resources and 

 Economic Development by Anderson, Nicholas, Inc. Data from this study also 

 provided an atlas of information conceming water-supply sources and water use. 

 Data were modified for individual cities and communities on the basis of engi- 

 neering studies conducted under the auspices of the city of Keene and the State 

 Water Supply and Pollution Control Commission. 



Further adjustment in data was made for programming convenience. For 

 example, suspended solids and biochemical oxygen demand (BOD) were con- 

 verted to total pounds in the water rather than parts per million. 



New Hampshire State Highway maps and U.S. Geological Survey maps were 

 the basis of cultural features and areas of different kinds of land use and water 

 bodies. The cultural features were updated from maps, based upon proportionate 

 increases in population, discussion with County Extension workers, inspection 

 of state timber tax records, and the Census of Water Works Utilities. These data 

 were further checked against organized community and utility records and 

 through personal inspection of the area involved. 



A.2 Precipitation and Runoff 



Precipitation was reflected in the model by actual surface-water runoff. Run- 

 off data were obtained from Water Resource Data for Massachusetts, New 

 Hampshire, Rhode Island and Vermont, Part I, Surface Water Records, United 

 States Department of Interior Geological Survey. Actual data for quality of 

 stream flow were obtained from records of the State Water Supply and Pollution 

 Control Commission. 



Overland surface-runoff quality from rural land was determined from informa- 

 tion supplied in personal correspondence with Samuel Kunkle, then of the 

 Agricultural Research Service (ARS), U.S. Department of Agriculture, on re- 

 search conducted in northeastern Vermont, and which covered forest land use, 

 agricultural land use, and rural village land use. Water-runoff quality for urban 

 land use was developed from Water Pollution Aspects of Urban Runoff, Federal 

 Water Pollution Control Administration, U.S. Department of the Interior, 

 January 1969. Data on water quality and pollution effects from industry were 

 developed from respective publications under the title "The Cost of Clean Water," 

 published by the Federal Water Pollution Control Administration of the U.S. 

 Department of the Interior. 



The three main water-quaUty indicators used were coliform count, bio- 

 chemical oxygen demand (as an indicator of dissolved oxygen), and suspended 

 solids. The coliform count totals were based on m.p.n. (most probable number 

 per 100 m.l.). The BOD total pounds estimates were based on five-day BOD 

 measurements in parts per million. Suspended solids estimates were based on 

 five-day BOD measurements in parts per million. Suspended sohds estimates 

 were expressed as total pounds in water and were developed from the industrial 

 reports in "The Cost of Clean Water" series. 



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