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Datasets

The table below shows which data were used to calculate each type of water resource vulnerability, and also indicates our source for each dataset.

 

Vulnerability Index

Indicators (unit) (data period)

Source

Water supply vulnerability

Resource

Mean annual runoff (m3/year) (water year 1976-2006)

Hamlet et al. (2010)

Total dam storage (m3)

NID (2010)

Temporal

Proportion of dry-seasonal runoff (July, August, Sept) to annual runoff (water year 1976-2006)

Hamlet et al. (2010)

Ratio of peak snow water equivalent (SWE) to October-March precipitation (water year 1976-2006)

Hamlet et al. (2010)

Extreme event

Number of days excess 25mm precipitation (days per year) (water year 1976-2006)

Hamlet et al. (2010)

Number of days less than 1mm precipitation (days per year) (water year 1976-2006)

Hamlet et al. (2010)

Land cover

Percent cover of urban areas (%)

USGS NLCD (2006)

Percent cover of irrigated land (%)

USGS NLCD (2006)

Water demand vulnerability

Demographic

Total population (persons) (2005)

USGS (2012)

Population density (persons per square kilometers) (2005)

USGS (2012)

Socio-economic

Population growth rate (1985, 2005)

USGS (2012)

Social vulnerability index (2005)

Cutter and Finch (2008)

Bulk demand

Total water consumption including public, municipal, irrigation, and industrial water use (m3) (2005)

USGS (2012)

Proportion of irrigation water use to total water consumption (2005)

USGS (2012)

Climate sensitivity

Number of days with max. air temperature > 30° C (days per year) (water year 1976-2006)

Hamlet et al. (2010)

Mean dry spell that consecutive daily precipitation < 1mm (days) (water year 1976-2006)

Hamlet et al. (2010)

Water quality vulnerability

Physical

Mean annual stream temperature

This project

Erosion potential (K-factor)

NRCS (2011)

Chemical

Total annual N loading potential

Wise and Johnson (2012)

Total annual P loading potential

Wise and Johnson (2012)

Biological

Algal bloom probability

This project

 

References:

Hamlet, A.F.; P. Carrasco; J. Deems; M.M. Elsner; T. Kamstra; C. Lee; S-Y Lee; G. Mauger; E.P. Salathe; I. Tohver and L. Whitely Binder. 2010. Final Project Report for the Columbia Basin Climate Change Scenarios Project.

NID (U.S. National Inventory of Dams), 2010.  

Cutter, S.L. and C. Finch. 2008. Temporal and spatial changes in social vulnerability to natural hazards. Proc. Natl. Acad. Sci. U.S. 105: 2301-2306.

Wise, D.R. and H.M. Johnson. 2011. Surface-water nutirient conditions and sources in the United States Pacific Northwest. J. Am. Water Resour. Assoc. 47:1110-1135.